CN1687338A - Anti high-pressure, high temperature resistant oxidation lubricant and preparation method thereof - Google Patents

Abstract

The invention discloses a high-pressure and high-temperature anti-oxidation lubricating oil for deep well electric pumps and a preparation method thereof. Ash antiwear agent, amine high temperature antioxidant and metal deactivator, metal cleaner, rust inhibitor, pour point depressant. It can also prepare lubricating oil for hydraulic transmission machinery under other high temperature and high pressure conditions. After testing, the anti-high pressure and anti-high temperature oxidation lubricating oil prepared by applying the present invention has good oxidation resistance, wear resistance, thermal stability, high temperature resistance, high pressure resistance, rust and corrosion resistance and emulsification resistance, and the production cost is low. Low, easy deployment, excellent performance, simple method and long service life.

Description

Anti-high pressure anti-high temperature oxidation lubricating oil and preparation method thereof

technical field

The invention relates to a lubricating oil for hydraulic transmission and a preparation method thereof, in particular to a high-pressure, high-temperature, oxidation-resistant and wear-resistant hydraulic lubricating oil for deep well electric pumps.

Background technique

The existing anti-wear hydraulic oil compound has LZS5178 introduced in "Lub.Eng." 1990, 1 "The Evolution of Petroleum Based Hydraulic Fluids" (Kent.B.Grover), when the dosage is When it is 0.85-1.20% (mass fraction), it reaches Denision HF-0, HF-1, HF-2 international standards. The anti-wear hydraulic oil compound agent developed by Beijing Institute of Petrochemical Sciences has a dosage of 2.0% (mass), and the anti-wear hydraulic oil compound agent developed by Nanjing Edison Company has a dosage of 0.85% (mass). The above lubricating oils either have good wear resistance, high pressure resistance, or high temperature oxidation resistance, but none of them have good wear resistance, high pressure resistance and high temperature oxidation resistance at the same time. sex.

Contents of the invention

The object of the present invention is to address the shortcomings of the above-mentioned prior art and provide a basic composition of hydraulic lubricating oil that is applicable to various base oils and has high pressure resistance, high temperature oxidation resistance and wear resistance.

Another object of the present invention is to provide a method for preparing high-pressure, high-temperature, oxidation-resistant, and wear-resistant hydraulic lubricating oil.

The purpose of the present invention is achieved in the following manner:

The basic components and contents are:

α-olefin synthetic oil 90-95%

Antioxidant preservatives 1-2%

Extreme pressure phosphorus-containing ashless antiwear agent 0.5-1%

Amine high temperature antioxidant 0.5-1%

Metal cleaner 0.15-0.25%

Rust inhibitor 0.1-0.25%

Pour point depressant 0.25-0.5%

All percentages are by mass

The anti-high pressure anti-high temperature oxidation lubricating oil and the preparation method thereof include the following sequence and steps: according to the mass fraction, pour 90-95% of the required α-olefin synthetic oil into a blending kettle with a stirrer; then, according to the mass fraction, Add 1-2% of anti-oxidant preservative, 0.5-1% of extreme pressure phosphorus-containing ashless anti-wear agent and 0.5-1% of amine high-temperature antioxidant, stir for 30 minutes at 50-60°C; then add anti-corrosion 0.1-0.25% of rust agent, 0.15-0.25% of metal cleaner and 0.25-0.5% of pour point depressant are stirred at 70-80°C for 90-120 minutes until the mixture is completely dissolved and becomes uniform and transparent.

The present invention can also be realized in the following manner. The alpha-olefin synthetic oil is prepared by mixing 10-20% of alpha-olefin prepared by ethylene oligomerization and 75-85% of base oil.

