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Internal combustion engine lubricating oil composition

A lubricating oil composition, composition technology, applied in lubricating compositions, petroleum industry, additives, etc., capable of solving problems such as low phosphorus content

Active Publication Date: 2014-04-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Among the compositions reported in the above patents, although they can meet the requirements of various oil specifications, some technologies use toxic metal detergents containing barium, or use high molecular weight ashless dispersants, or the composition has a relatively high phosphorus content. There is no formulation yet that uses less toxic additives while still meeting gasoline engine oil requirements for low temperature sludge dispersibility, detergency, oxidation resistance, antiwear, rust prevention and lower phosphorus content

Method used

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  • Internal combustion engine lubricating oil composition
  • Internal combustion engine lubricating oil composition
  • Internal combustion engine lubricating oil composition

Examples

Experimental program
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Effect test

preparation example Construction

[0079] Preparation of organothiophosphonic acid A

[0080] Add 1000 grams of polyisobutylene with a number average molecular weight of 1000 in a three-necked flask equipped with electric stirring, add P 2 S 5 168 grams, gradually heat up from room temperature to 210°C, the heating rate is 30°C / hour, and react at a constant temperature of 210°C for 12 hours. At this time, the material gradually changes from colorless to brown, and 8.5 grams of water vapor is introduced for reaction and post-treatment . The obtained polyisobutylenethiophosphonic acid had a sulfur content of 5.2% and a phosphorus content of 2.2%, which was recorded as organothiophosphonic acid A.

[0081] Preparation of organothiophosphonic acid B

[0082] Add 1000 grams of polyisobutylene with a number average molecular weight of 2300 in a three-necked flask equipped with electric stirring, add P 2 S 5 158 grams, gradually warming up from room temperature to 225 ° C, the heating rate is 30 ° C / hour, 12 ...

Embodiment 1

[0084]In Example 1, the molar ratio of the raw material organic thiophosphonic acid A to alkyl salicylic acid was 1:1.5, and the saponification reaction was carried out by adding the raw materials at one time.

[0085] Add organic thiophosphonic acid A60 gram (molecular weight=1112, 0.054mol) and alkyl salicylic acid 62.72 grams (0.081mol) in the 500ml there-necked flask that temperature control system and electric stirring are installed, then add No. 120ml No. 200 solvent gasoline, Stir for 5 minutes, then add 6.4 grams of magnesium oxide (0.16mol), add 5 grams of water (0.278mol), 2.2 grams of 98% concentrated sulfuric acid, and then heat up to 95 ° C for 6.5 hours. At this time, the material becomes a brown liquid. After the reaction Add 85 grams of 150SN dilution oil, then distill out the water, cool the material to 50°C, centrifuge for 30 minutes on a centrifuge with a rotating speed of 2000rpm, and distill after removing the slag to obtain a low-alkaline value detergent M...

Embodiment 2

[0087] In Example 2, the molar ratio of the raw material organic thiophosphonic acid A to alkyl salicylic acid was 1:1.5, and the saponification reaction was carried out by adding the raw material twice.

[0088] In the 500ml there-necked flask that temperature control system and electric stirring are installed, add organothiophosphonic acid A60 gram (molecular weight is 1112, 0.054mol), add No. 200 solvent gasoline of 100ml again, stir 5 minutes, then add 3.3 grams of magnesium oxide ( 0.083mol), add 3 grams of water (0.167mol), stir for 25 minutes, heat up to 95°C for 3 hours, and the material turns into a brown liquid. Then add 62.72 grams (0.081mol) of alkyl salicylic acid and react for 15 minutes, then add 3.1 grams of magnesium oxide (0.078mol), 2 grams of water (0.111mol), 2.2 grams of 98% concentrated sulfuric acid, and control the reaction temperature to be 95 ° C. React for 3 hours, add 85 grams of 150SN diluent oil to the reaction, then distill off the water, cool t...

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Abstract

The invention provides an internal combustion engine lubricating oil composition, which comprises: A, a low-base number clearing agent accounting for 0.1-5.0% of the total mass of the composition, wherein the preparation method of the low-base number clearing agent comprises saponification reaction of organic thio-phosphoric acid, oxides of alkali metal and / or alkaline earth metal, water, alkyl salicylic acid, and inorganic acid and / or aryl carboxylic acid accelerants together or in sequence, and product collection; B, a high-base number clearing agent accounting for 0.1-6.0% of the total mass of the composition; C, a dispersant accounting for 0.1-6.0% of the total mass of the composition; D, an anti-oxidant accounting for 0.1-2.0% of the total mass of the composition; E, an oiliness agent accounting for 0.01-5.0% of the total mass of the composition; F, a lubricating base oil forming the main component of the composition. The internal combustion engine lubricating oil composition of the invention is low in phosphorus content, has excellent cleaning, dispersion, anti-oxidation and antirust performance, can reduce the generation of low temperature greasy filth, and can meet the specification requirements of API 5W / 30SJ.

Description

technical field [0001] The invention relates to a lubricating oil composition for an internal combustion engine, in particular to a lubricating oil composition for a gasoline engine. Background technique [0002] At present, with the rapid development of my country's automobile industry, my country's car ownership has grown rapidly. At the end of June 2011, the number of cars in my country reached 217 million, of which the number of cars powered by gasoline engines accounted for more than 40%. Most of these cars are distributed in major cities across the country, causing a series of problems such as sharp urban traffic congestion and increased exhaust emissions. [0003] Different from diesel locomotives, the operating temperature of gasoline locomotive engines is relatively low, and they are in the state of running and stopping for a long time in the city, which is prone to generate a large amount of low-temperature sludge, which will increase the viscosity of the engine o...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M159/22C10N30/04C10N30/10C10N30/12
Inventor 刘依农段庆华李玲张耀
Owner CHINA PETROLEUM & CHEM CORP
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