CN1270997A - Lubricating oil composition - Google Patents

Abstract

A lubricating oil composition for a marine diesel engine comprises a major amount of an oil of lubricating viscosity and minor amounts of (a) an oil-soluble ashless dispersant (b) an oil-soluble overbased metal detergent whose surfactant system is derived from one or more surfactants, said one surfactant being a salicylate, such as at least two different surfactants; and (c1) a first oil-soluble anti-oxidant being sulfur-containing or phenolic or both, and/or (c2) an oil-soluble aromatic amine anti-oxidant.

Description

Lubricating oil composition

The present invention relates to a kind of marine lubricant composition, in particular as the marine diesel lubricant of crosshead engine and trunk engine, to improve the performance that anti-in use viscosity increases.

Term " peculiar to vessel " does not limit the engine that is used in marine equipment with engine; As understood by one of ordinary skill in the art, it comprises the continental rise h type engine h of the above-mentioned type, for example is used to the engine that generates electricity.

The lubricating oil that is used in crosshead engine and trunk engine is known, and knows in order to improve its operating performance and comprise that also ashless dispersant and high alkaline detergent are as additive.International Patent Application PCT/EP97/0269 the purification agent in these are used has been described and comprise salicylate tensio-active agent.

But using the problem of the lubricant that contains these purification agents is owing to the reason that comprises oxidative degradation makes its viscosity along with the increase of time increases.In fact, viscosity can be increased to the degree that makes engine production producer can not accept this lubricant, therefore is not suitable for its purposes.The present invention uses the antioxidant of several qualifications just to solve this problem in lubricant; Be surprised to find: use them can guarantee that it during this period of time has acceptable stable lubricant viscosity in the intended life of lubricant, in use, the stable increase of viscosity normally can reckon with.

Therefore, first aspect of the present invention is a kind of lubricating oil composition that is used for marine diesel engine, and it comprises the oil and a spot of following additives of mixing mutually with it or adding wherein of the lubricant viscosity of main amount:

(a) oil soluble ashless dispersant;

(b) oil soluble high alkaline metal detergent, its surfactant system comes from one or more tensio-active agents, at least two kinds of different tensio-active agents for example, said a kind of tensio-active agent be salicylate and:

(c1) first kind of sulfur-bearing or phenols or the two oil-soluble inhibitor that all has, or

(c2) oil soluble aromatic amine antioxidant, or (c1) and (c2),

The TBN of said composition is at least 10, and for example at least 20, the viscosity index at least 90 of composition, preferably at least 100, more preferably at least 105.

Second aspect of the present invention is to use one or both as the defined additive (a) and (b) of first aspect present invention and (c1) and (c2), the performance that increases with the viscosity that improves the durable lubricating oil composition that comprises these additives in marine diesel engine.

The 3rd aspect of the present invention is the method for lubricated marine diesel engine such as trunk engine, and it is included in the lubricating oil composition that uses in the engine according to first aspect present invention.

The meaning of " main amount " is 50 quality % greater than composition.

The meaning of " on a small quantity " is 50 quality % less than composition, the additive that this had not only referred in the composition to be mentioned but also refer to that all are present in the total mass percentage ratio of the additive in the composition, and it is to calculate by single activeconstituents of planting additive or multiple additives.

" include or contain " or similar speech is used for limiting the existence of the feature mentioned, step, overall or component, wherein also do not have one or more other feature, step, overall, component or combination but do not get rid of.

" TBN " (total basicnumber) is to measure with ASTM D2896, and viscosity index is defined by ASTM D2270.

Below feature of the present invention is described in detail now. Marine diesel engine

Lubricating oil composition of the present invention is applicable to that machine speed is 100-1,500rpm, and as 300-1, the brake power (BHP) of 000rpm and each cylinder is 50-3,000, be preferably 100-2,000 4 stroke trunk engines.Engine can also be that machine speed is 40-200rpm, is 500-10 as the BHP of 60-120rpm and each cylinder, 000 2 stroke crosshead engines.Engine is preferably trunk engine. Lubricant compositions

Preferably, the TBN of lubricant compositions is 20 at least, for example is 20-100, again 30-70 for example.Preferably, the viscosity index of lubricant compositions is 90 at least, for example is 95 at least, is 110 especially at least.

For example, the kinematic viscosity of lubricant compositions in the time of 100 ℃ is 10mm at least ²s ^-1(measuring with ASTM D445) is preferably 12mm at least ²s ^-1, 13-30mm more preferably ²s ^-1, 13-25mm for example ²s ^-1 Lubricating oil

The oil of lubricant viscosity (being sometimes referred to as lubricating oil) can be the oil that is suitable for lubricated crosshead engine or trunk engine arbitrarily.Lubricating oil can be animal oil, vegetables oil or mineral oil.Proper lubrication oil is the lubricating oil of petroleum derivation, for example naphthene base crude oil, paraffinic based oil or mixing base oil.In addition, lubricating oil can be ucon oil.Suitable ucon oil comprises synthetic ester oil grease, and this oil comprises that diester is as two-octyl group adipic acid ester, two-octyl group sebate and three-decyl adipic acid ester or polymeric hydrocarbon lubricating oil such as liquid polyisobutene and poly-alpha olefins.The general mineral oil that uses.This lubricating oil generally can be greater than 60% of composition quality, and typically greater than 70%, and its kinematic viscosity in the time of 100 ℃ is 2-40mm generally speaking ²s ^-1, 3-15mm for example ²s ^-1, and viscosity index is 80-100, for example 90-95.

