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US20050123437A1 - Methods and compositions for inhibiting metal corrosion - Google Patents

Methods and compositions for inhibiting metal corrosion Download PDF

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Publication number
US20050123437A1
US20050123437A1 US10/727,003 US72700303A US2005123437A1 US 20050123437 A1 US20050123437 A1 US 20050123437A1 US 72700303 A US72700303 A US 72700303A US 2005123437 A1 US2005123437 A1 US 2005123437A1
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United States
Prior art keywords
phenyl
beta
alpha
aqueous acid
methylcinnamaldehyde
Prior art date
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US10/727,003
Inventor
Juanita Cassidy
Keith Frost
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Halliburton Energy Services Inc
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Individual
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Priority to US10/727,003 priority Critical patent/US20050123437A1/en
Assigned to HALLIBURTON ENERGY SERVICES, INC. reassignment HALLIBURTON ENERGY SERVICES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CASSIDY, JUANITA M., FROST, KEITH A.
Priority to PCT/GB2004/004904 priority patent/WO2005054544A1/en
Priority to EP04798615A priority patent/EP1689911A1/en
Priority to CA002549127A priority patent/CA2549127A1/en
Publication of US20050123437A1 publication Critical patent/US20050123437A1/en
Priority to NO20062230A priority patent/NO20062230L/en
Priority to US12/622,290 priority patent/US8062586B2/en
Priority to US13/275,466 priority patent/US8318085B2/en
Abandoned legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/04—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/62—Compositions for forming crevices or fractures
    • C09K8/72—Eroding chemicals, e.g. acids
    • C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/32—Anticorrosion additives
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S166/00—Wells
    • Y10S166/902—Wells for inhibiting corrosion or coating

Definitions

  • the present invention relates to methods of inhibiting the corrosion of metal surfaces by aqueous acids and corrosion inhibiting compositions therefor.
  • Subterranean hydrocarbon containing formations penetrated by well bores are often treated with aqueous acids to stimulate the production of hydrocarbons therefrom.
  • acidizing involves the introduction of an aqueous acid solution into a subterranean formation under pressure so that the acid solution flows through the pore spaces of the formation. The acid reacts with acid soluble materials contained in the formation thereby increasing the size of the pore spaces and increasing the permeability of the formation.
  • Another production stimulation treatment known as “fracture-acidizing” involves the formation of one or more fractures in the formation and the introduction of an aqueous acid solution into the fractures to etch the fracture faces whereby channels are formed therein when the fractures close. The acid also enlarges the pore spaces in the fracture faces and in the formation.
  • Acidizing and fracture-acidizing solutions typically contain, for example, 15% to 28% hydrochloric acid which causes corrosion of metal surfaces in pumps, tubular goods and equipment used to introduce the aqueous acid solutions into the subterranean formations to be treated.
  • hydrochloric acid causes corrosion of metal surfaces in pumps, tubular goods and equipment used to introduce the aqueous acid solutions into the subterranean formations to be treated.
  • the expense associated with repairing or replacing corrosion damaged tubular goods and equipment can be very high.
  • the corrosion of tubular goods and down-hole equipment is increased by the elevated temperatures encountered in deep formations, and the corrosion results in at least the partial neutralization of the acid before it reacts with acid-soluble materials in the formations.
  • Aqueous acid solutions are also utilized in a variety of other industrial applications to contact and react with acid soluble materials.
  • metal surfaces are necessarily also contacted with the acid and any corrosion of the metal surfaces is highly undesirable.
  • other corrosive fluids such as aqueous alkaline solutions, heavy brines, petroleum streams containing acidic materials and the like are commonly transported through and corrode metal surfaces in tubular goods, pipelines and pumping equipment.
  • Cinnamaldehyde which has favorable environmental characteristics has been used for years in corrosion inhibitor formulations; however, the cinnamaldehyde molecule by itself provides only limited inhibition in 15% hydrochloric acid at temperatures greater than 225° F. and in 28% hydrochloric acid at temperatures greater than 200° F. Since cinnamaldehyde is one of the more ecologically benign organic materials in acid corrosion inhibiting compositions, improvements in cinnamaldehyde-based chemistry are actively pursued.
  • the present invention provides improved methods and compositions for inhibiting the corrosion of metal surfaces by aqueous acid solutions.
  • the corrosion inhibiting compositions of this invention inhibit the corrosion of metal surfaces contacted by the aqueous acid solutions at high temperatures.
  • the methods and compositions of this invention meet the needs described above and overcome the deficiencies of the prior art.
  • the methods of this invention for inhibiting the corrosion of metal surfaces by an aqueous acid solution basically comprise the steps of combining a corrosion inhibiting composition with the aqueous acid solution.
  • the corrosion inhibiting composition comprises the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine. Thereafter, the metal surfaces are contacted with the aqueous acid solution containing the reaction products.
  • the reaction product can be formulated before combining it with the aqueous acid solution, or the aldehyde or ketone and amine can be added directly to the water used in forming the aqueous acid solution and allowed to react therein to form the corrosion inhibiting composition.
  • the corrosion inhibiting compositions of this invention basically comprise the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine.
  • Metal corrosion inhibited aqueous acid compositions are also provided by this invention which basically comprise water, an acid and the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine.
  • Suitable acids that can be used include hydrochloric acid, acetic acid, formic acid, hydrofluoric acid and mixtures thereof.
  • the methods of this invention for inhibiting the corrosion of metal surfaces by an aqueous acid solution basically comprise the steps of combining a corrosion inhibiting composition with the aqueous acid solution and then contacting the metal surfaces with the aqueous acid solution containing the corrosion inhibiting composition.
  • the corrosion inhibiting composition comprises the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine.
  • the corrosion inhibiting composition can be formulated before combining it with the aqueous acid solution, or the alpha,beta-unsaturated aldehyde or ketone and the primary or secondary amine can be added directly to the water used in forming the aqueous acid solution and allowing them to react therein to form the corrosion inhibiting composition.
  • the metals that can be protected from corrosion by the corrosion inhibiting methods and compositions of this invention include, but are not limited to, steel grade N-80, J-55 P-110, QT800, HS80, and other common oil field alloys such as 13Cr, 25Cr, Incoloy 825 and 316L.
  • alpha,beta-unsaturated aldehydes and mixtures thereof include, but are not limited to: crotonaldehyde, 2-hexenal, 2-heptenal, 2-octenal, 2-nonenal, 2-decenal, 2-undecenal, 2-dodecenal, 2,4-hexadienal, 2,4-heptadienal, 2,4-octadienal, 2,4-nonadienal, 2,4-decadienal, 2,4-undecadienal, 2,4-dodecadienal, 2,6-dodecadienal, citral; 1-formyl-[2-(2-methylvinyl)]-2-n-octylethylene, cinnamaldehyde, dicinnamaldehyde, p-hydroxycinnamaldehyde, p-methylcinnamaldehyde, p
  • alpha,beta-unsaturated ketones examples include, but are not limited to: 4-phenyl-3-buten-2-one, 3-methyl-1-phenyl-2-buten-1-one; 4-phenyl-3-penten-2-one; 5-phenyl-4-penten-3-one; 6-phenyl-5-hexen-4-one; 7-phenyl-6-hepten-4-one-2-ol; 7-phenyl-6-hepten-4-one; 1,3-diphenyl-2-propen-1-one; 1,3-diphenyl-2-buten-1-one; dicinnamalacetone; 1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione, mesityl oxide; phorone; isophorone; 3-methyl-2-cyclohexen-1-one; 3,6-dimethyl-2,6-cycloheptadien-1-one; 5-methyl-4-hexen-3-one
  • beta-hydroxy aldehydes and ketones which dehydrate to give alpha,beta-unsaturated aldehydes and ketones under acidic conditions can be used.
