Lubricating oil composition for diesel engine and manufacturing method thereof

A technology for lubricating oil composition and diesel engine, applied in the directions of lubricating composition, petroleum industry, additives, etc., can solve the problems of shortening engine life, affecting engine operating condition performance, insufficient attention to rust prevention performance, etc.

Active Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when these compounds of the prior art are used in diesel engine lubricating oils, there is still room for improvement in the anti-oxidation properties, cleansing and dispersing properties and anti-wear properties of the oil products.
In addition, in addition to the adverse effects of deposits, the corrosion of the engine will also seriously shorten the life of the engine, and the corrosion of some key parts will also affect the working performance of the engine to a large extent
The existing technology does not pay enough attention to the anti-rust performance

Method used

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  • Lubricating oil composition for diesel engine and manufacturing method thereof
  • Lubricating oil composition for diesel engine and manufacturing method thereof
  • Lubricating oil composition for diesel engine and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0246] In a 500ml four-neck flask equipped with a stirrer, thermometer, condenser and dropping funnel, add 58.79g (0.323mol) of 2-tert-butyl-6-mercaptophenol, 6.88g (0.048mol) of boron trifluoride Ethyl ether (catalyst for alkylation reaction), 100ml of n-hexane solvent and 161.61g (0.162mol) of polyisobutene (Mn=1000, manufactured by Jihua Group Fine Chemicals Co., Ltd.) were reacted at 80°C for 2h. After the reaction, the reaction mixture was washed once with 5% potassium hydroxide solution by mass fraction, and washed to neutrality with hot water to remove the catalyst, and then the solvent and unreacted phenol were distilled off under reduced pressure to obtain polyisobutylene mercaptophenol, hydroxyl The value was 53.49 mgKOH / g. For the determination of hydroxyl value, refer to the acetic anhydride method in GB / T7383-2007.

[0247] An example reaction is as follows:

[0248]

[0249] From the proton nuclear magnetic spectrum analysis of the polyisobutylene mercaptoph...

Embodiment 2

[0251]

[0252] Under a nitrogen protection atmosphere, in a 250ml four-necked flask equipped with a stirrer, a thermometer, a condenser and a dropping funnel, add 30.58 grams (156 mmol) of 2-mercapto-4-methyl-6-methylphenol, 9.29 grams ( 112mmol) formaldehyde, 32.38g (176mmol) N-phenyl-p-phenylenediamine and 100mL toluene, stirred rapidly, and reacted at 100°C for 2h. After the reaction was finished, the solvent and a small amount of water generated were distilled off under reduced pressure, and the shielded phenol product with the structure shown in the title was obtained through column chromatography separation.

[0253] Product characterization data are as follows:

[0254] 1 H NMR (300MHz, CDCl 3 ): δ1.40(9H), 2.37(3H), 4.02(1H), 4.83(2H), 6.95-7.00(12H), 7.26(2H), 7.55(1H);

[0255] 13 C NMR (75MHz, CDCl 3 ): δ21.2, 30.1, 34.1, 49.9, 114.3, 118.9, 119.4, 121.8, 122.2, 125.8, 126.5, 129.5, 131.8, 132.3, 133.5, 143.3, 150.8;

[0256] C 24 h 28 N 2 OS calcd for ...

Embodiment 3

[0258]

[0259]Under nitrogen protection atmosphere, in the 250ml four-necked flask that stirrer, thermometer, condenser tube and dropping funnel are equipped with, add 31.65 grams (133mmol) 2,6-di-tert-butyl-4-mercaptophenol, 1.86 grams (62mmol ) formaldehyde, 28.15 grams (153 mmol) of N-phenyl-p-phenylenediamine, 0.75 grams (7.5 mmol) of hydrochloric acid and 150 mL of isopropanol, stirred rapidly, and reacted at 25 ° C for 24 h. After the reaction was finished, the solvent and a small amount of water generated were distilled off under reduced pressure, and the shielded phenol product with the structure shown in the title was obtained through column chromatography separation.

[0260] Product characterization data are as follows:

[0261] 1 H NMR (300MHz, CDCl 3 ): δ1.36-1.54(18H), 3.75(1H), 4.80(2H), 5.32(1H), 6.80(2H), 6.97(5H), 7.17(2H), 7.26(2H), 7.55(1H) ;

[0262] 13 C NMR (75MHz, CDCl 3 ): δ29.6, 34.6, 51.2, 119.4, 121.8, 126.5, 129.5, 131.4, 136.6, 144.5, 15...

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PUM

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Abstract

The invention relates to a lubricating oil composition for a diesel engine. The lubricating oil composition comprises a hindered phenol compound, an antioxidant, an ashless dispersant, a metal detergent, ZDDP, an ashless friction modifier and a major amount of lubricating base oil, wherein the hindered phenol compound has a structure as shown in a formula (I) which is described in the specification. Each group in the formula (I) is as defined in the specification. The lubricating oil composition for the diesel engine in the invention can meet the increasingly stringent requirement of modern products with higher specifications on oxidation resistance and show excellent cleaning and dispersion properties, anti-wear performance and anti-rust performance.

Description

technical field [0001] The invention relates to a diesel engine lubricating oil composition. Specifically, the present invention relates to a lubricating oil product meeting CH-4, CI-4 and CJ-4 and above specification diesel engine lubricating oil products. Background technique [0002] At present, zinc dialkyldithiophosphate (ZDDP), which is widely used in lubricating oil, is a multi-effect antioxidant and anti-wear agent, which has outstanding anti-oxidation effect and excellent anti-wear performance. However, phosphorus will poison and invalidate the catalyst in the automobile exhaust catalytic converter, which is very harmful to the protection of the environment. With the increasing environmental protection requirements, lubricating oil tends to be low-phosphorus and low-ash, or even non-phosphorus and ash-free. This makes the use of ZDDP strictly limited, and the oxidation stability and anti-wear performance of the oil cannot be fully guaranteed. [0003] In recent y...

Claims

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Application Information

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IPC IPC(8): C10M135/30C10M135/36C10M161/00C10N40/25C10N30/08C10N30/12C10N30/04C10N30/02C10N30/10
Inventor 苏朔龙军段庆华武志强王立华
Owner CHINA PETROLEUM & CHEM CORP
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