Gasoline engine lubricating oil composition and preparation method thereof

A lubricating oil composition and gasoline engine technology, applied in lubricating compositions, petroleum industry, additives, etc., can solve the problems of catalyst poisoning and restriction, and achieve the effects of prolonging service life and excellent anti-oxidation and anti-wear performance

Active Publication Date: 2019-04-26
CHINA PETROLEUM & CHEM CORP +2
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  • 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 three-necked flask with a stirring device, add 141.6g (0.4mol) of diisooctyl dithiophosphoric acid, keep the temperature at 60°C, and add 5.7g of 30% hydrogen peroxide solution dropwise within 30 minutes (equivalent to hydrogen peroxide is 0.05 mol), continue to react for 2 hours after the dropwise addition, then raise the temperature to 70°C, add 13.4g (0.165mol) of zinc oxide, raise the temperature to 75-90°C and react for 3-5 hours, continue to heat up to 95-105°C, and depressurize The residual moisture was distilled off, and the antioxidant and anti-wear agent of the present invention was obtained by filtration, which was designated 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, the antioxidant and anti-wear agent of the present invention is prepared by using sulfuric acid of different structures, different molar ratios of sulfuric acid to hydrogen peroxide, and different molar ratios of hydrogen peroxide to zinc oxide, which are respectively recorded as samples 2-4 , the reaction conditions are shown in Table 1.

[0029] Contrast Antioxidant and Antiwear Agents 1-4

[0030] Also listed comparative sample 1-4 in table 1, wherein comparative sample 1 is the zinc diisooctyl dithiophosphate (C8 primary alcohol ZDDP) of commercialization, domestic code name is T203; Comparative sample 2 is 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 method; comparative sample 4 ...

Embodiment 1～4

[0051] Embodiment 1~4 and comparative example 1~5

[0052] The antioxidant and antiwear agents of Preparation Examples 1 to 4 of the present invention and the other four comparative antioxidant and antiwear agents were mixed at 70°C for 1 hour according to the compositions and proportions in Table 2 to obtain the antioxidative and antiwear agents of Examples 1 to 4. Lubricating oil composition and the 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 anti-wear agent is 2.0%. The oil sample without antiwear agent was taken as the blank sample, i.e. comparative example 5. Examples 1-4 and Comparative Examples 1-5 are the same except for the anti-wear agent. Comparative examples 6 and 7 are API SN refined oils sold on the market.

[0053] Using the lubricating oil compositions of Examples 1-4 and the lubricating oil compositions of Comparative Examples 1-7 as ...

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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 comprises an anti-oxidation and anti-abrasion agent, high molecular succinimide, salicylate, alkylated diphenylamine, thiocarbamate, an organic molybdenum friction improver, barium sulfonate and lubricating oil base oil. A preparation method of theanti-oxidation and anti-abrasion agent comprises the following steps that dithiophosphorus acid reacts with peroxide, then saponification reaction is carried out with a zinc-containing compound, and an oil phase product is collected. The gasoline engine lubricating oil composition has excellent anti-oxidation and anti-abrasion performance, antifriction performance and dispersion performance, can meet the requirements of high-grade gasoline engine lubricating oil, and prolongs the service life of the oil product.

Description

technical field [0001] The 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 technology (GDI) have been more and more widely used. The application of new technology not only improves the performance of the engine, but also makes the working conditions of the gasoline engine more severe, and the requirements for gasoline engine oil are also getting higher and higher. On the one hand, the temperature of the engine increases, which puts forward higher requirements on the anti-oxidation performance of the oil; on the other hand, the in-cylinder direct injection technology makes the combustion of gasoline engine oil incomplete, and produces a large amount of GDI soot, which is harmful to the oil. The dispersion performance and anti-...

Claims

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Application Information

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Patent Type & Authority Applications(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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