Another kind of lubricating oil is hydrocrackates, and it is under the condition that high temperature, middle pressure and hydrogen exist middle runnings and last running to be obtained further the decomposition in refining process.The kinematic viscosity of general hydrocrackates in the time of 100 ℃ is 2-40mm ²s ^-1, 3-15mm for example ³s ^-1, and viscosity index generally is 100-110, for example 105-108.

Term used herein " bright stock " refers to vacuum residuum through solvent extraction, deasphalting base oil, and its kinematic viscosity in the time of 100 ℃ is 28-36mm generally speaking ²s ^-1, its general usage quantity based on composition quality is less than 30%, preferably less than 20%, is more preferably less than 15%, most preferably less than 10%, for example less than 5%. (a) ashless dispersant

Dispersion agent is a kind of additive that is used for lubricating composition, and its primary effect is to make solid and liquid impurity be in suspended state, with its passivation, reduces mud deposit with this when reducing engine deposits.Like this, in the lubricant use, for example a kind of dispersion agent makes because the oil-insoluble substance that causes of oxidation keeps suspended state, so just can prevent that mud from flocculating and precipitate or be deposited on the metal parts of engine.

The meaning of " ashless " is that dispersion agent is non-metallo organic material, and it does not form ash basically when burning, and on the contrary, metallic material forms ash.Ashless dispersant includes the long chain hydrocarbon of polar end, and polarity for example contains O, P because of it or the N atom produces.This hydrocarbon is that oil-soluble oleophilic group if any 40-500 carbon atom is arranged.Therefore, ashless dispersant can comprise have can with the oil soluble polymeric hydrocarbon skeleton of the functional group that wants divided particles to combine.General these dispersion agents comprise it usually being amine, alcohol, acid amides or the ester polarity part of utilizing bridge linkage group and polymer backbone to connect mutually.For example, ashless dispersant can be to be selected from the list of long chain hydrocarbon replacement and oil soluble salt, ester, amino ester, acid amides, imide He the oxazoline of dicarboxylic acid or its acid anhydride; The carbothioic acid ester radical derivative of long chain hydrocarbon; Have polyamine directly connection thereon the long-chain fat hydrocarbon and as US-A-3, the Manny phase condensed products that long-chain substituted phenol and formaldehyde and polyalkylene polyamine condensation are obtained described in 442,808.

Oil soluble polymeric hydrocarbon skeleton generally is olefin polymer or polyene, especially contains the C of main molar weight (that is: greater than 50mol%) ₂-C ₁₈Alkene (for example ethene, propylene, butylene, iso-butylene, amylene, octene-1, vinylbenzene), generally be C ₂-C ₅The polymkeric substance of alkene.Oil soluble polymeric hydrocarbon skeleton can be the multipolymer (as ethene and the multipolymer of alpha-olefin such as propylene or butylene or the multipolymer of two kinds of different alpha-olefins) of homopolymer (as polypropylene or polyisobutene) or two or more these alkene.Other multipolymer comprises that those polymer monomers that few molar weight such as 1-10mol% are wherein arranged are α, and ω-diolefin series is as C ₃-C ₁₂The multipolymer (as the multipolymer of iso-butylene and divinyl or ethene, propylene and 1, the multipolymer of 4-hexadiene or 5-ethylidene-2-norbornene) of non-conjugated diene hydrocarbon.The general Mn that describes among the EP-A-490454 is that the irregular propylene oligomer of 700-5000 and heteropolymer such as polyepoxide also can use.

A preferred class hydrocarbon polymer is a polybutene, and particularly polyisobutene (PIB) or poly--n-butene for example can be by C ₄The refinery steams polymerization prepares.Olefin polymer preferred another kind of is ethylene ' alpha '-olefin (EAO) multipolymer and as alpha-olefin homo and multipolymer described in the WO-94/13709, the terminal vinylidene degree of unsaturation that height (as＞30%) is all arranged in these two, this can functionalization and amination generation dispersion agent.

