Diesel lubrication modifier containing unsaturated fatty acid and application of unsaturated fatty acid as diesel lubrication modifier

Abstract

The invention provides a diesel lubrication modifier containing unsaturated fatty acid and application of the unsaturated fatty acid as the diesel lubrication modifier, wherein the diesel lubrication modifier has the advantages of low use level, low solidification point, good low-temperature fluidity and good lubrication performance. The diesel lubrication modifier contains unsaturated fatty acid and unsaturated fatty acid ester, wherein the unsaturated fatty acid is no less than 30 percent by weight and is shown as a formula (1), the unsaturated fatty acid ester is shown as a formula (2), and as a preferable scheme of the invention, R1 and R2 respectively contain 1-3 double-bonds. As for the application of the unsaturated fatty acid as the diesel lubrication modifier, the unsaturated fatty acid is shown as the formula (1). The invention is mainly used for improving the lubrication performance of diesel and has the advantages of low use level of 50-100 ppm, low solidification point being lower than 0 DEG C, good low-temperature fluidity and good lubrication performance.

Description

technical field [0001] The invention relates to a diesel lubricity improver containing unsaturated fatty acid and the application of the unsaturated fatty acid as the diesel lubricity improver, belonging to the field of fuel oil additives. Background technique [0002] In the late 1980s and early 1990s, in order to avoid the pollution of the environment caused by the toxic substances in the exhaust of diesel engines, economically developed countries compelled to greatly reduce the content of sulfur and aromatics in diesel. Immediately afterwards, large-scale fuel pump failure accidents occurred in Sweden, parts of the United States and Canada, countries and regions where the sulfur content of diesel oil has been greatly reduced. The reason for these failure accidents is that diesel is not only used as engine fuel, but also as a lubricant for oil transfer pumps and high-pressure oil pumps. The sulfur content of hydrorefined diesel oil is low, and the content of aromatics and ...

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Problems solved by technology

There are also reports about non-acid lubricating additives in China. CN1424387A discloses a modified castor oil lubricant, which is mainly composed of monohydroxy castor oil ester, dihydroxy castor oil ester and trihydroxy castor oil ester. Large molecular weight, the molecular characteristics do not conform to the properties of diesel oil, sticky valve, not conducive to combustion, black smoke will be generated during the combustion process of diesel engines, and it is not easy to be used as a diesel lubricity improver

The performance of non-acid type lubricants is worse than that of acid type lubricants, and the addition amount is relatively large, generally above 100ppm to have a certain effect, the addition amount is large, the cost of diesel oil is increased, and some synthesis processes are relatively complicated. Industrial diesel oil only uses fat Less acidic

[0006] The essence of heavy oil lubricants can be understood as adding more olefin content to increase the lubricity of diesel oil, which violates the purpose of reducing sulfur and olefins in diesel oil, and is generally rare in practical applications

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