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Gasoline engine oil composition and preparation method thereof

A technology of gasoline engine oil and composition, which is applied in lubricating composition, petroleum industry, additives, etc., and can solve problems such as large amount of addition and suboptimal formulation performance

Pending Publication Date: 2020-04-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Among the compositions reported in the above patents, although they can meet the requirements of various gasoline engine oil specifications, the performance in some formulations is not optimal. At 5% to 10%, and the low-speed pre-ignition phenomenon has not been completely resolved

Method used

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  • Gasoline engine oil composition and preparation method thereof
  • Gasoline engine oil composition and preparation method thereof
  • Gasoline 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, ethylene content 55%, purchased from China Petroleum Jilin Petrochemical Company), cut into 0.5cm 3 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 grams (0.009mol), reacted for 50 minutes, and then filtered to remove solid residue.

[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 anhydride. Then control the temperature...

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 0.8 grams (0.01mol) of bromine water were added, the reaction temperature was controlled at 80°C, and the reaction was carried out for 4 hours, then 1.0 grams (0.009mol) of m-hydroxyaniline was added, and the reaction was carried out for 30 minutes, and then the solid residue was removed by filtration .

[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 ma...

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Abstract

The invention provides a gasoline engine oil composition and a preparation method thereof. The gasoline engine oil composition comprises a viscosity index improver, a clearing agent, an antioxidant, adispersing agent, an oiliness agent 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 gasoline engine oil composition has excellent high-temperature detergency, low-temperature dispersibility, oxidation resistance andwear resistance, and can meet the technical requirements of API gasoline engine oil. According to the gasoline engine oil composition, a low-speed preignition phenomenon of gasoline engine oil can bereduced, and the super detonation resistance is improved.

Description

technical field [0001] The invention relates to an internal combustion engine lubricating oil composition, in particular to a gasoline engine oil composition. Background technique [0002] The working temperature of the gasoline locomotive engine is low, and it is in the state of running and stopping for a long time in the city, and it is easy to generate a large amount of low-temperature sludge, which will increase the viscosity of the engine oil, block the oil circuit, and the engine cannot work normally. Therefore, gasoline engine oil is required to have better low-temperature sludge dispersibility. In addition, with the continuous upgrading of exhaust emission requirements, the phosphorus content of engine oil is required to be below 0.08%. [0003] CN101982534A has introduced a kind of energy-saving long-life gasoline engine oil, and its composition comprises: synthetic base oil, composite antioxidant, metal detergent, ashless dispersant, nanoscale friction modifier, ...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M143/02C10M143/04C10N30/02C10N30/06C10N40/25C10N30/04C10N30/10C10N30/08
CPCC10M143/02C10M143/04C10M169/044C10M2205/022C10M2219/046C10M2205/024
Inventor 刘依农段庆华苏朔徐冰
Owner CHINA PETROLEUM & CHEM CORP
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