For example, dispersion agent comprises the derivative of the carboxylic acid that long chain hydrocarbon replaces, and example is the derivative of the Succinic Acid of high molecular alkyl replacement.One group of noticeable dispersion agent is the succimide that hydrocarbon replaces, and for example, it is by above-mentioned acid (or derivative) and nitrogenous compound, and advantageously the polyolefine polyamine reacts as polyethylenepolyamine and obtains.Especially be preferably as US-A-3 202,678;-3,154,560;-3,172,892;-3,024,195;-3,024,237;-3,219,666;-3,216,936 and BE-A-66, the polyolefine polyamine described in 875 and the reaction product of enetutanedioic acid anhydride can be through aftertreatment to improve its performance, for example boronation (as US-A-3,087,936 and-3, described in 254,025), fluoridize and oxidation.For example, can contain the dispersion agent of acyl group nitrogen to carry out boronation with the boride processing that is selected from boron oxide, halogenation boron, boric acid and boric acid ester. (b) high alkaline metal detergent

Purification agent is a kind of additive that reduces piston deposit in the engine such as high temperature varnish and the sedimental formation of jaqan; Usually it has sour neutrality, can make finely divided solids be in suspended state.Most of purification agents are based on metal " soap ", promptly are the metal-salts of acidic organic compound, are sometimes referred to as tensio-active agent.

Purification agent generally comprises a polar end that long hydrophobic tail base is arranged, and this polar end comprises the metal-salt of acidic organic compound.By make excessive metallic compound such as its oxide compound or oxyhydroxide and sour gas such as carbon dioxide reaction obtain containing in and the high alkaline detergent of purification agent comprise a large amount of metal base, in and purification agent as metal base (as carbonate) micellar skin.The TBN of high alkaline detergent of the present invention is 200 at least, preferably at least 250, particularly at least 300, and for example can be up to 600.

The available tensio-active agent comprises sulfonate, phenates, sulfuration phenates, thio-phosphonates and naphthenate and other oil soluble carboxylate salt except outside the salicylate.Be preferably the sulfuration phenates.Metal can be basic metal or alkaline-earth metal, as sodium, potassium, lithium, calcium and magnesium.Be preferably calcium.

The tensio-active agent that is used for the surfactant system of high alkalinity metal compound preferably contains at least one alkyl, for example, on aromatic ring as a substituting group.Terminology used here " alkyl " at first refers to and comprises hydrogen and carbon atom and be attached to the other parts of molecule with carbon atom, but does not get rid of other atom or group exists in certain proportion, and this ratio is not enough to weaken the fundamental property of alkyl.Advantageously, the alkyl in the tensio-active agent used in this invention is a fatty group, preferred alkyl or thiazolinyl, particularly alkyl, its can be straight chain or side chain.The total number of carbon atoms in the tensio-active agent should be enough to give required oil soluble at least.

The used salicylate tensio-active agent of the present invention can be unvulcanized or sulfurized, can also be chemical modification and/or contain other substituting group, example is the substituting group of phenates as discussed below.Can also use and the following similar methods sulfuration alkyl substituted salicylic acid of discussing, this is known to those skilled in the art.Whitfield's ointment generally carries out carboxylation preparation by Cole cypress-Schmidt (Kolbe-Schmitt) method with phenoxide, in this case, will obtain usually and the phenol of carboxylation not blended mixture (common form with diluent) mutually.

Salicylate among the present invention can obtain from oil-soluble Whitfield's ointment, and the substituting group on this oil soluble Whitfield's ointment is preferably those with the substituting group of representing with R in the following phenol of being discussed.Advantageously, in the alkyl substituted salicylic acid, alkyl contains 5-100 carbon atom, preferred 9-30 carbon atom, particularly 14-20 carbon atom.

The used phenates tensio-active agent of the present invention can be not have sulfurized, but preferred sulfurized.In addition, phenates comprise contain surpass a hydroxyl (for example, from the alkyl pyrocatechol) or condense aromatic nucleus (as alkyl naphthol) those and by those of chemical reaction such as alkylidene group bridging and mannich base condensation and saligenol type (under alkaline condition by phenol and aldehyde reaction preparation) modification.

The phenates tensio-active agent based on phenol be preferably and obtain from following formula I:

R wherein represents alkyl, and y represents 1-4.When y greater than 1 the time, alkyl can be the same or different.

Phenol normally uses with sulphided state.Sulfurized alkyl phenol generally can be represented with Formula Il:

X wherein generally is 1-4.In some cases, can connect above two phenol molecules with the Sx bridged bond.

In following formula, the alkyl of representing with R is alkyl advantageously, and it advantageously contains 5-100 carbon atom, preferred 5-40 carbon atom, particularly 9-12 carbon atom is in all R groups, average carbon atom number at least approximately is 9, to guarantee it enough solvabilities is arranged in oil.Preferred alkyl is nonyl (three propylidene).

For convenience, in the following discussion the alkyl fortified phenol is called alkylphenol.

