Method for preparing epoxy flax oil by catalytic oxidation of lipase

A technology of oxidized linseed oil and epoxidized linseed oil, which is applied in the direction of chemical recovery and fermentation, can solve the problems of high epoxy value, difficult to control the iodine value and acid value of the product, and cannot be obtained, so as to achieve mild reaction conditions, The effect of saving raw materials and low product cost

Inactive Publication Date: 2008-07-30
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the action of the acid, this method is effective in making the H 2 o 2 While the activity of O in the + It will also cause the ring-opening of the epoxy bond to produce by-products, so it is difficult to control the iodine value and acid value of the product, and it is impossible to obtain a product with a higher epoxy value

Method used

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  • Method for preparing epoxy flax oil by catalytic oxidation of lipase
  • Method for preparing epoxy flax oil by catalytic oxidation of lipase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a 150ml flask, add 10.0g linseed oil, 2.5g formic acid, 10g petroleum ether solvent, 0.04g catalyst novo435;

[0023] In a constant temperature water bath with a magnetic stirring temperature of 50°C, slowly start to add 10g of hydrogen peroxide with a concentration of 30%. The addition is completed in 20 minutes, and then continue to react at 50°C for 8 hours;

[0024] After the reaction is completed, the enzyme catalyst is filtered off, the filtrate is transferred to a separatory funnel for layering, the organic phase is taken and washed with water until it is neutral, and the solvent is evaporated under reduced pressure at 50° C. to obtain the product epoxy linseed oil.

[0025] Epoxy linseed oil has epoxy value = 8.8, iodine value = 8.2, acid value = 0.37.

Embodiment 2

[0027] In a 150ml flask, add 10.0g linseed oil, 2.5g acetic acid, 4.0g chloroform solvent, 0.5g catalyst novo435;

[0028] Slowly start adding 15g of hydrogen peroxide with a concentration of 10% in a constant temperature water bath with a magnetic stirring temperature of 45°C. The addition is completed in 20 minutes, and then continue the reaction at 45°C for 4 hours;

[0029] After the reaction, the enzyme catalyst is removed by filtration, the filtrate is transferred to a separatory funnel for layering, the organic phase is taken and washed with water to neutrality, and the solvent is evaporated under reduced pressure at 55° C. to obtain the product epoxy linseed oil.

[0030] Epoxy linseed oil has epoxy value = 8.5, iodine value = 9.4, acid value = 0.48.

Embodiment 3

[0032] Add 10.0g linseed oil, 10g dichloroacetic acid, 8.0g benzene solvent, 0.1g catalyst novo435 in a 150ml flask;

[0033] Slowly start adding 12g of 50% hydrogen peroxide dropwise in a constant temperature water bath with a magnetic stirring temperature of 60°C. The addition is completed in 20 minutes, and then continue to react at 60°C for 6 hours;

[0034] After the reaction is completed, the enzyme catalyst is removed by filtration, the filtrate is transferred to a separatory funnel for layering, the organic phase is taken and washed with water to neutrality, and the solvent is evaporated under reduced pressure at 60° C. to obtain the product epoxy linseed oil.

[0035] Epoxy linseed oil has epoxy value = 9.2, iodine value = 7.0, acid value = 0.45.

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Abstract

The invention relates to a method in which lipase can be used for catalyzing and oxidize linseed oil to prepare epoxidized linseed oil. The method is that refined linseed oil, solvent, organic acid and catalyst can be added into a reaction container which is positioned in a constant-temperature water bath; and then hydrogen peroxide can be dropped into to conduct the reaction. Lipase catalyst can be recycled by filtering, and filtrate can be moved into a separating funnel to separate out organic phases. And then the organic phases can be decompressed and distilled after being diluted to be neutral to obtain the outcome epoxidized linseed oil. The operational art of the method is simple, and the reaction condition is moderate. In addition, organic acid, solvent and catalyst which are added all can be recycled and reused; and another material hydrogen peroxide can be converted into water without pollution after the reaction, thereby avoiding producing a large amount of industrial pollution and saving material; moreover, the cost of the outcome is low, which meets the current requirements of green chemical and atomic economy.

Description

Technical field [0001] The invention relates to a method for preparing epoxy linseed oil by catalytic oxidation of linseed oil under the combined action of lipase, hydrogen peroxide and organic acid. Background technique [0002] Epoxy vegetable oil is a compound containing a three-membered epoxy structure, which not only plasticizes polyvinyl chloride, but also quickly absorbs hydrogen chloride released due to the degradation of heat and light, reducing unstable hydroxychloroallyl groups The formation of conjugated double bonds prevents the continuous decomposition of polyvinyl chloride plastics, so it acts as a stabilizer. In addition, it can be used in combination with polyester plasticizers to reduce the migration of polyester; it can also be used with organic metal salt stabilizers to produce a synergistic effect and reduce the amount of organic metal salt. [0003] Epoxy vegetable oil plasticizers mainly include epoxy soybean oil, epoxy cottonseed oil and epoxy rape oil. Ep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P17/02
CPCY02P20/584
Inventor 吾满江·艾力哈丽丹·买买提宋平夏木西卡马尔·买买提阿依夏木古丽·努尔艾买提
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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