  • Suitable primary or secondary amines include, but are not limited to, ethanolamine, diethanolamine, partially ethoxylated dehydroabietylamine, ethylamine, diethylamine, dehydroabietylamine, propylamine, dipropylamine, propanolamine, isopropanolamine, 2-propanol-1-amine, diisopropanolamine, butyl amine, dibutylamine, tert-butyl amine, pentyl amine, dipentylamine and tert-benzyl-tert-butylamine.
  • the amine is ethanolamine or diethanolamine and more preferably the amine is ethanolamine.
  • the molar ratio of the primary or secondary amine to the alpha,beta-unsaturated aldehyde or ketone is in the range of from about 0.1:1 to about 4:1, and more preferably from about 1:1 to about 4:1.
  • the corrosion inhibiting composition can also include an iodide source such as potassium iodide, sodium iodide, and iodine, solvents such as methanol, isopropanol, 2-ethyl-1-hexanol, ethylene glycol, propylene glycol, diethylene glycol and surfactants such as linear alcohol ethoxylates, amine alcohol ethoxylates, and ethoxylated amides.
  • an iodide source such as potassium iodide, sodium iodide, and iodine
  • solvents such as methanol, isopropanol, 2-ethyl-1-hexanol, ethylene glycol, propylene glycol, diethylene glycol and surfactants such as linear alcohol ethoxylates, amine alcohol ethoxylates, and ethoxylated amides.
  • the corrosion inhibiting composition is combined with the aqueous acid solution in an amount in the range of from about 0.01% to about 5% by volume of the aqueous acid solution, and more preferably from about 0.1% to about 3%.
  • the acids in the aqueous acid solutions in which the corrosion inhibiting methods and compositions of this invention are particularly effective include, but are not limited to, hydrochloric acid, acetic acid, formic acid, hydrofluoric acid, and mixtures of the acids.
  • the aqueous acid solution comprises an acid or mixture of acids in an amount up to about 32% by weight thereof. More preferably, the acid is hydrochloric acid present in the aqueous acid solution in an amount in the range of from about 5% to about 28% by weight thereof.
  • the corrosion inhibiting compositions of this invention are effective at hydrochloric acid concentrations of 15% up to about 300° F. and at hydrochloric acid concentrations of 28% up to about 275° F.
  • the corrosion inhibiting composition of this invention can also include a surfactant for dispersing the aldehyde in a corrosive aqueous fluid.
  • a surfactant for dispersing the aldehyde in a corrosive aqueous fluid examples include alkyoxylated fatty acids, alkylphenol alkoxylates, ethoxylated amides and ethoxylated alkyl amines.
  • a dispersing surfactant of the type described above is utilized in a corrosion inhibiting composition of this invention, it is generally present in the composition in an amount in the range of from about 1% to about 45% by weight of the compositon.
  • Another component which can be included in the corrosion inhibiting compositions is a solvent for the aldehyde oligomers which also dissolves in water, referred to herein as a “mutual solvent.”
  • solvents are methyl alcohol, ethyl alcohol, isopropyl alcohol, ethylene glycol, propylene glycol, dimethyl formamide, N-methyl pyrrolidone, propylene glycol methyl ether and butyl cellosolve.
  • a mutual solvent of the type described above is included in a corrosion inhibiting composition of this invention, it is generally present in an amount in the range of from about 1% to about 40% by weight of the composition.
  • the corrosion inhibiting compositions can include one or more quaternary ammonium compounds, one or more corrosion inhibitor activators and other components commonly utilized in corrosion inhibiting formulations such as acetylenic alcohols, Mannich condensation products formed by reacting an aldehyde, a carbonyl containing compound and a nitrogen containing compound, unsaturated carbonyl compounds, unsaturated ether compounds, formamide, formic acid, formates, other sources of carbonyl, iodides, terpenes, and aromatic hydrocarbons.
  • corrosion inhibiting formulations such as acetylenic alcohols, Mannich condensation products formed by reacting an aldehyde, a carbonyl containing compound and a nitrogen containing compound, unsaturated carbonyl compounds, unsaturated ether compounds, formamide, formic acid, formates, other sources of carbonyl, iodides, terpenes, and aromatic hydrocarbons.
  • the quaternary ammonium compounds which function as corrosion inhibitors and can be utilized in accordance with the present invention have the general formula: (R) 4 N + X ⁇ wherein each R is the same or a different group selected from long chain alkyl groups, cycloalkyl groups, aryl groups or heterocyclic groups, and X is an anion such as a halide.
  • the term “long chain” is used herein to mean hydrocarbon groups having in the range of from about 12 to about 20 carbon atoms.
  • Examples of quaternary ammonium compounds which can be included in the corrosion inhibiting compositions of this invention are N-alkyl, N-cycloalkyl and N-alkylarylpyridinium halides such as N-cyclohexylpyridinium bromide or chloride, N-alkyl, N-cycloalkyl and N-alkylarylquinolinium halides such as N-dodecylquinolinium bromide or chloride, and the like.
  • a quaternary ammonium compound is included in a composition of this invention, it is generally present in an amount in the range of from about 1% to about 45% by weight of the composition.
  • Corrosion inhibitor activators function to activate corrosion inhibitor components such as quaternary ammonium compounds so that they function as corrosion inhibitors.
  • corrosion inhibitor activators which can be utilized are cuprous iodide; cuprous chloride; antimony compounds such as antimony oxides, antimony halides, antimony tartrate, antimony citrate, alkali metal salts of antimony tartrate and antimony citrate, alkali metal salts of pyroantimonate and antimony adducts of ethylene glycol; bismuth compounds such as bismuth oxides, bismuth halides, bismuth tartrate, bismuth citrate, alkali metal salts of bismuth tartrate and bismuth citrate; iodine; iodide compounds; formic acid; and mixtures of the foregoing activators such as a mixture of formic acid and potassium iodide.
  • a corrosion inhibitor activator is included in a composition of this invention, it is generally present in an amount in the range of from about 0.1% to
  • a preferred method of this invention for inhibiting the corrosion of metal surfaces contacted by an aqueous acid solution comprises: (a) combining a corrosion inhibiting composition with the aqueous acid solution, the corrosion inhibiting composition comprising the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine; and then (b) contacting the metal surfaces with the aqueous acid solution containing the reaction product.
  • a preferred composition of this invention for inhibiting the corrosion of metal surfaces by an aqueous acid solution when the composition is added to the aqueous acid solution comprises the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine.
  • a preferred metal corrosion inhibited aqueous acid composition of this invention comprises water; an acid selected from the group consisting of hydrochloric acid, acetic acid, formic acid, hydrofluoric acid and mixtures thereof; and the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine.
  • the corrosion inhibition ability of cinnamaldehyde was compared to that of cinnamaldehyde dehydroabietylimine, the reaction product of cinnamaldehyde and a partially ethoxylated dehydroabietylamine available commercially under the trade name “RAD 1110TM” from Hercules Chemical Resins Division, Wilmington, Del.
  • the cinnamaldehyde and ethoxylated dehydroabietylamine were added to and reacted directly in the water used in forming the 15% by weight aqueous solutions of HCl as shown in Table I.
  • the weight loss of N-80 steel was measured after a six-hour exposure to the HCl and inhibitor blend at 225° F.