The vulcanizing agent that is used for preparing sulfuration phenol or phenates can be can-(S) the x-abutment is led compound arbitrarily or the element in the alkylphenol monomeric groups into, x wherein generally is 1 to about 4.Therefore, reaction can be carried out with elementary sulfur or its halogenide, for example sulfur dichloride, or more preferably single sulfur subchloride.If the use elementary sulfur, by with alkyl phenol compound 50-250 ℃ of heating, preferably at least 100 ℃ of heating, vulcanization reaction is worked.Use the general mixture of x-of aforesaid abutment-(S) that produces of elementary sulfur.If use halogenation sulphur, by with alkylphenol at-10-120 ℃, be preferably at least 60 ℃ and handle down, vulcanization reaction is worked.Reaction can be carried out in the presence of suitable diluent.Advantageously, diluent comprises it being the organic diluent of inert, for example mineral oil or alkane basically.In all cases, reaction all is to carry out in time enough, to carry out basic reaction.Generally be preferably the alkylphenol material that uses 0.1-5mol whenever the amount vulcanizing agent.

If, wish to use basic catalyst as vulcanizing agent with elementary sulfur, for example sodium hydroxide or organic amine are preferably heterocyclic amine (as morpholine).

The details of sulfuration method is known to those skilled in the art.

No matter how prepare, the sulphurized alkyl phenols that is used to prepare the high alkalinity metal compound generally includes diluent and unreacted alkylphenol and contains 2-20% based on the sulphurized alkyl phenols quality usually, preferred 4-14%, the most preferably sulphur of 6-12%.

As noted above, terminology used here " phenol " comprises by phenol and the mannich base condensation phenol of chemical reaction usefulness as the aldehyde modification.

The used aldehyde of Pyrogentisinic Acid's modification comprises as formaldehyde, propionic aldehyde and butyraldehyde.Preferred aldehyde is formaldehyde.The aldehyde modified phenol that is suitable for is described in as US-A-5 259 967 to some extent.

Mannich base condensation phenol makes phenol, aldehyde and amine prepared in reaction.The example of suitable mannich base condensation phenol is described in GB-A-2 121 432 to some extent.

Generally speaking, phenol can comprise the substituting group except that top those that refer to, as long as the not obvious surfactant properties that weakens phenol of these substituting groups.Substituent example like this is methoxyl group and halogen atom.

For example, purification agent can be a kind of complex compound that comprises the high alkalinity mixture of calcium sulfenyl phenolate and alkyl sodium salicylate, as a kind of mixing material that in the high alkalinity process phenates and salicylate surface active groups is combined.

The object lesson of mixing material comprises:

I) comprise the high alkalinity calcium purification agent of surfactant system, tensio-active agent can from and be preferably from least two kinds of tensio-active agents and obtain, wherein at least a is the phenol or derivatives thereof, another in other words wherein at least a tensio-active agent be not the phenol tensio-active agent, so the mass percent of said phenol is at least 10% in the surfactant system of place mensuration, and the TBN of this high alkaline detergent: the % tensio-active agent is at least 10 than (as following definition).

With TBN: the % tensio-active agent is than irrelevant, and in surfactant system, the mass ratio of phenol is at least 20%, is preferably at least 40%, more preferably at least 45%, 50-90% for example.Irrelevant with the phenol ratio, TBN: % tensio-active agent ratio is at least 11, preferably at least 14, more preferably at least 16, advantageously at least 16, particularly at least 19, more particularly at least 21, for example at least 25, and for example up to 30 or more, or up to 40 or more.

The high alkalinity calcium purification agent that ii) comprises surfactant system, tensio-active agent can from and be preferably from least two kinds of tensio-active agents and obtain, wherein at least a is the Whitfield's ointment or derivatives thereof, another in other words wherein at least a tensio-active agent be not the Whitfield's ointment tensio-active agent, so said salicylic mass percent is at least 10% in the surfactant system of place mensuration, and the TBN of this high alkaline detergent: the % tensio-active agent is at least 10 than (as following definition).

Be independent of TBN: % tensio-active agent ratio, salicylic mass ratio is at least 20% in tensio-active agent, preferably at least 30%, more preferably at least 45%, 50-90% for example.Irrelevant with the Whitfield's ointment ratio, TBN: % tensio-active agent ratio is at least 11, preferably at least 14, more preferably at least 16, advantageously at least 18, particularly at least 19, more particularly at least 21, for example at least 25, and for example up to 30 or more, or up to 40 or more.

The high alkalinity calcium purification agent that iii) comprises surfactant system, surfactant system can from and be preferably from phenol and sulfonic acid and obtain, in the tensio-active agent, the mass percent of phenol and sulfonic acid, what so the place was measured is 15 like that: 85%-95: 15; Preferred 30: 70-70: 30; Especially 40: 60-60: 40; TBN: the % tensio-active agent is at least 15 than (as following definition), preferably at least 17, particularly 19 or more.

