Diesel antiwear composition and diesel composition and their preparation method

A technology of composition and anti-wear agent, which is applied in the fields of biofuel, petroleum industry, fuel additives, etc., can solve the problems of emulsification and turbidity of additive diesel oil, increased risk of corrosion, and large dosage.

Active Publication Date: 2021-07-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition is easy to block the filter screen at low temperature, and the two indicators of freezing point and saturated fatty acid cannot meet the requirements of Q / SHCG 57-2017
[0007] Although the cost of using fatty acid antiwear agents to solve the problem of diesel lubricity is relatively low, with the upgrade of diesel emission standards and the deterioration of lubricity, the dosage is too large, resulting in excessive acidity of diesel and increased risk of corrosion.
Although the amount of fatty acid ester type antiwear agent is used in a small amount, it also has high cost and the risk of emulsification and cloudiness of the added diesel oil when it meets water

Method used

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  • Diesel antiwear composition and diesel composition and their preparation method
  • Diesel antiwear composition and diesel composition and their preparation method
  • Diesel antiwear composition and diesel composition and their preparation method

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Experimental program
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preparation example Construction

[0037] In the second aspect, the diesel antiwear composition provided by the present invention can be prepared by esterifying unsaturated fatty acid and glycerol and carrying out molecular distillation of the product. The preparation of the diesel antiwear composition provided by the present invention The method includes the following steps:

[0038] (1) Esterifying a raw material containing a fatty acid with 10-25 carbon atoms and glycerol, wherein, in the raw material, the content of unsaturated fatty acid is more than 90% by weight and the content of saturated fatty acid is less than 2.5% by weight , the content of abietic acid and other unsaponifiable matter is below 2.5% by weight; in the reaction process, the maximum possible formation of fatty acid monoglycerides is generally made as far as possible in excess of the glycerin of the reaction, and the acid value of the reaction mixture drops to 6-60mgKOH / g and stops Esterification reaction.

[0039] (2) Molecular distill...

Embodiment approach

[0044] The source of the raw material can be vegetable oil, or tall oil fatty acid recovered from animal oil or papermaking waste liquid. In order to achieve the above-mentioned fatty acid composition, the crude fatty acid is generally refined first. The refining methods include rectification, film Evaporation, molecular distillation and other distillation methods remove impurities and unsaponifiable matter, and methods such as urea inclusion, solvent low-temperature freezing filtration, and pressure filtration can also be used to reduce the content of saturated fatty acids. According to a preferred embodiment of the present invention, the raw material is obtained from biodiesel through rectification, saponification and acidification.

[0045] In step (1), the esterification reaction can utilize conventional esterification methods, such as adding a catalyst or performing the reaction at high temperature without a catalyst. The catalyst can be an acid catalyst, a base catalyst ...

Embodiment 1

[0068] (1) Esterification reaction

[0069] 500g tall oil fatty acid (Arizonal company brand is 2LT product, cloud point-10 ℃) and 179.8g glycerol are placed in a reactor that electric stirrer, thermometer, reflux condenser, reflux water separator are housed, add 3.6 g solid superacid catalyst (Shandong Zibo Haoye Industry and Trade Co., Ltd.) heated and stirred to 190°C, purged with nitrogen to carry out the water generated by the reaction and condensed it into the water separator. After 6 hours of reaction, the acid value was measured to be 30.4mgKOH / g, at this moment, 23.1g of water was separated, and the reaction was stopped, and the catalyst was separated by sedimentation or filtration, and 642.7g of the reaction product was collected;

[0070] (2) Molecular distillation

[0071] 300 g of the reaction product from the previous step was subjected to a molecular distillation with a VKL70-5FDRR full-heating full-gear pump molecular distillation device of the German VTA com...

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Abstract

The invention provides a diesel antiwear composition, a diesel composition and a preparation method thereof. The composition contains (A): 80-97% by weight of fatty acid glycerides with 10-25 carbon atoms, and (B): 3-20% by weight of fatty acid with 10-25 carbon atoms. The acid value of the composition is 6-40mgKOH / g, the content of free glycerin is no more than 0.5%, and the content of saturated fatty acid is no more than 2.5% by weight. The preparation method of the composition of the present invention comprises combining the ester type antiwear agent (fatty acid glyceride) meeting the purchasing standard of Sinopec with not less than 80% by weight and the acid type antiwear agent (fatty acid) meeting the purchasing standard of Sinopec at not more than 20% by weight mix. The diesel antiwear composition provided by the invention can significantly improve the lubricity of low-sulfur diesel.

Description

technical field [0001] The invention relates to the field of fuels, in particular to a diesel antiwear composition, a diesel composition and their preparation methods. Background technique [0002] With the increasing attention to environmental issues around the world, the production of high-quality clean energy has become the development direction of the modern oil refining industry, and the production standards of diesel oil have gradually increased. This clean diesel has the characteristics of low aromatic content, high cetane number, light distillate, low sulfur and low nitrogen. Sulfur is the most harmful element that increases the content of pollutants in the atmosphere, so it is necessary to strictly control the content of sulfur compounds in diesel. The clean diesel currently produced is mainly produced by hydrogenation process. This method not only removes sulfur compounds in diesel, but also reduces the content of nitrogen-containing compounds and oxygen-containin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L10/08C10L1/10C11C3/06C10L1/188C10L1/19
CPCC10L1/10C10L1/1881C10L1/1915C10L10/08C11C3/06Y02E50/10
Inventor 蔺建民刘金胜李宝石李妍高岚黄燕民郭勇
Owner CHINA PETROLEUM & CHEM CORP
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