  • Blend Corrosion Loss (lb/ft 2 ) 4 mL methyl alcohol, 0.794 51.8 mL H 2 O, 44.2 mL 31.45% HCl 0.48 mL (3.79 ⁇ 10 ⁇ 3 mol) cinnamaldehyde, 0.458 4 mL methyl alcohol, 51.3 mL H 2 O 44.2 mL 31.45% HCl 0.48 mL cinnamaldehyde (3.79 ⁇ 10 ⁇ 3 mol), 0.026 4 mL methyl alcohol, 1 mL RAD 1110 TM (1.4 ⁇ 10 ⁇ 3 mol), 50.3 mL H 2 O 44.2 mL 31.45% HCl 0.48 mL cinnamaldehyde (3.79 ⁇ 10 ⁇ 3 mol), 0.047 4 mL methyl alcohol, 2.8 mL RAD 1110 TM (4.2 ⁇ 10 ⁇ 3 mol), 48.5 mL H 2 O 44.2 mL 31
  • Inhibitor Blend A consisted of 2.5% NaI, 27.75% propylene glycol, 5% 2-ethyl-1-hexanol, 18% mixture of cinnamaldehyde and vinylogated cinnamaldehyde, 7% naphthenic acid ethoxylate [18-20 mols ethoxylate (EO)], 1.75% lauryl alcohol ethoxylate [23 mols EO], and 38% ethanolamine (percents given are weight percents).
  • Blend B consisted of 4.0% NaI, 44.8% propylene glycol, 8.1% 2-ethyl-1-hexanol, 29.0% mixture of cinnamaldehyde, 11.3% naphthenic acid ethoxylate [18-20 mols EO], and 2.8% lauryl alcohol ethoxylate [23 mols EO] (percents given are weight percents).
  • Blend C consisted of 4.0% NaI, 44.8% propylene glycol, 8.1% 2-ethyl-1-hexanol, 29.0% mixture of cinnamaldehyde and vinylogated cinnamaldehyde, 11.3% naphthenic acid ethoxylate [18-20 mols EO], and 2.8% lauryl alcohol ethoxylate [23 mols EO] (percents given are weight percents).
  • Blend D consisted of 2.5% NaI, 27.75% propylene glycol, 5% 2-ethyl-1-hexanol, 18% mixture of cinnamaldehyde and vinylogated cinnamaldehyde, 7% naphthenic acid ethoxylate [18-20 mols EO], 1.75% lauryl alcohol ethoxylate [23 mols EO], and 38% diethanolamine (percents given are weight percents).
  • Blend E consisted of 2.5% NaI, 27.75% propylene glycol, 5% 2-ethyl-1-hexanol, 18% mixture of cinnamaldehyde and vinylogated cinnamaldehyde, 7% naphthenic acide ethoxylate [18-20 mols EO], 1.75% lauryl alcohol ethoxylate [23 mols EO], and 38% triethanolamine (percents given are weight percents).
  • Blend F consists of 3.0% NaI, 33.8% propylene glycol, 6.1% 2-ethyl-1-hexanol, 8.5% naphthenic acid ethoxylate [18-20 mols EO], 2.1% lauryl alcohol ethoxylate [23 mols EO], and 46.3% ethanolamine (percents given are weight percents).
  • the first test in Table II is a blank test showing the loss of metal for an uninhibited acid under the given conditions.
  • Tests 2-6 demonstrate the superior corrosion inhibiting performance of the cinnamaldehyde/vinylogated cinnamaldehyde imine and cinnamaldehyde/vinylogated cinnamaldehyde hemiaminal of diethanolamine compared to unreacted cinnamaldehyde and unreacted vinylogated cinnamaldehyde.
  • Test 7 shows the higher corrosion losses percent when utilizing the tertiary amine triethanolamine in the blend.
  • the last tests demonstrate excellent corrosion inhibition of different metals, specifically N-80, 13Cr 25Cr.
  • Table III demonstrates cinnamaldehyde reacted with amines, in situ, in 15% HCl at 225° F. containing N-80 steel for 3 hours.
  • the cinnamaldehyde and amine were each added to the test cell along with 4 mL MeOH, followed by the appropriate quantity of water and concentrated HCl to make 100 mL of 15% HCl blend. From Table III, it can be seen that the aldehyde-amine reaction product provides excellent corrosion inhibition.
  • Table IV demonstrates the ketone/amine reaction of this invention in 15% HCl at 225° F. containing N-80 steel for 3 hours.
  • Each ketone/amine reaction product was made by refluxing the ketone and amine in a 1:1 molar ratio in MeOH for the 4-Phenyl-3-buten-2-one, or acetone for the chalcone, for several hours.
  • the ketone/amine reaction products were each added to the test cell along with 4 mL MeOH, followed by the appropriate quantity of water and concentrated HCl to make 100 mL of 15% HCl blend. From Table IV, it can be seen that the ketone/amine reaction product provides excellent corrosion inhibition.
  • Table V demonstrates 3,7-dimethyl-2,6-octadienal reacted with ethanolamine and added to 15% HCl at 225° F. containing N-80 steel for 3 hours.
  • the 3,7-dimethyl-2,6-octadienal and amine were each added to the test cell along with 4 mL MeOH, followed by the appropriate quantity of water and concentrated HCl to make 100 mL of 15% HCl blend. From Table V, it can be seen that the aldehyde/amine reaction product provides excellent corrosion inhibition.

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Abstract

Methods and compositions are provided that inhibit the corrosion of metal surfaces by aqueous acid solutions. The inhibition is basically achieved by the addition of a reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine to the aqueous acid solution.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to methods of inhibiting the corrosion of metal surfaces by aqueous acids and corrosion inhibiting compositions therefor.
  • 2. Description of the Prior Art
  • Subterranean hydrocarbon containing formations penetrated by well bores are often treated with aqueous acids to stimulate the production of hydrocarbons therefrom. One such treatment generally referred to as “acidizing” involves the introduction of an aqueous acid solution into a subterranean formation under pressure so that the acid solution flows through the pore spaces of the formation. The acid reacts with acid soluble materials contained in the formation thereby increasing the size of the pore spaces and increasing the permeability of the formation. Another production stimulation treatment known as “fracture-acidizing” involves the formation of one or more fractures in the formation and the introduction of an aqueous acid solution into the fractures to etch the fracture faces whereby channels are formed therein when the fractures close. The acid also enlarges the pore spaces in the fracture faces and in the formation.
  • Acidizing and fracture-acidizing solutions typically contain, for example, 15% to 28% hydrochloric acid which causes corrosion of metal surfaces in pumps, tubular goods and equipment used to introduce the aqueous acid solutions into the subterranean formations to be treated. The expense associated with repairing or replacing corrosion damaged tubular goods and equipment can be very high. The corrosion of tubular goods and down-hole equipment is increased by the elevated temperatures encountered in deep formations, and the corrosion results in at least the partial neutralization of the acid before it reacts with acid-soluble materials in the formations.
  • Aqueous acid solutions are also utilized in a variety of other industrial applications to contact and react with acid soluble materials. In such applications, metal surfaces are necessarily also contacted with the acid and any corrosion of the metal surfaces is highly undesirable. In addition, other corrosive fluids such as aqueous alkaline solutions, heavy brines, petroleum streams containing acidic materials and the like are commonly transported through and corrode metal surfaces in tubular goods, pipelines and pumping equipment.
  • A variety of metal corrosion inhibiting additives have been developed for aqueous acid fluids; however, many of them are considered environmentally objectionable. Cinnamaldehyde which has favorable environmental characteristics has been used for years in corrosion inhibitor formulations; however, the cinnamaldehyde molecule by itself provides only limited inhibition in 15% hydrochloric acid at temperatures greater than 225° F. and in 28% hydrochloric acid at temperatures greater than 200° F. Since cinnamaldehyde is one of the more ecologically benign organic materials in acid corrosion inhibiting compositions, improvements in cinnamaldehyde-based chemistry are actively pursued.
