Method for preparing lubricant from biodiesel

Abstract

The invention discloses an epoxidation, isomerization and esterification process for preparing lubricant from biodiesel and relates to a process for preparing alcohol-ester-type environment-friendly lubricant base oil by using solid acid as a catalyst, and belongs to the technical field of lubricant modification processes. According to the process, the biodiesel (fatty-acid methyl ester) is subjected to epoxidation by using hydrogen peroxide, formic acid and the solid-acid catalyst, and thus, double bonds are saturated; and long-chain fatty acid is adopted to carry out isomerization and esterification reaction under the participation of the solid-acid catalyst, unstable epoxy bonds are opened, and thus, isomerized biodiesel grease monoester is obtained. The solid-acid catalyst used by the process has the characteristics of good stability, easiness in separation, and environment friendliness.

Description

technical field

[0001] The invention belongs to the technical field of biodiesel modification technology, and in particular relates to a method for preparing lubricating base oil through high-quality modification of epoxy biodiesel. Background technique

[0002] According to statistics, about 5 million to 10 million tons of petroleum-based chemicals enter the biosphere every year in the world. Even in countries with high lubricant recycling rates (greater than 60%), 4% to 10% of lubricants still enter the environment. In the European Community, 600,000 tons of lubricating oil enter the environment every year. The oils that cause these problems are hydraulic oils in circulating systems and once-through lubricating oils such as chain saw oils, two-stroke engine oils, railway track lubricants, open gear oils, and lubricants such as wire grease. The lubricant entering the environment seriously pollutes land, rivers and lakes, and also seriously endangers the ecological environm...

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