Rapid and green preparation method of epoxidation soybean oil

A technology of epoxidized soybean oil and soybean oil, which is applied in the chemical modification of fatty acids and the production of fatty acids, can solve the problems of unfriendly environment, increase of enterprise cost, and unfriendly environment, and achieve simple production process and improve product quality , the effect of facilitating industrial production

Active Publication Date: 2014-07-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Production energy consumption is high, cost is high, mineral acid is used as an epoxidation catalyst, equipment is severely corroded, product separation and post-processing are complicated, the production process requires a large amount of alkaline water for neutralization and washing, serious environmental pollution, and serious safety hazards, and The product has many shortcomings such as low epoxy value, poor compatibility with PVC, unstable product quality, and discoloration at high temperature.
Han Lijuan et al.'s "Sulfuric Acid Catalysis Preparation of Epoxidized Soybean Oil Research under Ultrasonic Conditions" (Journal of Henan University of Technology, Volume 34, No. 2, 2010) although the obtained product epoxy value is higher and shortens the reaction time, but The use of inorganic acid is still not friendly to the environment, and ultrasonic treatment is added, which increases the cost of production
[0004] has the following reports about the green synthesis method of epoxidized soybean oil: Chinese patent application number is 200810018592.4 "Preparation of epoxy soybean oil or epoxy fatty acid methyl by liquid phase catalysis ( B) Ester Method" discloses a method for preparing epoxidized soybean oil with a catalyst. The method does not use carboxylic acid, protonic acid or solvent, and uses quaternary ammonium salts as catal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] In a 150 mL three-necked reaction flask, add 10g soybean oil, 0.3g phosphotungstic heteropoly acid catalyst, 30g solvent 1,2-dichloroethane, 6.5g surfactant PEG 100, and then heat to 60 ℃ with a constant temperature water bath ,Stir the reaction for 3.0 h, add 9g dropwise during the reaction process with a mass concentration of 30% H 2 O 2 . The filtrate was separated into the water layer, and the organic layer was distilled to remove the solvent with a rotary evaporator to obtain a light yellow transparent liquid. The epoxy value of the product is more than 6.30%, and the conversion rate is more than 90%.

Example Embodiment

[0026] Example 2

[0027] In a 150 mL three-necked reaction flask, add 10g soybean oil, 0.3g phosphotungstic heteropoly acid catalyst, 30g solvent 1,2-dichloroethane, add 10.4g surfactant PEG 600, and then use a constant temperature water bath to heat up to 60 ℃, the reaction was stirred for 4.0 h, and 7.5g was added dropwise during the process, with a mass concentration of 45% H 2 O 2 . The filtrate was separated into the water layer, and the organic layer was distilled to remove the solvent with a rotary evaporator to obtain a light yellow transparent liquid. The epoxy value of the product is more than 6.50%, and the conversion rate is more than 94%.

Example Embodiment

[0028] Example 3

[0029] In a 150 mL three-necked reaction flask, add 10g soybean oil, 0.5g phosphotungstic heteropoly acid catalyst, 30g solvent 1,2-dichloroethane, add 15.0g surfactant PEG 200, and then use a constant temperature water bath to heat up to 60 ℃, stir and react for 3.0h, add 9g of H with a mass concentration of 30% in the process 2 O 2 . The reacted solution is filtered to recover the phosphotungstic heteropoly acid catalyst. The filtrate was separated into the water layer, and the organic layer was distilled to remove the solvent with a rotary evaporator to obtain a light yellow transparent liquid. The epoxy value of the product is more than 6.30%, and the conversion rate is more than 92%.

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PUM

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Abstract

The invention relates to a fast and green method for preparing epoxidized soybean oil. After mixing soybean oil with a non-aqueous organic solvent, adding a heteropolyacid phase transfer catalyst and a surfactant polyethylene glycol, heating in a water bath, and reacting Hydrogen peroxide was added dropwise during the process. Separate the organic phase and distill under reduced pressure to obtain epoxidized soybean oil. The reaction time is 3.0-4.0h, the epoxidation value is greater than 6.30%, and the conversion rate is higher than 90%. In the present invention, by adding the surfactant polyethylene glycol, the production time is shortened, the process is simple, safe and non-toxic, the equipment is not damaged, the environment is friendly, and the product has high epoxidation value and conversion rate.

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, a safe and non-toxic plasticizer for food packaging materials. Background technique [0002] Plasticizers are indispensable additives in plastic products. The widely used plasticizers phthalates (PAEs) are highly volatile and will produce imitation estrogen after entering the human body, which has potential carcinogenicity. Sex, has been banned by the EU in toys, children's products, food packaging and medical equipment and other fields. Epoxidized soybean oil (ESO) is an environmentally friendly polyvinyl chloride (PVC) plasticizer and stabilizer obtained by treating soybean oil with peroxide. It has good heat resistance, light resistance, Interpenetration, low temperature flexibility, low volatility, non-toxic, can be used as a plasticizer for food and pharmaceutical plastic packaging materials. [0...

Claims

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Application Information

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IPC IPC(8): C11C3/00C08K5/1515
Inventor 刘国琴荆璐李琳刘新旗
Owner SOUTH CHINA UNIV OF TECH
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