  • Some improvements have been made to the corrosion inhibiting properties of cinnamaldehyde by combining it with quaternary aromatic amine salts along with acid soluble antimony or bismuth to achieve improved corrosion inhibition of high chromium steel. Other efforts have concentrated on high density brines to which an aldehyde, a primary amine and a thiocyanate salt are added.
  • There remains a continuing need for improved methods and metal corrosion inhibiting compositions which are effective when combined with aqueous acids, especially at elevated temperatures.
    • SUMMARY OF THE INVENTION
  • The present invention provides improved methods and compositions for inhibiting the corrosion of metal surfaces by aqueous acid solutions. When added to aqueous acid solutions, the corrosion inhibiting compositions of this invention inhibit the corrosion of metal surfaces contacted by the aqueous acid solutions at high temperatures. Thus, the methods and compositions of this invention meet the needs described above and overcome the deficiencies of the prior art.
  • The methods of this invention for inhibiting the corrosion of metal surfaces by an aqueous acid solution basically comprise the steps of combining a corrosion inhibiting composition with the aqueous acid solution. The corrosion inhibiting composition comprises the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine. Thereafter, the metal surfaces are contacted with the aqueous acid solution containing the reaction products.
  • The reaction product can be formulated before combining it with the aqueous acid solution, or the aldehyde or ketone and amine can be added directly to the water used in forming the aqueous acid solution and allowed to react therein to form the corrosion inhibiting composition.
  • The corrosion inhibiting compositions of this invention basically comprise the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine.
  • Metal corrosion inhibited aqueous acid compositions are also provided by this invention which basically comprise water, an acid and the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine. Suitable acids that can be used include hydrochloric acid, acetic acid, formic acid, hydrofluoric acid and mixtures thereof.
    • DESCRIPTION OF PREFERRED EMBODIMENTS
  • The methods of this invention for inhibiting the corrosion of metal surfaces by an aqueous acid solution basically comprise the steps of combining a corrosion inhibiting composition with the aqueous acid solution and then contacting the metal surfaces with the aqueous acid solution containing the corrosion inhibiting composition. The corrosion inhibiting composition comprises the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine. The corrosion inhibiting composition can be formulated before combining it with the aqueous acid solution, or the alpha,beta-unsaturated aldehyde or ketone and the primary or secondary amine can be added directly to the water used in forming the aqueous acid solution and allowing them to react therein to form the corrosion inhibiting composition.
  • The metals that can be protected from corrosion by the corrosion inhibiting methods and compositions of this invention include, but are not limited to, steel grade N-80, J-55 P-110, QT800, HS80, and other common oil field alloys such as 13Cr, 25Cr, Incoloy 825 and 316L.
  • Examples of suitable alpha,beta-unsaturated aldehydes and mixtures thereof that can be utilized in accordance with the present invention include, but are not limited to: crotonaldehyde, 2-hexenal, 2-heptenal, 2-octenal, 2-nonenal, 2-decenal, 2-undecenal, 2-dodecenal, 2,4-hexadienal, 2,4-heptadienal, 2,4-octadienal, 2,4-nonadienal, 2,4-decadienal, 2,4-undecadienal, 2,4-dodecadienal, 2,6-dodecadienal, citral; 1-formyl-[2-(2-methylvinyl)]-2-n-octylethylene, cinnamaldehyde, dicinnamaldehyde, p-hydroxycinnamaldehyde, p-methylcinnamaldehyde, p-ethylcinnamaldehyde, p-methoxycinnamaldehyde, p-dimethylaminocinnamaldehyde, p-diethylaminocinnamaldehyde, p-nitrocinnamaldehyde, o-nitrocinnamaldehyde, o-allyloxycinnamaldehyde, 4-(3-propenal)cinnamaldehyde, p-sodium sulfocinnamaldehyde, p-trimethylammoniumcinnamaldehyde sulfate, p-trimethylammoniumcinnamaldehyde o-methylsulfate, p-thiocyanocinnamaldehyde, p-(S-acetyl)thiocinnamaldehyde, p-(S-N,N-dimethylcarbamoylthio)cinnamaldehyde, p-chlorocinnamaldehyde, 5-phenyl-2,4-pentadienal, 7-phenyl-2,4,6-heptatrienal, 5-(p-methoxyphenyl)-2,4-pentadienal; 2,3-diphenylacrolein, 3,3-diphenylacrolein, α-methylcinnamaldehyde, β-methylcinnamaldehyde, α-chlorocinnamaldehyde, α-bromocinnamaldehyde, α-butylcinnamaldehyde, α-amylcinnamaldehyde, α-hexylcinnamaldehyde; 2-(p-methylbenzylidine)decanal, α-bromo-p-cyanocinnamaldehyde, α-ethyl-p-methylcinnamaldehyde, p-methyl-α-pentylcinnamaldehyde, 3,4-dimethoxy-α-methylcinnamaldehyde, α-[(4-methylphenyl)methylene]benzeneacetaldehyde, α-(hydroxymethylene)-4-methylbenzylacetaldehyde, 4-chloro-α-(hydroxymethylene)benzeneacetaldehyde, α-nonylidenebenzeneacetaldehyde, 3,7-dimethyl-2,6-octadienal, and the like.
  • Examples of suitable alpha,beta-unsaturated ketones that can be utilized include, but are not limited to: 4-phenyl-3-buten-2-one, 3-methyl-1-phenyl-2-buten-1-one; 4-phenyl-3-penten-2-one; 5-phenyl-4-penten-3-one; 6-phenyl-5-hexen-4-one; 7-phenyl-6-hepten-4-one-2-ol; 7-phenyl-6-hepten-4-one; 1,3-diphenyl-2-propen-1-one; 1,3-diphenyl-2-buten-1-one; dicinnamalacetone; 1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione, mesityl oxide; phorone; isophorone; 3-methyl-2-cyclohexen-1-one; 3,6-dimethyl-2,6-cycloheptadien-1-one; 5-methyl-4-hexen-3-one, and the like.
  • Also, beta-hydroxy aldehydes and ketones which dehydrate to give alpha,beta-unsaturated aldehydes and ketones under acidic conditions can be used.
  • Suitable primary or secondary amines include, but are not limited to, ethanolamine, diethanolamine, partially ethoxylated dehydroabietylamine, ethylamine, diethylamine, dehydroabietylamine, propylamine, dipropylamine, propanolamine, isopropanolamine, 2-propanol-1-amine, diisopropanolamine, butyl amine, dibutylamine, tert-butyl amine, pentyl amine, dipentylamine and tert-benzyl-tert-butylamine. Preferably, the amine is ethanolamine or diethanolamine and more preferably the amine is ethanolamine.
  • The molar ratio of the primary or secondary amine to the alpha,beta-unsaturated aldehyde or ketone is in the range of from about 0.1:1 to about 4:1, and more preferably from about 1:1 to about 4:1.
  • The reaction of a primary or secondary amine with an alpha,beta-unsaturated aldehyde or ketone yields aldehyde or ketone imines and hemiaminals, and iminium ions of the amine. The general reaction to form imines, hemiaminals and iminium ions is given below:
    Figure US20050123437A1-20050609-C00001
  • The corrosion inhibiting composition can also include an iodide source such as potassium iodide, sodium iodide, and iodine, solvents such as methanol, isopropanol, 2-ethyl-1-hexanol, ethylene glycol, propylene glycol, diethylene glycol and surfactants such as linear alcohol ethoxylates, amine alcohol ethoxylates, and ethoxylated amides.