Said: anti-oxidation preservative, which can be primary and secondary alcohol zinc salt of sulfur phosphorus or butyl octyl zinc salt of phosphorus sulfur or basic zinc salt of bisoctyl sulfur phosphorus; extreme pressure phosphorus-containing ashless antiwear agent, which can be phosphoric acid Tricresyl ester, triphenyl phosphorothioate and its amine derivatives, or di-n-butyl phosphite and its amine derivatives; amine high-temperature antioxidant, which can be 2,6-di-tert-butyl p-methyl Phenol, 2,6-di-tert-butyl mixed phenol, dinonyl diphenylamine, thiadiazole derivatives, or 2,6-dibutyl mixed phenol, dinonyl diphenylamine, thiadiazole Azole derivatives in a 2:1:1 mixture; metal cleaners can be organic sulfonate barium salts or organic sulfonate calcium salts; rust inhibitors can be alkenyl succinic acid derivatives, benzotriazole 1. Heptadecenpyrimazolidinyl diacid salt; the pour point depressant is poly a-olefin, or polymethacrylate derivative, alkyl naphthalene.

The basic components and method of the invention can also be used in the preparation of lubricating oil for hydraulic transmission machinery under other high temperature and high pressure conditions.

After testing, the anti-high pressure and anti-high temperature oxidation lubricating oil prepared by applying the present invention has good oxidation resistance, wear resistance, thermal stability, high temperature resistance, high pressure resistance, rust and corrosion resistance and emulsification resistance, and the production cost is low. Low, easy to deploy, excellent performance. The comprehensive performance test results are listed in the following table:

Comprehensive performance test results of anti-high pressure and anti-high temperature oxidation lubricating oil Analysis Project test results experiment method Kinematic viscosity at 40°C mm ² /s 195.2 GB/T265 Kinematic viscosity at 100℃mm ² /s 22.05 GB/T265 Pour point °C -29 GB/T3535 viscosity index 136 GB/T2541 Flash point °C 248 GB/T3536 Mechanical impurities%(m/m) 0.019 GB/T511 Acid value mgKOH/g 0.46 GB/T264 Water soluble acid and alkali none GB/T259 Moisture % <0.03 GB/T260 Sulfated Ash % 0.16 GB/T2433

Copper sheet corrosion (100°C, 3 hours), grade 1b GB/T5096 Four-ball machine anti-wear test, wear scar diameter 36kg mm 0.48 SH/T0189 Dielectric loss factor, dielectric loss angle, tan8 0.3758 GB/T5654

Detailed ways

Below be described in further detail by embodiment:

High-pressure anti-high-temperature oxidation-resistant lubricating oil and its preparation method are as follows: firstly pour base oil and α-olefin into a blending kettle with a stirrer according to the mass fraction and mix slightly to make α-olefin synthetic oil; then add in sequence according to the mass fraction Antioxidant anti-corrosion agent, extreme pressure phosphorus-containing ashless anti-wear agent, amine high-temperature antioxidant, after stirring for 30 minutes at 50-60°C, then add rust inhibitor, metal cleaner and pour point depressant in sequence. Stir at 70-80°C for 90-120 minutes until the mixture is completely dissolved and becomes uniform and transparent.

Example 1:

First, pour 76% base oil and 19% α-olefin into a blending kettle with a stirrer and mix slightly to make α-olefin synthetic oil, then add 2.0% thiophosphobioctyl zinc salt, 1.0% % tricresyl phosphate, 1.0% 2,6-di-tert-butyl mixed phenol, stirred at 50-60°C for 30 minutes, then added 0.25% heptadecenyl pyrimazolinenyl succinate, 0.25% calcium salt of organic sulfonate and 0.5% polymethacrylate, stirred at 70-80°C for 90-120 minutes until the mixture is completely dissolved and becomes uniform and transparent.

Example 2:

First, pour 78% base oil and 17% α-olefin into a mixing tank with a stirrer and mix slightly to make α-olefin synthetic oil, then add 1.6% thionyl octyl zinc salt, 0.8% Triphenylphosphorothioate, 1.0% 2,6-di-tert-butyl-p-cresol, 0.5% dinonyldiphenylamine, 0.5% thiadiazole derivatives, stirred at 50-60°C for 30 minutes; Then add 0.1% dodecenylsuccinic acid, 0.15% barium dinonyl naphthalene sulfonate and 0.35% polymethacrylate, and stir at 70-80°C for 90-120 minutes until the mixture is completely dissolved and uniform and transparent .

