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Gasoline engine lubricating oil composition and preparation method thereof

A lubricating oil composition, gasoline engine technology, applied in the direction of lubricating composition, petroleum industry, additives, etc., can solve problems such as restrictions, catalyst poisoning, etc.

Active Publication Date: 2022-06-24
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Zinc dialkyldithiophosphate (ZDDP) is a multifunctional additive for anti-wear, anti-oxidation, and anti-corrosion, which is widely used in internal combustion engine oils, but phosphorus-containing additives can cause catalyst poisoning in exhaust gas treatment devices, so phosphorus-containing additives Additives are strictly limited in oil specifications. The ILSAC GF-3 gasoline engine oil specification requires the mass fraction of phosphorus content to be less than 0.1%, and the ILSACGF-5 gasoline engine oil specification requires the phosphorus content to be less than 0.08%. Therefore, in meeting the requirements of environmental protection regulations Under the premise, it has been the goal of those skilled in the art to seek more efficient ZDDP to be applied to gasoline engine oil to improve the anti-oxidation performance and anti-wear performance of oil products.

Method used

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  • Gasoline engine lubricating oil composition and preparation method thereof
  • Gasoline engine lubricating oil composition and preparation method thereof
  • Gasoline engine lubricating oil composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0025] Preparation Example 1 Preparation of Antioxidant and Antiwear Agent

[0026] In a 250ml there-necked flask with a stirring device, add 141.6g (0.4mol) of diisooctyldithiophosphoric acid, keep the temperature at 60°C, and dropwise add 5.7g of 30% hydrogen peroxide solution within 30 minutes (equivalent to 0.05% hydrogen peroxide solution) mol), continue to react for 2 hours after the dropwise addition, then be warming up to 70°C, add 13.4g (0.165mol) of zinc oxide, be warming up to 75~90°C and react for 3~5 hours, continue warming up to 95~105°C, reduce the pressure The residual water was distilled off, and the antioxidant and antiwear agent of the present invention was obtained by filtration, which was recorded as sample 1.

preparation example 2-4

[0027] Preparation Example 2-4 Preparation of Antioxidant and Antiwear Agent

[0028] According to the method of Preparation Example 1, different structures of thiophosphoric acid, different molar ratios of thiophosphoric acid and hydrogen peroxide, and different molar ratios of hydrogen peroxide and zinc oxide were used to prepare the antioxidative and antiwear agents of the present invention, which are respectively recorded as samples 2-4. , and the reaction conditions are shown in Table 1.

[0029] Comparative Antioxidant and Antiwear Agents 1-4

[0030] Comparative samples 1-4 are also listed in Table 1, wherein the comparative sample 1 is a commercialized zinc diisooctyl dithiophosphate (C8 primary alcohol ZDDP), the domestic code is T203; the comparative sample 2 is a commercialized Butyl / isooctyl zinc dithiophosphate (C4 / C8 primary alcohol ZDDP), the domestic code is T202; Comparative sample 3 is C3 / C6 secondary alcohol ZDDP, prepared according to the conventional ZDDP...

Embodiment 1～4

[0051] Examples 1-4 and Comparative Examples 1-5

[0052] The antioxidants and antiwear agents of Preparation Examples 1 to 4 of the present invention and the other 4 comparative antioxidants and antiwear agents were mixed for 1 h at a temperature of 70°C according to the compositions and proportions in Table 2, to obtain Examples 1 to 4. Lubricating oil composition and lubricating oil composition of Comparative Examples 1-4. Wherein, based on the total mass of the lubricating oil composition, the addition amount of the antioxidant and antiwear agent is 2.0%. The oil sample without antiwear agent was used as the blank sample, that is, Comparative Example 5. Except for the anti-wear agent, the compositions of Examples 1-4 and Comparative Examples 1-5 are the same. Comparative Examples 6 and 7 are API SN refined oil sold on the market.

[0053] Taking the lubricating oil compositions of Examples 1 to 4 and the lubricating oil compositions of Comparative Examples 1 to 7 as tes...

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Abstract

The invention provides a gasoline engine lubricating oil composition and a preparation method thereof. The gasoline engine lubricating oil composition of the present invention comprises antioxidant and anti-wear agent, polymer succinimide, salicylate, alkylated diphenylamine, thiocarbamate, organic molybdenum friction modifier, sulfonate Barium acid and lubricating oil base oil, the preparation method of the antioxidant and anti-wear agent comprises: reacting sulfuric acid with peroxide, then carrying out saponification reaction with zinc-containing compounds, and collecting oil phase products. The lubricating oil composition of the invention has excellent anti-oxidation and anti-wear properties, anti-friction properties and dispersing properties, can meet the requirements of lubricating oils for high-grade gasoline engines, and prolong the service life of oil products.

Description

technical field [0001] The present invention relates to a lubricating oil composition, in particular to a gasoline engine lubricating oil composition. Background technique [0002] With the increasingly stringent environmental regulations and the continuous development of gasoline engine technology, turbocharging and direct-injection (GDI) technology have become more and more widely used. The application of new technologies not only improves engine performance, but also makes the working conditions of gasoline engines worse, and the requirements for gasoline engine oil are getting higher and higher. On the one hand, the temperature of the engine increases, which puts forward higher requirements for the anti-oxidation performance of the oil; on the other hand, the direct injection technology in the cylinder makes the gasoline engine oil burn incompletely, resulting in a large amount of GDI soot, which is harmful to the oil. The dispersion performance and anti-wear performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M159/12C10M169/04C10N40/25C10N30/10C10N30/06C10N30/04
CPCC10M159/12C10M169/048C10M2217/06C10M2219/066C10M2219/068C10M2219/044C10M2215/064C10M2205/0285C10M2203/1025C10M2207/262C10N2030/06C10N2030/04C10N2030/10C10N2030/72C10N2040/255C10N2010/12C10N2010/04C10N2020/02
Inventor 孙文斌张辉张倩武志强孙洪伟王立华钟锦声徐杰刘琼张峰
Owner CHINA PETROLEUM & CHEM CORP
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