The high alkalinity calcium purification agent that iv) comprises surfactant system, surfactant system can from and be preferably from phenol, Whitfield's ointment and sulfonic acid and obtain, in the surfactant system, that the mass ratio of phenol and Whitfield's ointment and sulfonic acid place like this is measured is 5-90% like that: 5-90%: 20-80%; Preferred 20-80%: 20-80%: 10-50%; More preferably 30-50%: 25-50%: 15-35%; TBN: the % tensio-active agent is at least 10 than (as following definition), preferably at least 12, particularly 14 or more.

Preferably, the TBN of mixing material is at least 330, for example at least 350, more preferably at least 400, and 400-600 most preferably for example can be up to 500.

Usually, the mass percent that accounts for composition based on the amount of the high alkalinity metal compound of activeconstituents in the lubricant compositions is at least 0.5%, 0.5-20% in particular, and 2-12% for example is as 2-7%.

In high alkalinity calcium purification agent the percentage composition of tensio-active agent and in surfactant system single percentage composition of planting tensio-active agent such as phenol be the percentage ratio of measuring out in the following method. 1. the dialysis of high alkaline detergent

Use the liquid high alkalinity calcium purification agent compound (lubricating oil additive that basically do not conform to other) of hexane in Suo Gelite extractor (Soxhlet extractor) (150mm height * 75mm internal diameter) lining by film with 3-4 speed siphon doubly per hour 20 hours dialysis known quantity (Ag is approximately 20g).This film should be held back all metallic materials substantially, and the other parts of sample are all passed through basically.An example of suitable film is Carters Products, Division of Carter WallaceInc., and New York, NY 10105 provides, the natural rubber film of commodity Trojans by name.The dialyzate and the residue that obtain after dialysis step is finished are evaporated to drying, in vacuum chamber (100 ℃, less than 1 torr or less than about 130Pa) all remaining volatile matter are removed.The exsiccant residuum is expressed as B in gram.The percentage ratio of high alkaline detergent material (C) provides with following formula in the liquid sample: $C=\frac{B}{A}\×100\%$

Amos, R. and Albaugh, E.W. exists " Chromatography in PetroleumAnalysis ", Altgelt, K.H. and Gouw, T.H., Eds, pages 417 to 422, MarcelDekker, Inc. has provided the background knowledge of osmotic technique among the New York and Basel 1979. 2.TBN: the mensuration of the tensio-active agent ratio that % is total

Arrive the dry residue hydrolysis of the regulation of 8.1.2 part with known quantity (Dg is approximately 10g) according to 8.1 of ASTM D3712, difference is partly to use the hydrochloric acid of 200ml 25% (percent by volume) (proportion 1.18) at least at 8.1.1.The usage quantity of hydrochloric acid should be enough to high alkaline detergent residuum acidifying/be hydrolyzed into organic substance (tensio-active agent) and inorganic substance (calcareous material is as calcium chloride).The blended ether extract is made it dry by anhydrous sodium sulphate.With purified ether flushing sodium sulfate, blended ethereal solution evaporation drying (about 110 ℃) is produced the hydrolysed residual thing.Exsiccant hydrolysed residual thing is expressed as E in gram.

The percentage ratio Y of the total tensio-active agent in the initial liquid high alkaline detergent provides with following formula: $Y=\frac{E}{D}\×C$

The total tensio-active agent of and TBN: % provides with following formula than X:

The TBN/Y of X=liquid high alkaline detergent

Should be noted in the discussion above that when measuring X, the amount usefulness of tensio-active agent be its free state (that is, not being its salt or other derivative).3. Single mensuration of planting tensio-active agent (with its free state) in the surfactant system

The technology that describes below will singly be planted tensio-active agent and be come out with the isolated in form of hydrolysis from the hydrolysis surfactant mixture that high alkaline detergent obtains.As following pointed, the ratio of each tensio-active agent is that single tensio-active agent of planting is with the mass ratio of hydrolysed form in the surfactant mixture of hydrolysis.Therefore, for example when high alkaline detergent contained the phenates/sulfonate of calcium/salicylate surfactant system, single ratio of planting tensio-active agent was expressed as phenol, sulfonic acid and salicylic ratio respectively in the surfactant system.

Can determine single ratio of planting tensio-active agent in the following method.

The dry hydrolysed residual thing of the above-mentioned known quantity that obtains (Fg approximately is 1g) is placed the top of the sintered glass post of using the filling of 60-100US purpose synthetic silicic acid magnesium carrier of 450 * 25mm (internal diameter).The synthetic silicic acid magnesium carrier is that the CAS number is the Magnesium Silicate q-agent of 8014-97-9.The amount of the solvent that seven kinds of used polarity increase one by one during the wash-out cylinder all is 250ml, they be heptane, hexanaphthene, toluene, ether, acetone, methyl alcohol, last a kind of be the mixture of ammonia solution (proportion 0.88) of Virahol and 6% (volume) of the chloroform, 44% (volume) of 50% (volume).Collect each fraction, evaporation drying is weighed the residuum that obtains, and analyzes the amount (G of tensio-active agent contained in the fraction then ¹, G ², G ³G) and character.

