A kind of method that epoxidized fatty acid methyl ester prepares

A technology of fatty acid methyl ester and epoxidation, applied in fermentation and other directions, can solve problems such as prolonging process flow and increasing production cost, and achieves the effects of single product, avoiding hydrolysis and improving yield

Active Publication Date: 2019-06-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrolysis of methyl ester is a side reaction in the process of epoxidation catalyzed by lipase. To obtain epoxidized fatty acid methyl ester with low acid value, it is necessary to carry out deacidification treatment on the epoxidation reaction product, which prolongs the process flow and increases cost of production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 300 g of methyl oleate, 15 g of ethyl acetate, and 3 g of esterase AFEST into the reaction vessel, and start adding hydrogen peroxide (30% hydrogen peroxide) to start the epoxidation reaction after mixing uniformly, and add 100 g of hydrogen peroxide dropwise at a constant rate within 2 hours. The temperature of the reaction system was controlled to 60°C, and the stirring speed was 400 rpm. After the reaction was continued for 24 hours, the stirring was stopped to terminate the epoxidation reaction, the reaction mixture was allowed to stand for 5 minutes for stratification, and the upper organic phase was recovered. The ethyl acetate in the organic phase is recovered by vacuum distillation to obtain methyl epoxy oleate. After testing, the content of the epoxidized methyl oleate is 98.2%, and the acid value is 0.3mgKOH / g.

Embodiment 2

[0026] Add 300g of soybean oil fatty acid methyl ester, 3g of ethyl acetate, and 3g of esterase EstE1 into the reaction vessel. After mixing evenly, start adding hydrogen peroxide (30% hydrogen peroxide) to start the epoxidation reaction. Add 100g hydrogen peroxide dropwise at a constant rate within 2h . The temperature of the reaction system was controlled to 50°C, and the stirring speed was 400 rpm. After the reaction was continued for 24 hours, the stirring was stopped to terminate the epoxidation reaction, the reaction mixture was allowed to stand for 5 minutes for stratification, and the upper organic phase was recovered. The ethyl acetate in the organic phase is recovered by vacuum distillation to obtain the epoxidized soybean oil fatty acid methyl ester. After testing, the content of the epoxidized soybean oil fatty acid methyl ester is 83.5%, and the acid value is 0.26mgKOH / g.

Embodiment 3

[0028] Add 300g of soybean oil fatty acid methyl ester, 15g of ethyl acetate, 3g of esterase PestE into the reaction vessel, and start adding hydrogen peroxide (30% hydrogen peroxide) to start the epoxidation reaction after mixing, and add 50g of hydrogen peroxide dropwise at a constant rate within 2h . The temperature of the reaction system was controlled to 40°C, and the stirring speed was 400 rpm. After the reaction was continued for 24 hours, the stirring was stopped to terminate the epoxidation reaction, the reaction mixture was allowed to stand for 5 minutes for stratification, and the upper organic phase was recovered. The ethyl acetate in the organic phase is recovered by vacuum distillation to obtain epoxy fatty acid methyl ester. After testing, the content of the epoxidized fatty acid methyl ester is 91.7%, and the acid value is 0.26mgKOH / g.

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Abstract

The invention belongs to the field of biochemical engineering, and discloses a method for preparing epoxy fatty acid methyl ester. The method comprises the following steps that 1, esterase serves as a catalyst, ethyl acetate serves as a reaction assistant, and fatty acid methyl ester and hydrogen peroxide are subjected to an epoxidation reaction; 2, the reaction product is separated, an oil phase is recycled, and epoxy fatty acid methyl ester is obtained. A catalyzing process adopted in the method is mild in reaction condition, and no side effect occurs. The reaction product is single in ingredient and easy to separate and purify. Meanwhile, the yield of epoxy fatty acid methyl ester is increased, and the content of free fatty acid in epoxy fatty acid methyl ester is reduced.

Description

Technical field [0001] The invention relates to a method for epoxidizing fatty acid methyl esters. Background technique [0002] Fatty acid methyl ester is a very important chemical intermediate. However, a large number of carbon-carbon double bonds lead to poor oxidation stability. Therefore, the production of different types of fatty acid methyl ester derivatives by sulfonation and neutralization, hydrogenation, ethoxylation and transesterification of the double bonds has attracted much attention. Clean and environmental protection can be widely used in daily cosmetics, detergents and plastic processing industries. Epoxidized fatty acid methyl esters can be added to industrial polymer materials to enhance the plasticity of the polymer. EU and US studies on the toxicity of polyvinyl chloride (PVC) of traditional dioctyl phthalate (DOP) and dibutyl phthalate (DBP) plasticizers have found that DOP can cause tissue liver disease and cancer. Disrupting endocrine and other dangers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P17/02
CPCC12P17/02
Inventor 杨博周鹏飞王永华王卫飞蓝东明严慧玲王旭苹
Owner SOUTH CHINA UNIV OF TECH
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