Example 3:

First, pour 76% base oil and 20% α-olefin into a blending tank with a stirrer and mix slightly to make α-olefin synthetic oil; then add 1.5% thionyl zinc salt, 0.7% Tricresyl phosphate, 1.0% 2,6-di-tert-butyl mixed phenol, stirred at 50-60°C for 30 minutes; then add 0.1% heptadecenyl pyrimazolinenyl succinate, 0.3 % organic sulfonic acid calcium salt, 0.4% polymethacrylate, stirring at 70-80°C for 90-120 minutes until the mixture is completely dissolved and becomes uniform and transparent.

Claims (6)

1. anti high-pressure, high temperature resistant oxidation lubricant that is mainly used in the deep-well electric pump and preparation method thereof is characterized in that its basal component and content are:

Alpha olefine synthetic oil 90-95%

Antioxidant preservative 1-2%.

The phosphorous ash-free antiwear agent 0.5-1% of extreme pressure

Amine high-temperature antioxidant 0.5-1%

Metal detergent 0.15-.025%

Rust-preventive agent 0.1-0.25%

Pour point depressant 0.25-0.5%.

All percentage ratios are by massfraction

2, according to said anti high-pressure, high temperature resistant oxidation lubricant of claim 1 and preparation method thereof, it is characterized in that: alpha olefine synthetic oil is to be mixed and made into by the alpha-olefin (10-20%) and the base oil (75-85%) of ethene through the oligomerisation reaction preparation.

3, according to said anti high-pressure, high temperature resistant oxidation lubricant of claim 1 and preparation method thereof, it is characterized in that: this preparation method comprises following order and step:

A. pressing massfraction adds needed alpha olefine synthetic oil 90-95% in the mediation still of belt stirrer;

B. add antioxidant preservative 1-2%, the phosphorous ashless wear-resistant 0.5-1% of extreme pressure and amine high-temperature antioxidant 0.5-1% successively by massfraction then, under 50-60 ℃ condition, stirred 30 minutes;

C. add rust-preventive agent 0.1-0.25%, metal detergent 0.15-0.25% and pour point depressant 0.25-0.5% more successively, under 70-80 ℃ of condition, stirred 90-120 minute, all dissolve to mixture, and homogeneous transparent.

4, according to claim 1,3 said anti high-pressure, high temperature resistant oxidation lubricants and preparation method thereof, it is characterized in that: wherein described in the step b:

Antioxidant preservative can be a sulphur phosphorus brothers alcohol radical zinc salt, or sulphur phosphorus fourth octyl group zinc salt, or the two octyl group basic zinc salt of sulphur phosphorus;

The phosphorous ash-free antiwear agent of extreme pressure can be tritolyl phosphate, triphenyl-thiophosphate and amino derivative thereof, or di-n-butyl phosphite and amino derivative thereof;

The amine high-temperature antioxidant can be a metal passivator, 2,6-ditertbutylparacresol, 2,6-dibutyl mixed phenol, dinonyldiphenylamine class, thiadiazole derivative also can be by 2, and 6-dibutyl mixed phenol, dinonyldiphenylamine class, thiadiazole derivative were with 2: 1: 1 mixture.

5, according to claim 1,3 said anti high-pressure, high temperature resistant oxidation lubricants and preparation method thereof, it is characterized in that: wherein described in the step c:

Metal detergent can be organic sulfonic acid barium salt or organic sulfonic acid calcium salt;

Rust-preventive agent can be dodecenylsuccinic acid analog derivative, benzotriazole, the phonetic azoles quinoline of 17 alkene thiazolinyl diacid salt, also can be dodecenylsuccinic acid and neutral dinonyl naphthalene sulfonate barium with 1: 4 mixture;

Pour point depressant is the Poly alpha Olefins (PAO) class, or polymethacrylate derivative, alkylnaphthalene class.

6, according to claim 1,3 said anti high-pressure, high temperature resistant oxidation lubricants and preparation method thereof, it is characterized in that: also be applicable to the preparation of hydraulic machinery lubricating oil under other high-temperature and high-pressure conditions.