  • Preferably, the corrosion inhibiting composition is combined with the aqueous acid solution in an amount in the range of from about 0.01% to about 5% by volume of the aqueous acid solution, and more preferably from about 0.1% to about 3%.
  • As mentioned, the acids in the aqueous acid solutions in which the corrosion inhibiting methods and compositions of this invention are particularly effective include, but are not limited to, hydrochloric acid, acetic acid, formic acid, hydrofluoric acid, and mixtures of the acids. Preferably, the aqueous acid solution comprises an acid or mixture of acids in an amount up to about 32% by weight thereof. More preferably, the acid is hydrochloric acid present in the aqueous acid solution in an amount in the range of from about 5% to about 28% by weight thereof.
  • In practice, corrosion rates generally tend to increase with increasing acid concentration and with increasing temperature. While aldehydes and ketones provide only limited corrosion protection in 15% hydrochloric acid at temperatures higher than 225° F., and in 28% hydrochloric acid at temperatures higher than 200° F., the reaction products of alpha,beta-unsaturated aldehydes or ketones including cinnamaldehyde with primary or secondary amines provide significantly improved corrosion inhibition of metal surfaces under the above mentioned conditions. Generally, the corrosion inhibiting compositions of this invention are effective at hydrochloric acid concentrations of 15% up to about 300° F. and at hydrochloric acid concentrations of 28% up to about 275° F.
  • As also mentioned, the corrosion inhibiting composition of this invention can also include a surfactant for dispersing the aldehyde in a corrosive aqueous fluid. Examples of suitable such dispersing surfactants are alkyoxylated fatty acids, alkylphenol alkoxylates, ethoxylated amides and ethoxylated alkyl amines. When a dispersing surfactant of the type described above is utilized in a corrosion inhibiting composition of this invention, it is generally present in the composition in an amount in the range of from about 1% to about 45% by weight of the compositon.
  • Another component which can be included in the corrosion inhibiting compositions is a solvent for the aldehyde oligomers which also dissolves in water, referred to herein as a “mutual solvent.” Examples of such solvents are methyl alcohol, ethyl alcohol, isopropyl alcohol, ethylene glycol, propylene glycol, dimethyl formamide, N-methyl pyrrolidone, propylene glycol methyl ether and butyl cellosolve. When a mutual solvent of the type described above is included in a corrosion inhibiting composition of this invention, it is generally present in an amount in the range of from about 1% to about 40% by weight of the composition.
  • In addition, the corrosion inhibiting compositions can include one or more quaternary ammonium compounds, one or more corrosion inhibitor activators and other components commonly utilized in corrosion inhibiting formulations such as acetylenic alcohols, Mannich condensation products formed by reacting an aldehyde, a carbonyl containing compound and a nitrogen containing compound, unsaturated carbonyl compounds, unsaturated ether compounds, formamide, formic acid, formates, other sources of carbonyl, iodides, terpenes, and aromatic hydrocarbons.
  • The quaternary ammonium compounds which function as corrosion inhibitors and can be utilized in accordance with the present invention have the general formula:
    (R)4N+X−
    wherein each R is the same or a different group selected from long chain alkyl groups, cycloalkyl groups, aryl groups or heterocyclic groups, and X is an anion such as a halide. The term “long chain” is used herein to mean hydrocarbon groups having in the range of from about 12 to about 20 carbon atoms. Examples of quaternary ammonium compounds which can be included in the corrosion inhibiting compositions of this invention are N-alkyl, N-cycloalkyl and N-alkylarylpyridinium halides such as N-cyclohexylpyridinium bromide or chloride, N-alkyl, N-cycloalkyl and N-alkylarylquinolinium halides such as N-dodecylquinolinium bromide or chloride, and the like. When a quaternary ammonium compound is included in a composition of this invention, it is generally present in an amount in the range of from about 1% to about 45% by weight of the composition.
  • Corrosion inhibitor activators function to activate corrosion inhibitor components such as quaternary ammonium compounds so that they function as corrosion inhibitors. Examples of such corrosion inhibitor activators which can be utilized are cuprous iodide; cuprous chloride; antimony compounds such as antimony oxides, antimony halides, antimony tartrate, antimony citrate, alkali metal salts of antimony tartrate and antimony citrate, alkali metal salts of pyroantimonate and antimony adducts of ethylene glycol; bismuth compounds such as bismuth oxides, bismuth halides, bismuth tartrate, bismuth citrate, alkali metal salts of bismuth tartrate and bismuth citrate; iodine; iodide compounds; formic acid; and mixtures of the foregoing activators such as a mixture of formic acid and potassium iodide. When a corrosion inhibitor activator is included in a composition of this invention, it is generally present in an amount in the range of from about 0.1% to about 5.0% by weight of the composition.
  • A preferred method of this invention for inhibiting the corrosion of metal surfaces contacted by an aqueous acid solution comprises: (a) combining a corrosion inhibiting composition with the aqueous acid solution, the corrosion inhibiting composition comprising the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine; and then (b) contacting the metal surfaces with the aqueous acid solution containing the reaction product.
  • A preferred composition of this invention for inhibiting the corrosion of metal surfaces by an aqueous acid solution when the composition is added to the aqueous acid solution comprises the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine.
  • A preferred metal corrosion inhibited aqueous acid composition of this invention comprises water; an acid selected from the group consisting of hydrochloric acid, acetic acid, formic acid, hydrofluoric acid and mixtures thereof; and the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine.
  • In order to further illustrate the corrosion inhibiting methods and compositions of the present invention, the following examples are given.
    • EXAMPLE 1
  • The corrosion inhibition ability of cinnamaldehyde was compared to that of cinnamaldehyde dehydroabietylimine, the reaction product of cinnamaldehyde and a partially ethoxylated dehydroabietylamine available commercially under the trade name “RAD 1110™” from Hercules Chemical Resins Division, Wilmington, Del. The cinnamaldehyde and ethoxylated dehydroabietylamine were added to and reacted directly in the water used in forming the 15% by weight aqueous solutions of HCl as shown in Table I. The weight loss of N-80 steel was measured after a six-hour exposure to the HCl and inhibitor blend at 225° F. Also shown in Table I are the weight losses of N-80 steel measured after six hour exposures in a 15% by weight aqueous solution of HCl and in a 15% by weight aqueous solution of HCl containing only cinnamaldehyde.
    TABLE I
    Comparison of Cinnamaldehyde to Cinnamaldehyde Dehydrobietylimine
    Corrosion Inhibition of N-80 Steel in 15% HCl at 225° F.
