Internal combustion engine lubricating oil composition

A lubricating oil composition and composition technology, applied in lubricating compositions, petroleum industry, additives, etc., can solve the problems of hidden dangers in the use of boronized ashless, high phosphorus content, coexistence of detergency and easy precipitation, etc.

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

[0017] It can be seen from the introduction of the above patents that in order to meet the stringent high-temperature detergency requirements of diesel engine oil, more metal detergents are required in the lubricating oil composition. Precipitation is easy to occur when coexisting
In order to meet the requirements of dispersing soot, when it is necessary to introduce borated ashless into the lubricating oil composition, the use of borated ashless will have hidden dangers due to the hydrolytic stability of borated ashless
The introduction of polymer ashless makes the composition of the formula complex and the cost of preparation increases
At the same time, the phosphorus content in the above composition is relatively high

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
Comparison scheme
Effect test

preparation example Construction

[0082] Preparation of organothiophosphonic acid A

[0083] 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.

[0084] Preparation of organothiophosphonic acid B

[0085] 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, heating rate 30 ° C / hour, 12 hours a...

Embodiment 1

[0087] 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.

[0088] Add 60 grams of organothiophosphonic acid A (molecular weight=1112, 0.054mol) and 62.72 grams (0.081mol) of alkyl salicylic acid in the 500ml three-necked flask that temperature control system and electric stirring are installed, add 120ml n-heptane again, stir 5 minutes, then add 8.9 grams of calcium oxide (0.159mol), add 5 grams of water (0.278mol), 2.2 grams of 98% benzoic acid, heat up to 95 ° C and react for 6.5 hours. At this time, the material turned into a brown liquid. Add 85 Gram 150SN diluting oil, then distill out water, material is cooled to 50 ℃, is centrifugal 30 minutes on the centrifuge of 2000rpm in rotating speed, distills after removing the slag, obtains low alkali value cleaning agent Ca-1, and its alkali value is 78.7mgKOH / g, The sulfur co...

Embodiment 2

[0090] 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 material twice.

[0091] 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), then add No. 200 solvent gasoline of 100ml, stir 5 minutes, then add 4.6 grams of calcium oxide ( 0.082mol), 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 of alkyl salicylic acid (0.081mol) and react for 15 minutes, then add 4.3 grams of calcium oxide (0.077mol), 2 grams of water (0.111mol), 2.2 grams of benzoic acid, control the reaction temperature to be 95 ° C, and react 3 hour, add 85 grams of 150SN diluent oil after the reaction, then distill out the water, cool the material to 50°C, cent...

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Abstract

The invention provides an internal combustion engine lubricating oil composition which comprises(A)a low-alkaline-value clearing agent which is 0.1-6.0 percent of the total mass of the composition, (B) a high-alkaline-value clearing agent which is 0.1-8.0 percent of the total mass of the composition, (C) a dispersing agent which is 0.1-8.0 percent of the total mass of the composition, (D) an antioxidant which is 0.1-3.0 percent of the total mass of the composition and (E) lubricating basic oil which is used as a main component of the composition, wherein a preparation method for the low-alkaline-value clearing agent comprises the following steps: simultaneously or sequentially performing saponification on organic sulfur phosphonic acid, oxides of alkaline metals and / or alkaline-earth metals, water, alkylsalicylate and inorganic acid and / or an aromatic carboxylic acid accelerator, and collecting products. The internal combustion engine lubricating oil composition disclosed by the invention is relatively low in phosphorous content, relatively high in high-temperature detergency, oxidation resistance, and abrasion resistance and relatively low in metal corrosivity, and can meet the performance requirements of an API CF-4 15W / 40 diesel engine oil and requirements of environment-friendly emission.

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 diesel engine. Background technique [0002] At present, with the development of diesel engines in the direction of small size and high power, the operating temperature of diesel engines is higher, the load is greater, and the requirements for oil products are higher. For example, in a diesel engine, the working temperature of the piston top and shore reaches a maximum of 300°C. This temperature will intensify the oxidation of oil products and produce a large amount of polar substances such as coking precursors, organic acids, and inorganic acids. At the same time, when the oil works at this temperature and load, it will produce a lot of soot, which will cause the thickening of the oil and the wear of the engine. Therefore, the cleaning, dispersing, anti-oxidation, and anti-wear capabilities of ordinary oils ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M141/10C10M137/14C10M129/54C10N30/04C10N40/25
Inventor 刘依农段庆华李玲
Owner CHINA PETROLEUM & CHEM CORP
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