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A preparing method of a low-sulfur diesel oil lubrication improver

A technology of lubrication improver and low-sulfur diesel oil, which is applied in the petroleum industry, fuel additives, liquid carbon-containing fuels, etc., and can solve problems such as inconvenience, equipment corrosion, etc.

Inactive Publication Date: 2014-09-10
JIANGSU JIAHUA ADVANCED MATERIALS TECH
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Problems solved by technology

Due to the high acid value of fatty acids, long-term use will cause corrosion to equipment, or although the acid value of fatty acid esters is low, the freezing point is generally above 5°C or cause inconvenient use.

Method used

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  • A preparing method of a low-sulfur diesel oil lubrication improver

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Embodiment 1）

[0020] See figure 1 , a preparation method of a low-sulfur diesel lubricity improver, the specific steps are as follows:

[0021] A. Add fatty acid: high carbon alcohol molar ratio = 0.8:1 ~ 1.4:1 into the 500L reactor;

[0022] B. The amount of acid catalyst added is 1‰~1% of the sum of fatty acid and higher alcohol mass;

[0023] C. The amount of xylene added is 0.8 to 1.2 times the sum of the fatty acid and higher alcohol mass, and the temperature is raised to 140 to 180°C, and the reaction is carried out for 6 to 8 hours;

[0024] D, xylene is extracted under reduced pressure, cooled to room temperature;

[0025] E. Add pour point depressant, the amount added is 10-35% of the sum of fatty acid and higher carbon alcohol, and stir for 30 minutes.

[0026] F, filter the material.

[0027] The acid catalyst is one or a mixture of concentrated sulfuric acid or sulfonic acid or sulfamic acid or Y-type molecular sieve solid acid or heteropolyacid or aluminosilicate solid acid...

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Abstract

The invention relates to a preparing method of a low-sulfur diesel oil lubrication improver. The preparing method is characterized by including steps of: A) adding a fatty acid and a higher alcohol according to a molar ratio of 0.8:1-1.4:1 into a reactor having a volume of 500 L; B) adding an acid catalyst the weight of which is 0.1-1% of the total weight of the fatty acid and the higher alcohol; C) adding xylene the weight of which is 0.8-1.2 times of the total weight of the fatty acid and the higher alcohol, heating to 140-180 DEG C, and reacting for 6-8 h; D) extracting the xylene under vacuum and cooling to the room temperature; E) adding a pour point depressant the weight of which is 10-35% of the total weight of the fatty acid and the higher alcohol, and stirring for 30 min; and F) filtering and discharging. According to the method, the unsaturated fatty acid and the higher alcohol which are excellent in lubrication in molecular structures are adopted to synthesize an aliphatic ester by utilizing the acid catalyst, and the acid value of the polymer is not more than 20 and is much lower than the acid value 20 of common fatty acids.

Description

technical field [0001] The invention relates to a preparation method of a low-sulfur diesel oil lubrication improver. Background technique [0002] With the development of technology in various countries, the development of diesel engines is becoming more and more rapid, which also leads to the continuous increase of diesel consumption, and the pollution of the environment after diesel combustion is also becoming more and more serious. With the promulgation of China's new fuel oil standards, there are further requirements for reducing the sulfur content in diesel, but the reduction of sulfur content will bring about the problem of the reduction of the lubricating performance of diesel oil itself, and the wear and tear of diesel engines. Increase. Therefore, it is urgent to develop an additive that can improve the lubricity of low-sulfur diesel oil. Traditional low-sulfur diesel lubricity improvers are mainly fatty acids or fatty acid esters. Due to the high acid value of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/08C10L1/14
Inventor 蒋明李杰郭朝彬
Owner JIANGSU JIAHUA ADVANCED MATERIALS TECH
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