    Blend Corrosion Loss (lb/ft2)
      4 mL methyl alcohol, 0.794
    51.8 mL H2O,
    44.2 mL 31.45% HCl
    0.48 mL (3.79 × 10−3 mol) cinnamaldehyde, 0.458
      4 mL methyl alcohol,
    51.3 mL H2O
    44.2 mL 31.45% HCl
    0.48 mL cinnamaldehyde (3.79 × 10−3 mol), 0.026
      4 mL methyl alcohol,
      1 mL RAD 1110 ™ (1.4 × 10−3 mol),
    50.3 mL H2O
    44.2 mL 31.45% HCl
    0.48 mL cinnamaldehyde (3.79 × 10−3 mol), 0.047
      4 mL methyl alcohol,
     2.8 mL RAD 1110 ™ (4.2 × 10−3 mol),
    48.5 mL H2O
    44.2 mL 31.45% HCl
    • EXAMPLE 2
  • Amine reaction products of cinnamaldehyde blends were tested for corrosion inhibition of different metals under different conditions. Inhibitor Blend A consisted of 2.5% NaI, 27.75% propylene glycol, 5% 2-ethyl-1-hexanol, 18% mixture of cinnamaldehyde and vinylogated cinnamaldehyde, 7% naphthenic acid ethoxylate [18-20 mols ethoxylate (EO)], 1.75% lauryl alcohol ethoxylate [23 mols EO], and 38% ethanolamine (percents given are weight percents). Blend B consisted of 4.0% NaI, 44.8% propylene glycol, 8.1% 2-ethyl-1-hexanol, 29.0% mixture of cinnamaldehyde, 11.3% naphthenic acid ethoxylate [18-20 mols EO], and 2.8% lauryl alcohol ethoxylate [23 mols EO] (percents given are weight percents). Blend C consisted of 4.0% NaI, 44.8% propylene glycol, 8.1% 2-ethyl-1-hexanol, 29.0% mixture of cinnamaldehyde and vinylogated cinnamaldehyde, 11.3% naphthenic acid ethoxylate [18-20 mols EO], and 2.8% lauryl alcohol ethoxylate [23 mols EO] (percents given are weight percents). Blend D consisted of 2.5% NaI, 27.75% propylene glycol, 5% 2-ethyl-1-hexanol, 18% mixture of cinnamaldehyde and vinylogated cinnamaldehyde, 7% naphthenic acid ethoxylate [18-20 mols EO], 1.75% lauryl alcohol ethoxylate [23 mols EO], and 38% diethanolamine (percents given are weight percents). Blend E consisted of 2.5% NaI, 27.75% propylene glycol, 5% 2-ethyl-1-hexanol, 18% mixture of cinnamaldehyde and vinylogated cinnamaldehyde, 7% naphthenic acide ethoxylate [18-20 mols EO], 1.75% lauryl alcohol ethoxylate [23 mols EO], and 38% triethanolamine (percents given are weight percents). Blend F consists of 3.0% NaI, 33.8% propylene glycol, 6.1% 2-ethyl-1-hexanol, 8.5% naphthenic acid ethoxylate [18-20 mols EO], 2.1% lauryl alcohol ethoxylate [23 mols EO], and 46.3% ethanolamine (percents given are weight percents).
  • The first test in Table II is a blank test showing the loss of metal for an uninhibited acid under the given conditions. Tests 2-6 demonstrate the superior corrosion inhibiting performance of the cinnamaldehyde/vinylogated cinnamaldehyde imine and cinnamaldehyde/vinylogated cinnamaldehyde hemiaminal of diethanolamine compared to unreacted cinnamaldehyde and unreacted vinylogated cinnamaldehyde. Test 7 shows the higher corrosion losses percent when utilizing the tertiary amine triethanolamine in the blend. The last tests demonstrate excellent corrosion inhibition of different metals, specifically N-80, 13Cr 25Cr.
    TABLE II
    Summary of Corrosion Inhibition Test Results
    Corrosion
    Test Concentration Other HCl Temp Time Loss
    No. Blend Used, v/v % Additives Concentration ° F. Hrs Metal (lb/ft2)
    1 No 200 5 J-55 1.514
    Inhibitor
    2 B 1.55 28 200 5 J-55 0.267
    3 C 1.55 28 200 5 J-55 0.705
    4 F 2.1 28 200 5 J-55 0.786
    5 A 2.5 28 200 5 J-55 0.056,
    0.067
    6 D 2.5 28 200 5 J-55 0.061
    7 E 2.5 28 200 5 J-55 0.309
    8 A 2.5 15 + 2% 88% 300 2 N-80 0.056
    formic acid
    9 A 2.5 28 180 4 13 Cr 0.028
    10 A 2.5 0.1% 28 200 6 25 Cr 0.025
    “Losurf400 ™”(1)
    0.3%
    “SGA-11 ™”(2)

    (1,2)Halliburton Energy Services chemicals “Losurf 400 ™” is a de-emulsifier and “SGA-II ™” is a friction reducer.
    • Example 3
  • The next table (Table III) demonstrates cinnamaldehyde reacted with amines, in situ, in 15% HCl at 225° F. containing N-80 steel for 3 hours. The cinnamaldehyde and amine were each added to the test cell along with 4 mL MeOH, followed by the appropriate quantity of water and concentrated HCl to make 100 mL of 15% HCl blend. From Table III, it can be seen that the aldehyde-amine reaction product provides excellent corrosion inhibition.
    TABLE III
    Summary of Weight Loss Corrosion Testing for
    Aldehyde/Amine Reaction Products
    Corrosion Loss
    Aldehyde (3.78 × 10−3 mol) Amine (3.78 × 10−3 mol) (lb/ft2)
    Cinnamaldehyde — 0.168
    — Ethylamine 0.461
    — Diethyalmine 0.307
    Cinnamaldehyde Ethylamine 0.033
    Cinnamaldehyde Diethylamine 0.036
    — Ethanolamine 0.491
    — Diethanolamine 0.511
    Cinnamaldehyde Ethanolamine 0.019
    Cinnamaldehyde Diethanolamine 0.038
    Cinnamaldehyde Triethanolamine 0.185
    • Example 4
  • The next table (Table IV) demonstrates the ketone/amine reaction of this invention in 15% HCl at 225° F. containing N-80 steel for 3 hours. Each ketone/amine reaction product was made by refluxing the ketone and amine in a 1:1 molar ratio in MeOH for the 4-Phenyl-3-buten-2-one, or acetone for the chalcone, for several hours. The ketone/amine reaction products were each added to the test cell along with 4 mL MeOH, followed by the appropriate quantity of water and concentrated HCl to make 100 mL of 15% HCl blend. From Table IV, it can be seen that the ketone/amine reaction product provides excellent corrosion inhibition.
    TABLE IV
    Summary of Weight Loss Corrosion Testing for
    Ketone/Amine Reaction Products
    Inhibitor molecule (3.78 × 10−3 mol) Corrosion Loss (lb/ft2)
    4-Phenyl-3-buten-2-one 0.291
    4-Phenyl-3-buten-2-one/ethanolamine 0.012
    4-Phenyl-3-buten-2-one/diethanolamine 0.029
    4-Phenyl-3-buten-2-one/triethanolamine 0.254
    Chalcone 0.519
    Chalcone/ethanolamine 0.009
    Chalcone/diethanolamine 0.015
    • EXAMPLE 5
  • Table V demonstrates 3,7-dimethyl-2,6-octadienal reacted with ethanolamine and added to 15% HCl at 225° F. containing N-80 steel for 3 hours. The 3,7-dimethyl-2,6-octadienal and amine were each added to the test cell along with 4 mL MeOH, followed by the appropriate quantity of water and concentrated HCl to make 100 mL of 15% HCl blend. From Table V, it can be seen that the aldehyde/amine reaction product provides excellent corrosion inhibition.
    TABLE V
    Summary of Weight Loss Corrosion Testing for
    Aldehyde/Amine Reaction Products
    Corrosion Loss
    Aldehyde (3.78 × 10−3 mol) Amine (3.78 × 10−3 mol) (lb/ft2)
    3,7-dimethyl-2,6-octadienal — 0.571
    3,7-dimethyl-2,6-octadienal ethanolamine 0.081
  • Thus, the present invention is well adapted to attain the objects and advantages mentioned as well as those that are inherent therein. While numerous changes may be made by those skilled in the art, such changes are encompassed within the spirit of this invention as defined by the appended claims.

Claims (24)

1. A method of inhibiting the corrosion of metal surfaces contacted by an aqueous acid solution comprising:
(a) combining a corrosion inhibiting composition with said aqueous acid solution, said corrosion inhibiting composition comprising the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine; and then
(b) contacting said metal surfaces with said aqueous acid solution containing said reaction product.