Can be with analyzing fraction (or hydrolysed residual thing) as chromatogram, spectrum and/or titration (colour indicator or potentiometer) technology known to those skilled in the art.When this high alkaline detergent contains sulfosalt surfactant and salicylate tensio-active agent, these surfactant waters separate the sulfonic acid that obtains and Whitfield's ointment normally from cylinder together by elution.In this situation and under the situation of the ratio that must measure the sulfonic acid that contains in the mixture, can measure the ratio of sulfonic acid in the mixture in the method described in the Trans.Far.Soc.April 1948,226 with Epton.

In the above methods, the quality that determines its hydrolysed form from the fraction that contains the designated surface promoting agent (in gram, is expressed as H ¹), like this, the ratio of this tensio-active agent is in the surfactant system of original high alkaline detergent $\frac{H^1}{F}\×100\%$

Can predict single tensio-active agent of planting based on surfactant system (with its free form from ratio as the used tensio-active agent of parent material, promptly, be not its salt or other derivative) percentage ratio (quality), condition is to know ' activeconstituents ' percentage ratio (r.i.) of each tensio-active agent parent material.Just can predict the percentage ratio of tensio-active agent total in the liquid high alkalinity product (with its free form) then, and can determine TBN: % tensio-active agent ratio.Terminology used here ' activeconstituents ' is the mass percent with calcium metal bonded tensio-active agent.

In the another one embodiment, for example, purification agent can comprise and vulcanizes the alkylphenol calcium of high alkalinityization and the mixture of alkyl sodium salicylate then, EP-A-750, an example has been described in 659, be referred to as purification agent-dispersant additives, it is characterized in that as the lubricating oil of sulfuration and alkylsalicylate-alkyl phenate type super alkalization, alkaline-earth metal:

A) in the alkyl substituent of said alkylsalicylate-alkyl phenate at least 35wt%, at most the part of 85wt% is a linear alkyl, carbonatoms wherein is 12-40, preferred 18-30 carbon atom, the part of 65wt% is a branched-chain alkyl at most, carbonatoms wherein is 9-24, preferred 12 carbon atoms;

B) the shared ratio of alkylsalicylate is 22mol% at least in alkylsalicylate-alkyl phenate mixture, preferably at least 25mol% and

C) alkaline earth base mol ratio roughly is 1.0-3.5 in alkylsalicylate-alkyl phenate.(c1) First kind of antioxidant

The example of the antioxidant of sulfur-bearing (compound) is that preferred C is arranged ₅-C ₁₂The alkaline earth salt of alkylphenol thioesters of alkyl group side chain, nonyl phenol sulfurated lime, ashless oil soluble phenates and sulfuration phenates, phosphorus sulfuration or sulfuration hydrocarbon, the molybdate compound of phosphatide and other sulfur-bearing.Other example of the antioxidant of sulfur-bearing is the metal-salt of dialkyl phosphorodithioic acid or the metal-salt of dialkyldithiocarbamates compound, and metal wherein is selected from Zn, Mn, Ni, Al, 1 family's metal and 2 family's metals.Other sulfocompound comprises those described in the EP-A-699 759, and for example oil, fat or polyolefinic sulfide, sulfenyl wherein have two or more sulphur atoms adjacent and connect in a molecular structure.Such example comprises sulfuration whale oil, sulfuration firpene oil, sulfuration soya-bean oil, sulfurized polyolefin, sulfuration ester, dialkyl disulphides, dialkyl group polysulphide, diphenyl-methyl disulphide, di-t-butyl disulphide, polyolefine polysulphide, as the thiadiazole type compound and the sulfuration phenol of dialkyl group polysulphide thiadiazole.

The sulphurized alkyl phenols relevant with the preparation of phenates tensio-active agent, for example sulphurized alkyl phenols shown in the formula II are described above particularly preferably being.

Phenol antioxidant comprises those of road known in the art.(c2) The aromatic amine antioxidant

The suitable examples of antioxidants that contains aromatic amine is to have at least one aromatic base directly to be connected in aromatic amine at least one amine nitrogen atom.Be preferably secondary aromatic amine, particularly have two aromatic bases to be connected in secondary aromatic amine on the same amine nitrogen atom, but do not get rid of the aromatic amine that uses other.This amine can contain one or more aromatic bases, for example at least two aromatic bases.When having two aromatic bases, the two is preferably and all directly is connected on the same amine nitrogen.Can use two aromatic bases with covalent linkage or atom or group (as Sauerstoffatom or sulphur atom, or-CO-,-SO2 or alkylidene group) compound that is connected.Being preferably the aromatic nucleus of hydrocarbon, can be that not having substituted also can be to replace with the one or more substituting groups that are selected from alkyl, cycloalkyl, alkoxyl group, aryloxy, acyl group, amido, hydroxyl and nitro.Be preferably the amine that contains the aromatic hydrocarbon ring that alkyl replaces, particularly contain those of phenyl that two alkyl replace.Preferred N-arylamines is a naphthylamines, particularly comprises the pentanoic of the pentanoic that alkyl replaces, alkyl wherein can be identical also can be different and 1-28 carbon atom arranged.Also can use other nitrogenous antioxidant, as Vermitin type compound.

