Application of modified biological diesel oil as low sulfur diesel oil antiwear agent

Abstract

The invention provides a method of applying modified biodiesel as low sulfur diesel antiwear agent, comprising: adding modified biodiesel of 10- 2000ppm into low sulfur diesel, said modified biodiesel is produced through a 1-20 hour reaction with biodiesel and fatty alcohol or organic amine according to molar ratio of 1: 0.1- 5 at 50- 300 Deg. C . The biodiesel is the product of exchange between natural oil and fat and ester of low-carbon alcohol. By adding modified biodiesel into diesel with sulfur concentration lower than 500ppm can dramatically improve the lubricating property for low sulfur diesel.

Description

technical field [0001] The invention belongs to diesel antiwear agent, specifically an additive (also called lubricity additive) for improving the lubricity of low-sulfur diesel oil, so as to prevent diesel engines from burning fuel with poor lubricity and causing pump wear. technical background [0002] As countries around the world pay more and more attention to environmental protection issues, in order to reduce diesel exhaust pollution and produce high-quality clean diesel oil, it has become the development direction of the modern oil refining industry. This kind of diesel oil generally has the characteristics of low sulfur content, low aromatics content, high cetane number, and light distillate. Studies have shown that sulfur is the most harmful element that increases CH and CO in diesel engine emissions, especially inhalable particulate matter (PM), so reducing the sulfur content in diesel is particularly important for improving air pollution. Now the diesel specifica...

AI Technical Summary

Problems solved by technology

Although these products have the advantages of easy-to-obtain raw materials and relatively cheap prices, their use effects are relatively poor. At the same time, due to their high viscosity, they are easy to precipitate at low temperatures, which also brings inconvenience to their practical applications.

[0007] Biodiesel can also be directly used as an antiwear agent for low-sulfur diesel oil. It has almost no effect when the amount added is small. Generally, when the amount is greater than 0.5%, the effect is equivalent to that of commonly used antiwear agents at 0.005% to 0.02%. It is less economical as an additive

[0008] US5,891,203 discloses the combined use of biodiesel and fatty acid diethanolamine derivatives as a diesel antiwear agent, but it also has problems such as compatibility and relatively high cost of producing antiwear agents with fatty acids as raw materials