2. The method claim 1 wherein said alpha,beta-unsaturated aldehyde or ketone and said primary or secondary amine are separately added to water used to form said aqueous acid solution wherein said alpha,beta-unsaturated aldehyde or ketone and said primary or secondary amine react and form said corrosion inhibiting reaction product therein.
3. The method of claim 1 wherein said metal surfaces comprise metals selected from the group consisting of J55 steel, N-80 steel, 13Cr alloy, 25 Cr alloy, Incoloy 825 and 316L.
4. The method of claim 1 wherein said alpha,beta-unsaturated aldehyde is selected from the group consisting of: crotonaldehyde, 2-hexenal; 2-heptenal, 2-octenal; 2-nonenal, 2-decenal, 2-undecenal, 2-dodecenal, 2,4-hexadienal, 2,4-heptadienal, 2,4-octadienal, 2,4-nonadienal, 2,4-decadienal, 2,4-undecadienal, 2,4-dodecadienal, 2,6-dodecadienal, citral; 1-formyl-[2-(2-methylvinyl)]-2-n-octylethylene, cinnamaldehyde, dicinnamaldehyde, p-hydroxycinnamaldehyde, p-methylcinnamaldehyde, p-ethylcinnamaldehyde, p-methoxycinnamaldehyde, p-dimethylaminocinnamaldehyde, p-diethylaminocinnamaldehyde, p-methoxycinnamaldehyde, p-dimethylaminocinnamaldehyde, p-diethylaminocinnamaldehyde, p-nitrocinnamaldehyde, o-nitrocinnamaldehyde, o-allyloxycinnamaldehyde, 4-(3-propenal)cinnamaldehyde, p-sodium sulfocinnamaldehyde, p-trimethylammoniumcinnamaldehyde sulfate, p-trimethylammoniumcinnamaldehyde o-methylsulfate, p-thiocyanocinnamaldehyde, p-(S-acetyl)thiocinnamaldehyde, p-(S-N,N-dimethylcarbamoylthio)cinnamaldehyde, p-chlorocinnamaldehyde, 5-phenyl-2,4-pentadienal, 7-phenyl-2,4,6-heptatrienal, 5-(p-methoxyphenyl)-2,4-pentadienal; 2,3-diphenylacrolein, 3,3-diphenylacrolein, α-methylcinnamaldehyde, β-methylcinnamaldehyde, α-chlorocinnamaldehyde, α-bromocinnamaldehyde, α-butylcinnamaldehyde, α-amylcinnamaldehyde, α-hexylcinnamaldehyde; 2-(p-methylbenzylidine)decanal, α-bromo-p-cyanocinnamaldehyde, α-ethyl-p-methylcinnamaldehyde, p-methyl-α-pentylcinnamaldehyde, 3,4-dimethoxy-α-methylcinnamaldehyde, α-[(4-methylphenyl)methylene]benzeneacetaldehyde, α-(hydroxymethylene)-4-methylbenzylacetaldehyde, 4-chloro-α-(hydroxymethylene)benzeneacetaldehyde, α-nonylidenebenzeneacetaldehyde, 3,7-dimethyl-2,6-octadienal, and beta-hydroxy aldehydes which dehydrate to form alpha,beta-unsaturated aldehydes under acidic conditions; and said alpha,beta-unsaturated ketones are selected from the group consisting of: 4-phenyl-3-buten-2-one, 3-methyl-1-phenyl-2-buten-1-one; 4-phenyl-3-penten-2-one; 5-phenyl-4-penten-3-one; 6-phenyl-5-hexen-4-one; 7-phenyl-6-hepten-4-one-2-ol; 7-phenyl-6-hepten-4-one; 1,3-diphenyl-2-propen-1-one; 1,3-diphenyl-2-buten-1-one; dicinnamalacetone; 1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione mesityl oxide; phorone; isophorone; 3-methyl-2-cyclohexen-1-one; 3,6-dimethyl-2,6-cycloheptadien-1-one; 5-methyl-4-hexen-3-one; and beta-hydroxy ketones which dehydrate to form alpha,beta-unsaturated ketones under acidic conditions.
5. The method of claim 1 wherein said primary or secondary amine is selected from the group consisting of ethanolamine, diethanolamine, partially ethoxylated dehydroabietylamine, ethylamine, diethylamine, dehydroabietylamine, propylamine, dipropylamine, propanolamine, isopropanolamine, 2-propanol-1-amine, diisopropanolamine, butylamine, dibutylamine, tert-butylamine, pentylamine, dipentylamine and tert-benzyl-tert-butylamine.
6. The method of claim 1 wherein said reaction product results from the reaction of said primary or secondary amine with said alpha,beta-unsaturated aldehyde or ketone at a molar ratio of amine to aldehyde or ketone in the range of from about 0.1:1 to about 4:1.
7. The method of claim 1 wherein said corrosion inhibiting composition is combined with said aqueous acid solution in an amount in the range of from about 0.01% to about 5% by weight of said aqueous acid fluid.
8. The method of claim 1 wherein said corrosion inhibiting composition further comprises one or more of an iodide source, a solvent or a surfactant.
9. The method of claim 1 wherein said aqueous solution comprises water and an acid selected from the group consisting of hydrochloric acid, acetic acid, formic acid, hydrofluoric acid and mixtures thereof.
10. The method of claim 1 wherein said aqueous acid solution comprises water and hydrochloric acid, said hydrochloric acid being present in an amount in the range of from about 5% to about 28% by weight of aqueous acid fluid.
11. The method of claim 1 which further comprises contacting said metal surfaces with said aqueous acid solution at temperatures up to about 300° F. when said aqueous acid solution comprises hydrochloric acid at a concentration of about 15% by weight thereof.
12. The method of claim 1 which further comprises contacting said metal surfaces with said aqueous acid fluid at temperatures up to about 225° F. when said aqueous acid solution comprises hydrochloric acid at a concentration of about 28% by weight thereof.
13. A corrosion inhibiting composition for inhibiting the corrosion of metal surfaces by an aqueous acid solution when the composition is added to the aqueous acid solution comprising the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine.