Other known additives also can add lubricating oil composition of the present invention, as long as they are different from defined additive among the present invention.For example, they can comprise dispersion agent; Purification agent is as independent or blended purification agent; Rust-preventive agent; Anti-wear agent; Antioxidant; Corrosion inhibitor; Friction modifier or anti-friction composition; Pour point depressant; Defoamer; Viscosity modifier and tensio-active agent.

They can mix with the ratio in road known in the art.

The general ratio of additive that is used for TPEO (trunk engine oil) is as follows:

Additive	Quality % activeconstituents * (wide region)	Quality % activeconstituents * (preferably)
			Purification agent dispersion agent anti-wear agent antioxidant rust-preventive agent pour point depressant mineral oil or synthetic base oil	0.5-15 0.5-5 0.1-1.5 0.1-3 0.03-0.15 0.03-0.15 equal amount	2-7 1-3 0.5-1.3 0.5-1.5 0.05-0.1 0.05-0.1 equal amount

* based on the quality % of the activeconstituents of processed oil.

The general ratio of additive that is used for MDCL (marine diesel lubricant cylinder) is as follows:

Additive	Quality % activeconstituents * (wide region)	Quality % activeconstituents * (preferably)
			Purification agent dispersion agent anti-wear agent antioxidant pour point depressant mineral oil or synthetic base oil	1-25 0.5-5 0.1-1.5 0.1-5 0.03-0.15 equal amount	3-12 1-3 0.5-1.3 0.5-3 0.05-0.1 equal amount

* based on the quality % of the activeconstituents of processed oil.

When using multiple additives, may need but and nonessential preparation one or more comprise a whole set of prescription of additive or the enriched material of these additives, several additives can be joined simultaneously with this and form lubricating oil composition in base oil.Can promote a whole set of prescription of additive to be dissolved in the lubricating oil by solvent and low-grade fever stirring, but this is optional.In the final additive the whole series prescription that forms, generally comprise the additive of appropriate amount so that when a whole set of prescription of this additive mixes with the base lubricant of predetermined amount, produce required concentration and/or bring into play required effect.Therefore, according to composition of the present invention a) and b) can be mixed together with a spot of base oil or other solvent that can hold altogether and other required additive and form a whole set of prescription of the additive that contains activeconstituents, its amount based on a whole set of prescription of additive is as 2.5-90wt%, be preferably 5-75wt%, most preferably be 8-60wt%, additive adds with suitable ratio, and remaining is base oil.

Final prescription generally can contain a whole set of prescription of additive of about 5-40 quality %, and remaining is base oil.

Term used herein ' activeconstituents (a.i.) ' refers to the additive material of non-diluent.

Term used herein ' oily solubility ' or ' oily dispersibility ' are not that necessarily to refer to the compound of any ratio or additive all be soluble, decomposable, maybe can suspending of easily mixing in oil.But these mean that for example they are soluble to a certain extent or can stably be dispersed in the oil to bring into play their desired effects in the environment that uses oil.In addition, if desired, other additive of Jia Ruing also allows to add the more special additive of a large amount in addition.

Before lubricant compositions of the present invention is included in and mixes and after can keep also can not keeping single (promptly isolating) composition of the qualification of same chemical property.

Embodiment

With the following examples the present invention is described, but limits the present invention anything but. Composition

Composition used among the embodiment is as follows. High alkaline metal detergent

X-tensio-active agent phenol, sulfonic acid and salicylic high alkaline calcium salt (phenates/sulfonate/salicylate) are prepared as follows.

Keep under the about 20 ℃ situation thinning oil (22g) with toluene (490g), methyl alcohol (330g), water (30g) and 150N to import reactor and mix in temperature.Add calcium hydroxide (Ca (OH) ₂) (150g), mixture is stirred and heated to 40 ℃.Keep 40 ℃ temperature, add in the slurries that in this way obtain in the mixture of following regulation: phenol tensio-active agent (127g), sulfonic acid tensio-active agent (98g) and toluene (100g) add the toluene of a certain amount of (50g) subsequently again.The Whitfield's ointment tensio-active agent (172g) of following regulation also joins in this mixture.

Neutralize behind this tensio-active agent with calcium hydroxide, the temperature of mixture drops to about 28 ℃, temperature remains on about 28 ℃, carbonic acid gas (62g) all is absorbed in the reaction mixture with all basically carbonic acid gas to spray in the mixture with the speed that forms basic material simultaneously.Then in 60 minutes, temperature is elevated to 60 ℃, in 30 minutes, mixture is cooled to about 28 ℃ then.At 28 ℃, add calcium hydroxide (122g) and carbonic acid gas (62g) in addition.After this second time carbonation step, temperature was elevated to 60 ℃ in 90 minutes.

