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Diesel engine oil composition and preparation method thereof

A technology for oil composition and diesel engine, applied in the directions of lubricating composition, petroleum industry, additives, etc., can solve the problem that the performance requirements of high-grade diesel oil cannot be fully satisfied.

Pending Publication Date: 2020-04-21
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing detergents and ashless dispersants cannot fully meet the performance requirements of high-grade diesel engine oils, therefore, the existing technologies need to be further improved

Method used

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  • Diesel engine oil composition and preparation method thereof
  • Diesel engine oil composition and preparation method thereof
  • Diesel engine oil composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] The preparation of embodiment 1 ethylene-propylene copolymer viscosity index improver OCP

[0090] In a 2000 ml three-neck flask with temperature control, water cooling and stirring, add 100 grams of ethylene-propylene copolymer (Mw=182000, 55% ethylene content, purchased from China Petroleum Jilin Petrochemical Company), cut into 0.5cm3 Then add 900 grams of 150SN (produced by Sinopec Gaoqiao Petroleum Company), heat up to 135 ° C, control the stirring to 300 rpm, and keep the temperature for 5 hours to obtain 1000 grams of viscosity index improver. Analysis Its weight-average molecular weight Mw=116310, and the ethylene content is 55%.

Embodiment 2

[0091] Embodiment 2 Preparation of dispersed ethylene-propylene copolymer viscosity index improver DOCP1

[0092] Take 100 grams (0.000086 mol) of the OCP viscosity index improver prepared in Example 1, put it into a 250 ml three-necked bottle with temperature control, water cooling, and stirring, protect it with nitrogen, and heat up to 85 ° C, then add the initiator to pass Add 1.0 g of benzoyl oxide, add 1.4 g of N-bromosuccinimide (0.0088 mol, dissolved in 6 g of carbon tetrachloride), control the reaction temperature at 75 ° C, react for 5 hours, then add 1.0 p-hydroxyaniline g (0.009mol), control the reaction temperature to 75°C, react for 50 minutes, and then filter to remove the solid slag.

[0093] Add 1.5 g of azobisisobutyronitrile and 2.4 g (0.024 mol) of maleic anhydride to the brominated tackifier obtained above, and carry out grafting reaction at 150° C. for 2 hours. After the reaction, nitrogen was purged at 150° C. for 2 hours to remove unreacted maleic anhyd...

Embodiment 3

[0094] Embodiment 3 Preparation of dispersed ethylene-propylene copolymer viscosity index improver DOCP2

[0095] Take 100 grams (0.000086 mol) of the viscosity index improver obtained by the reaction in Example 1, add it into a 250 ml three-neck flask with temperature control, water cooling, and stirring, protect it with nitrogen, and heat up to 85 ° C, then add the initiator azo 1.2 grams of diisobutyronitrile, and add 0.8 grams (0.01mol) of bromine water, control the reaction temperature to 80°C, react for 4 hours, then add 1.0 grams (0.009mol) of m-hydroxyaniline, react for 30 minutes, then filter to remove solid residue .

[0096] Add 1.2 grams of benzoyl peroxide and 2.8 grams (0.0286 mol) of maleic anhydride to the above brominated tackifier, and carry out grafting reaction at 150° C. for 2 hours. After the reaction, nitrogen was purged at 150° C. for 2 hours to remove unreacted maleic anhydride. Then control the temperature at 110°C, drop 3.6 grams (0.025mol) of trie...

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Abstract

The invention provides a diesel engine oil composition and a preparation method thereof. The diesel engine oil composition comprises a viscosity index improver, a clearing agent, a dispersing agent, an antioxidant, an anti-wear agent, a pour point depressant and a main amount of lubricating base oil. The structure of the viscosity index improver is shown as a general formula (I) or (II) shown in the specification, wherein the definition of each group is shown in the specification. The diesel engine oil composition disclosed by the invention has excellent high-temperature detergency, soot dispersibility, oxidation resistance, wear resistance, metal corrosion inhibition performance and low-temperature performance, can meet the requirements of API CI-4 specifications, and meanwhile, has reduced phosphorus content, and can meet the requirements of environment-friendly emission.

Description

technical field [0001] The invention relates to an internal combustion engine lubricating oil composition, in particular to a diesel engine oil composition. Background technique [0002] At present, diesel engines adopt direct injection, delayed injection of fuel, high top ring piston and exhaust gas circulation technology to meet the requirements of high power and low emission, which will result in high working temperature and high soot content of oil products, and the requirements for oil formula higher. For example, in a diesel engine, the maximum working temperature of the piston top bank is above 300°C. This temperature will intensify the oxidation of oil products and produce a large amount of polar substances such as coking precursors, organic acids, and inorganic acids; the existence of soot will also cause blockage. Oil filter, causing cylinder liner, piston ring and valve group wear. Therefore, engine oils have increasingly strict requirements on soot dispersion. ...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M149/02C08F8/32C08F8/22C08F255/02C08F222/06C10N40/25C10N30/02C10N30/04C10N30/06C10N30/10C10N30/12C10N30/08
CPCC10M169/044C10M149/02C08F8/32C08F255/023C10M2219/046C10M2219/044C10M2219/02C10M2223/041C10M2223/049C10M2219/066C10M2215/06C10M2215/223C10M2223/045C08F8/22C08F210/16C08F8/30C08F222/06
Inventor 刘依农段庆华苏朔徐冰
Owner CHINA PETROLEUM & CHEM CORP
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