14. The corrosion inhibiting composition of claim 13 wherein said alpha,beta-unsaturated aldehyde is selected from the group consisting of: crotonaldehyde, 2-hexenal; 2-heptenal, 2-octenal; 2-nonenal, 2-decenal, 2-undecenal, 2-dodecenal, 2,4-hexadienal, 2,4-heptadienal, 2,4-octadienal, 2,4-nonadienal, 2,4-decadienal, 2,4-undecadienal, 2,4-dodecadienal, 2,6-dodecadienal, citral; 1-formyl-[2-(2-methylvinyl)]-2-n-octylethylene, cinnamaldehyde, dicinnamaldehyde, p-hydroxycinnamaldehyde, p-methylcinnamaldehyde, p-ethylcinnamaldehyde, p-methoxycinnamaldehyde, p-dimethylaminocinnamaldehyde, p-diethylaminocinnamaldehyde, p-nitrocinnamaldehyde, o-nitrocinnamaldehyde, o-allyloxycinnamaldehyde, 4-(3-propenal)cinnamaldehyde, p-sodium sulfocinnamaldehyde, p-trimethylammoniumcinnamaldehyde sulfate, p-trimethylammoniumcinnamaldehyde o-methylsulfate, p-thiocyanocinnamaldehyde, p-(S-acetyl)thiocinnamaldehyde, p-(S-N,N-dimethylcarbamoylthio)cinnamaldehyde, p-chlorocinnamaldehyde, 5-phenyl-2,4-pentadienal, 7-phenyl-2,4,6-heptatrienal, 5-(p-methoxyphenyl)-2,4-pentadienal; 2,3-diphenylacrolein, 3,3-diphenylacrolein , α-methylcinnamaldehyde, β-methylcinnamaldehyde, α-chlorocinnamaldehyde, α-bromocinnamaldehyde, α-butylcinnamaldehyde, α-amylcinnamaldehyde, α-hexylcinnamaldehyde; 2-(p-methylbenzylidine)decanal, α-bromo-p-cyanocinnamaldehyde, α-ethyl-p-methylcinnamaldehyde, p-methyl-α-pentylcinnamaldehyde, 3,4-dimethoxy-α-methylcinnamaldehyde, α-[(4-methylphenyl)methylene]benzeneacetaldehyde, α-(hydroxymethylene)-4-methylbenzylacetaldehyde, 4-chloro-α-(hydroxymethylene)benzeneacetaldehyde, α-nonylidenebenzeneacetaldehyde, and 3,7-dimethyl-2,6-octadienal and beta-hydroxy aldehydes which dehydrate to form alpha,beta-unsaturated aldehydes under acidic conditions; said alpha,beta-unsaturated ketone is selected from the group consisting of: 4-phenyl-3-buten-2-one, 3-methyl-1-phenyl-2-buten-1-one; 4-phenyl-3-penten-2-one; 5-phenyl-4-penten-3-one; 6-phenyl-5-hexen-4-one; 7-phenyl-6-hepten-4-one-2-ol; 7-phenyl-6-hepten-4-one; 1,3-diphenyl-2-propen-1-one; 1,3-dephenyl-2-buten-1-one; dicinnamalacetone; 1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione, mesityl oxide; phorone; isophorone; 3-methyl-2-cyclohexen-1-one; 3,6-dimethyl-2,6-cycloheptadien-1-one; 5-methyl-4-hexen-3-one; and beta-hydroxy aldehydes or ketones which dehydrate to form the alpha,beta-unsaturated aldehydes or ketones under acidic conditions.
15. The corrosion inhibiting composition of claim 13 wherein said primary or secondary amines are selected from the group consisting of ethanolamine, diethanolamine, partially ethoxylated dehydrobietylamine, ethylamine, diethylamine, dehydroabietylamine, propylamine, dipropylamine, propanolamine, isopropanolamine, 2-propanol-1-amine, diisopropanolamine, butylamine, dibutylamine, tert-butylamine, pentylamine, dipentylamine and tert-benzyl-tert-butylamine.
16. The corrosion inhibiting composition of claim 13 wherein said reaction product results from the reaction of said alpha,beta-unsaturated aldehyde or ketone with said primary or secondary amine at a molar ratio of amine to aldehyde or ketone in the range of from about 0.1:1 to about 4:1.
17. The corrosion inhibiting composition of claim 13 which further comprises one or more of an iodide source, a solvent or a surfactant.
18. A metal corrosion inhibited aqueous acid composition comprising:
water;
an acid selected from the group consisting of hydrochloric acid, acetic acid, formic acid, hydrofluoric acid and mixtures thereof; and
a corrosion inhibiting composition comprising the reaction product of an alpha,beta-unsaturated aldehyde or ketone with a primary or secondary amine.
19. The aqueous acid composition of claim 18 wherein said acid is hydrochloric acid and is present in said composition in an amount in the range of from about 5% to about 28% by weight of said water.
20. The aqueous acid composition of claim 18 wherein said alpha,beta-unsaturated aldehyde is selected from the group consisting of: crotonaldehyde, 2-hexenal; 2-heptenal, 2-octenal; 2-nonenal, 2-decenal, 2-undecenal, 2-dodecenal, 2,4-hexadienal, 2,4-heptadienal, 2,4-octadienal, 2,4-nonadienal, 2,4-decadienal, 2,4-undecadienal, 2,4-dodecadienal, 2,6-dodecadienal, citral; 1-formyl-[2-(2-methylvinyl)]-2-n-octylethylene, cinnamaldehyde, dicinnamaldehyde, p-hydroxycinnamaldehyde, p-methylcinnamaldehyde, p-ethylcinnamaldehyde, p-methoxycinnamaldehyde, p-dimethylaminocinnamaldehyde, p-diethylaminocinnamaldehyde, p-nitrocinnamaldehyde, o-nitrocinnamaldehyde, o-allyloxycinnamaldehyde, 4-(3-propenal)cinnamaldehyde, p-sodium sulfocinnamaldehyde, p-trimethylammoniumcinnamaldehyde sulfate, p-trimethylammoniumcinnamaldehyde o-methylsulfate, p-thiocyanocinnamaldehyde, p-(S-acetyl)thiocinnamaldehyde, p-(S-N,N-dimethylcarbamoylthio)cinnamaldehyde, p-chlorocinnamaldehyde, 5-phenyl-2,4-pentadienal, 7-phenyl-2,4,6-heptatrienal, 5-(p-methoxyphenyl)-2,4-pentadienal; 2,3-diphenylacrolein, 3,3-diphenylacrolein, α-methylcinnamaldehyde, β-methylcinnamaldehyde, α-chlorocinnamaldehyde, α-bromocinnamaldehyde, α-butylcinnamaldehyde, α-amylcinnamaldehyde, α-hexylcinnamaldehyde; 2-(p-methylbenzylidine)decanal, α-bromo-p-cyanocinnamaldehyde, α-ethyl-p-methylcinnamaldehyde, p-methyl-α-pentylcinnamaldehyde, 3,4-dimethoxy-α-methylcinnamaldehyde, α-[(4-methylphenyl)methylene]benzeneacetaldehyde, α-(hydroxymethylene)-4-methylbenzylacetaldehyde, 4-chloro-α-(hydroxymethylene)benzeneacetaldehyde, α-nonylidenebenzeneacetaldehyde, and 3,7-dimethyl-2,6-octadienal and beta-hydroxy aldehydes which dehydrate to form alpha,beta-unsaturated aldehydes under acidic conditions; and said alpha,beta-unsaturated ketone is selected from the group consisting of: 4-phenyl-3-buten-2-one, 3-methyl-1-phenyl-2-buten-1-one; 4-phenyl-3-penten-2-one; 5-phenyl-4-penten-3-one; 6-phenyl-5-hexen-4-one; 7-phenyl-6-hepten-4-one-2-ol; 7-phenyl-6-hepten-4-one; 1,3-diphenyl-2-propen-1-one; 1,3-dephenyl-2-buten-1-one; dicinnamalacetone; 1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione mesityl oxide; phorone; isophorone; 3-methyl-2-cyclohexen-1-one; 3,6-dimethyl-2,6-cycloheptadien-1-one; 5-methyl-4-hexen-3-one; and beta-hydroxy ketones which dehydrate to form the alpha,beta-unsaturated ketones under acidic conditions.
21. The aqueous acid composition of claim 18 wherein said primary or secondary amine is selected from the group consisting of ethanolamine, diethanolamine, partially ethoxylated dehydrobietylamine, ethylamine, diethylamine, dehydroabietylamine, propylamine, dipropylamine, propanolamine, isopropanolamine, 2-propanol-1-amine, diisopropanolamine, butylamine, dibutylamine, tert-butylamine, pentylamine, dipentylamine and tert-benzyl-tert-butylamine.
22. The aqueous acid composition of claim 18 wherein said reaction product results from reaction of said primary or secondary amine with said alpha,beta-unsaturated aldehyde or ketone at a molar ratio of amine to aldehyde or ketone in the range of from about 0.1:1 to about 4:1.
23. The aqueous acid composition of claim 18 wherein said corrosion inhibiting composition is present in said composition in an amount in the range of from about 0.01% to about 5% by volume of aqueous acid fluid.
24. The aqueous acid composition of claim 18 which further comprises one or more of an iodide source, a solvent or a surfactant.
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