Then, polar solvent is distilled away, product is filtered to remove settling.Then remaining volatile matter is distilled away and add thinning oil (122g).

Used phenol is sulphurized alkyl phenols when preparing above, and it is by single sulfur subchloride with 65/35 (mass ratio) blended uncle's nonyl (three propylidene) phenol (mainly being para-orientation) and uncle's dinonyl phenol (mainly being 2,4 replacements) (a.i.=84; R.i.=40) synthetic; Used sulfonic acid is from SO when preparing above ₃(with liquid SO ₂Form) molecular weight that obtains is 683 (a.i.=96; R.i.=84) alkyl benzene sulphonate (ABS); Used Whitfield's ointment is alkyl salicylate (a.i.=98 in the preparation; R.i.=70). Dispersion agent

The reaction product of a P-polyisobutenyl succinic anhydride-polyamine. Antioxidant

Q-nonyl phenyl sulfide

The pentanoic that R-nonyl replaces Other composition

S-zinc dialkyl dithiophosphate (ZDDP) with uncle C8 and the preparation of secondary C4 alcohol

T-zinc dialkyl dithiophosphate (ZDDP) with the preparation of uncle C8 alcohol

U-emulsion splitter Lubricant compositions and test

As the lubricant compositions of marine diesel lubricating oil with oil base stock, as above said component X is mixed mutually and is prepared with composition P-U.Under the temperature that improves, mix.Contain the following composition of representing with quality % in the said composition: X 11.4; Q 7.5; R 7.5; P 2.22.

Kinematic viscosity when when this composition being used for lubricated marine diesel engine, carrying out 100 ℃ of regular sampling Detection lubricating composition according to the method for ASTM D445.Test is to carry out on two different middling speed trunk piston marine diesel engines. The result

Test result is shown in following table 1 and 2, and viscosity wherein is with mm ²s ^-1The expression 100 ℃ the time viscosity.Initial viscosity peak viscosity test duration (h) viscosity of engine increases

(％)Wartsila????????13.5????????14.22????????4,500??????????5.338L46????????????14.0????????14.61????????3,000??????????4.36MAN?B+W7L48/60

These results demonstrate: with comparing of being expected in the engine of above-mentioned pattern, the increase of viscosity is very low: the qualification that engine producer allows is to increase about 30%.

Be also noted that, in practice of the present invention, can use from 2-hydroxy benzenesulfonic acid or the tensio-active agent that obtains from alkaryl acetate as purification agent,, and/or can use dialkyl zinc dithiophosphate (ZDDP) as antioxidant as form with its calcium salt.

Claims (11)

1. marine diesel lubricating oil composition, it comprises that the oil of the lubricant viscosity of main amount and mix mutually with it or adds a spot of following additives wherein:

(a) oil soluble ashless dispersant;

(b) oil soluble high alkaline metal detergent, its surfactant system are by one or more tensio-active agents, at least two kinds of different tensio-active agent deutero-for example, and wherein said a kind of tensio-active agent is a salicylate; With

(c1) first kind of sulfur-bearing or phenols or the two oil-soluble inhibitor that all has, or

(c2) oil soluble aromatic amine antioxidant,

Or (c1) He (c2) the two all has,

The TBN at least 10 of said composition, for example at least 20, the viscosity index at least 90 of said composition, preferably at least 100, more preferably at least 105.

2. according to the composition of claim 1, wherein the TBN of purification agent is 200 at least, preferably at least 250, particularly at least 300, and for example can be up to 600.

3. according to the composition of claim 1 or 2, purification agent wherein is a calcium cpd.

4. according to the composition in above-mentioned arbitrary claim, wherein at least a tensio-active agent is a phenates.

5. according to the composition of claim 4, purification agent wherein is a kind of title complex that comprises the high alkalinity mixture of calcium sulfenyl phenolate and alkyl sodium salicylate.

6. according to the composition of claim 4, purification agent wherein is to vulcanize the alkylphenol calcium of high alkalinityization and the mixture of alkyl sodium salicylate then.

7. according to the composition of above-mentioned arbitrary claim, wherein the antioxidant of sulfur-bearing is a kind of ashless sulphurized alkyl phenols.

8. according to the composition of above-mentioned arbitrary claim, wherein the aromatic amine antioxidant is a kind of alkylating secondary amine.

9. the method for lubricated marine diesel such as trunk engine, it is included in the lubricating oil composition that uses arbitrary aforesaid right requirement in the engine.

10. the additive (a) of claim 1 definition, the purposes of one or both (b) and (c1) and (c2) is used to improve the ability that the anti-viscosity of the lubricating oil composition that comprises these additives that is used for marine diesel increases.

11. according to the method for claim 9 or the purposes of claim 10, marine diesel wherein is a trunk engine.