Preparation method of methyl epoxidized fatty acid

Abstract

The invention relates to a method for preparing epoxy fatty acid methyl ester based on ionic liquid catalysis, comprising the following steps that: 100 portions of fatty acid methyl ester with the iodine value of more than 80 or biodiesel oil, 10 to 30 portions of methanoic acid, and 1 to 10 portions of ionic liquid catalyst are evenly mixed, and then are stirred to increase the temperature to between 50 and 70 DEG C; 30 to 70 portions of hydrogen peroxide with the concentration of between 28 and 55 percent is dripped and is controlled to finish within two hours; the heat insulation is continued for 3 to 6 hours, and the reaction is stopped when the epoxy value of the product is up to more than 3.0. The catalyst is removed, and epoxy fatty acid methyl ester is obtained by quickly and centrifugally separating. The method is characterized in that: ionic liquid is used as the catalyst; compared with the prior method using concentrated sulfuric acid as the catalyst, the process has the advantages of quick reaction speed, short process flow, simple post-treatment, low corrosiveness, clean process, repeatedly used catalyst and so on, and has strong industrial application prospect.

Description

A kind of preparation method of epoxy fatty acid methyl ester technical field The invention relates to a method for preparing epoxy fatty acid methyl ester, in particular to a method for preparing epoxy fatty acid methyl ester by using ionic liquid to catalyze fatty acid methyl ester. Background technique With the enhancement of people's awareness of environmental protection, higher hygiene requirements are put forward for plastic additives. Epoxy fatty acid methyl ester has become an important plasticizer due to its minimal toxicity and excellent thermal stability, light stability, water resistance and oil resistance. The traditional synthesis method is to react fatty acid methyl ester, formic acid, and hydrogen peroxide under the action of concentrated sulfuric acid catalyst at 45-65°C for several hours, and after the reaction is completed, let stand for 15 minutes to separate layers and remove the water phase. The upper oil phase was washed twice with saturated brine a...

AI Technical Summary

Problems solved by technology

Fatty acid methyl ester 100