Lubricity improver for low-sulfur and low-freezing-point diesel oil

A low-sulfur diesel oil and lubricity technology, applied in the field of chemical product preparation, can solve the problems of reducing the oxidation stability of diesel oil, carbon deposits in fuel nozzles, and affecting the quality of diesel oil, so as to improve the lubricity of low-sulfur diesel oil and reduce friction and wear , the effect of adding a small amount

Active Publication Date: 2017-08-04
XIANYANG DONGQING PETROLEUM CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the known acid-type diesel lubricity improvers still have their own shortcomings, that is, carboxylic acid additives are prone to acid-base neutralization reactions with dispersants with high alkali values ​​in diesel oil, and it is very difficult to generate corresponding carboxylic acid-type metal salts. Deposition is easy to occur, causing carbon deposits in fuel nozzles, affecting combustion efficiency and polluting the environment
In addition, the existing acid-type diesel lubrication improvers are mainly imported products from abroad, which are relatively expensive. At the same time, the high acid value may cause carbon deposits in the fuel nozzle, which affects combustion efficiency and diesel quality, thereby reducing the oxidation stability of diesel.

Method used

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  • Lubricity improver for low-sulfur and low-freezing-point diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A novel low-sulfur low-condensation-point diesel oil lubricity improver consists of 85% long-chain unsaturated fatty acid, 10% polyisobutylene succinic anhydride and 5% sorbitan fatty acid monoester (dispersed agent) composition. The long-chain unsaturated fatty acid is composed of 55% linoleic acid, 32% soybean oleic acid and 13% linolenic acid according to the mass percentage, polyisobutylene succinic anhydride is composed of T2007A, sorbitan fatty acid monosodium Esters are glycerides.

[0021] The preparation method of the low-sulfur low-condensation-point diesel oil lubricity improver is as follows: first, linoleic acid, soybean oleic acid, and linolenic acid are mixed in proportion to obtain long-chain unsaturated fatty acids; then long-chain unsaturated fatty acids, T2007A and Glycerides were added into the mixing tank in proportion, heated to 40°C, stirred thoroughly for 20 minutes, and then filtered with a 70-mesh stainless steel filter to obtain the finished ...

Embodiment 2

[0028] A novel low-sulfur low-condensation-point diesel oil lubricity improver consists of 90% long-chain unsaturated fatty acid, 5% polyisobutylene succinic anhydride and 5% sorbitan fatty acid monoester (dispersed agent) composition. The long-chain unsaturated fatty acid is composed of 55% linoleic acid, 32% soybean oleic acid and 13% linolenic acid according to the mass percentage, polyisobutylene succinic anhydride is composed of T2007A, sorbitan fatty acid monosodium Esters are glycerides.

[0029] The preparation method of the low-sulfur low-condensation-point diesel lubricity improver is the same as that in Example 1.

[0030] Comparative Test

[0031] Three kinds of diesel oils with different lubricating properties were added with different doses of the diesel lubricity improver given in Example 2 of the present invention, and the wear scar diameter and the total insoluble matter of diesel oxidation stability were tested. The specific results are shown in Table 2 bel...

Embodiment 3

[0036] A novel low-sulfur low-condensation-point diesel oil lubricity improver consists of 93% long-chain unsaturated fatty acid, 5% polyisobutylene succinic anhydride and 2% sorbitan fatty acid monoester (dispersed agent) composition. The long-chain unsaturated fatty acid is composed of 55% linoleic acid, 32% soybean oleic acid and 13% linolenic acid according to the mass percentage, polyisobutylene succinic anhydride is composed of T2007A, sorbitan fatty acid monosodium Esters are glycerides.

[0037] The preparation method of the low-sulfur low-condensation-point diesel lubricity improver is the same as that in Example 1.

[0038] Comparative Test

[0039] Three kinds of diesel oils with different lubricating properties were added with different doses of the diesel oil lubricity improver given in Example 3 of the present invention, and the wear scar diameter and the total insoluble matter of diesel oxidation stability were tested. The specific results are shown in Table 3...

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Abstract

The invention relates to a novel low-sulfur and low-freezing-point diesel lubricant improver for producing high-power clean diesel. The novel low-sulfur and low-freezing-point diesel lubricant improver comprises long-chain unsaturated fatty acid, polyisobutylene succinic anhydride and dispersant. A preparation method of the lubricant improver includes the steps: adding components into a mixed kettle; increasing the temperature to reach 35-50 DEG C; sufficiently stirring a mixture for 15-30 minutes; filtering the mixture by a 70-mesh filter screen to obtain the lubricant improver. The diesel lubricant improver is free from heavy metal and poison, less in addition and convenient to use and has good low-temperature stability, the compatibility between the improver and diesel is good, low-sulfur diesel lubricating properties can be remarkably improved, nozzle abrasion of a diesel engine is effectively reduced, and carbon deposition is decreased.

Description

technical field [0001] The invention belongs to the technical field of preparation of chemical products, and relates to a diesel additive, in particular to a novel low-sulfur and low-condensation-point diesel lubricity improver which can be used to produce high-powered clean diesel. Background technique [0002] As the country and all walks of life pay more and more attention to environmental protection issues, the production of high-quality oil products has become the development direction of the modern oil refining industry. In terms of diesel production, the improvement of oil standards is mainly reflected in the reduction of sulfur content. In order to meet the low-sulfur requirements of diesel and improve the exhaust quality of diesel engines, oil refineries at home and abroad generally adopt deep processing and refining technologies such as hydrodesulfurization to make diesel oil develop in the direction of low sulfur. However, when the sulfur and aromatics in diesel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/188C10L1/198C10L1/19C10L10/08
CPCC10L1/143C10L1/1802C10L1/1881C10L1/19C10L1/198C10L10/08
Inventor 郭金鹏
Owner XIANYANG DONGQING PETROLEUM CHEM
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