Method for preparing epoxidized soybean oil by using lipase catalysis

A technology for the preparation of epoxidized soybean oil and catalysis, which is applied in the field of preparation of epoxidized soybean oil, can solve the problems of low production energy consumption, and achieve the effects of less by-products, high product purity, and mild reaction conditions

Inactive Publication Date: 2015-04-29
CHINESE ACADEMY OF SCI THE JIAXING MATERIALS & CHEM TECH ENG CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for preparing epoxidized soybean oil by lipase catalysis. The method has mild reaction condit...

Method used

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  • Method for preparing epoxidized soybean oil by using lipase catalysis
  • Method for preparing epoxidized soybean oil by using lipase catalysis

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Embodiment 1

[0027] In the hydrogen peroxide solution whose mass concentration is 30%, add 0.15wt% stabilizer EDTA, start to stir, after it dissolves completely, add urea, the molar ratio of described urea and hydrogen peroxide is 1:1.1, in Under constant stirring, heat up to 32°C, wait until urea is completely dissolved, keep warm for 25 minutes, then cool to -5°C for crystallization for 4 hours, obtain white crystals after suction filtration, dry at 50°C for 2 hours to obtain urea hydrogen peroxide.

Embodiment 2

[0029] In the hydrogen peroxide solution whose mass concentration is 40%, add 0.25wt% stabilizer EDTA, start to stir, after it dissolves completely, add urea, the molar ratio of described urea and hydrogen peroxide is 1:1.1, in Under constant stirring, heat up to 35°C, wait until urea is completely dissolved, keep it warm for 30 minutes, then cool to -5°C for crystallization for 5 hours, obtain white crystals after suction filtration, dry at 60°C for 2 hours to obtain urea hydrogen peroxide.

Embodiment 3

[0031] Mix 200g soybean crude oil, 1g stearic acid, 1g palmitic acid, 1g Tween 20, 1g Span 80, and 5g lipase evenly, stir and heat up to 20°C, then add 10g urea hydrogen peroxide, and react for 5h, Sampling, centrifugation, alkali washing and water washing for three times, and finally drying with calcium chloride to obtain epoxidized soybean oil product.

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Abstract

The invention discloses a method for preparing epoxidized soybean oil by using lipase catalysis. The method comprises the following steps: uniformly mixing the following components in parts by weight: 150-250 parts of soybean oil, 1-3 parts of organic acid, 1-3 parts of a surfactant and 3-8 parts of lipase, stirring and heating to the temperature of 20-22 DEG C; adding 10-14 weight parts of urea hydrogen peroxide, reacting for 5-8 hours, sampling, centrifuging, performing alkali wash, washing, and finally performing calcium chloride drying, thereby obtaining the epoxidized soybean oil product. According to the method disclosed by the invention, the urea hydrogen peroxide serves as an oxygen source, and the epoxidized soybean oil is prepared by using a lipase catalysis reaction, so that high epoxy value is obtained from the reaction, the enzyme maintains high activity and is difficult to inactivate, the reaction conditions are mild, the energy consumption is low, the catalytic reaction is high in specificity, byproducts are difficult to produce, and the product is high in purity and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of preparation of epoxidized soybean oil, in particular to a method for preparing epoxidized soybean oil by using urea hydrogen peroxide as an oxygen source and utilizing lipase to catalyze. Background technique [0002] Vegetable oil-based plasticizers use natural vegetable oils to modify the structure of glycerides through functional group reactions to improve the compatibility of vegetable oils with PVC. The current research results in this area are mainly epoxidized grease. Epoxidized soybean oil is an epoxy plasticizer developed and applied earlier at home and abroad, and it is widely used in the field of PVC. In recent years, the output has continued to grow, and the consumption of epoxy plasticizers in the United States is second only to phthalic acid and aliphatic dibasic acid esters, accounting for the third place in consumption. Epoxidized soybean oil not only has a plasticizing effect on PVC, bu...

Claims

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Application Information

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IPC IPC(8): C12P7/64
CPCC12P7/64
Inventor 甄曰菊章俭司同薛莲
Owner CHINESE ACADEMY OF SCI THE JIAXING MATERIALS & CHEM TECH ENG CENT
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