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Method for preparing epoxidized soybean oil or epoxy fatty acid methyl (ethyl) ester through catalysis of organic rhenium oxide-urea peroxide

A technology of epoxidized fatty acid and epoxidized soybean oil, which is applied in organic chemistry, fatty acid production, fatty acid chemical modification, etc., can solve problems such as equipment corrosion, complicated operation, and reduced catalytic activity, and achieve low corrosiveness, simple post-treatment, The effect of simple process operation

Inactive Publication Date: 2009-12-02
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods have disadvantages such as complicated operation, serious corrosion of equipment, difficult wastewater treatment, and high cost.
Yu Bingchuan and others used strong acid cation exchange resin as catalyst to prepare epoxy soybean oil ["Study on the Synthesis of Epoxy Soybean Oil by Improved Solvent-free Process", China Oils and Fats, Volume 30, No. 4, 2005], but the same The use of carboxylic acid cannot be avoided; and the resin will swell during use, resulting in a decrease in its catalytic activity, and a large amount of acidic wastewater will be generated when the resin is regenerated. These problems limit the application of cationic resins

Method used

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  • Method for preparing epoxidized soybean oil or epoxy fatty acid methyl (ethyl) ester through catalysis of organic rhenium oxide-urea peroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In the reactor, add a certain amount of iodine and the value is 130g I 2 / 100g of soybean oil with an acid value less than 0.5mg KOH / g, add a rhenic acid catalyst according to 0.1% of the weight of the raw soybean oil, stir vigorously and keep the temperature at 40°C, slowly add the Carbamide peroxide; the reaction stopped after 8h. After resting, the water layer was separated, and the oil layer was distilled under reduced pressure, and the temperature was controlled below 110°C. The epoxy value of the epoxidized soybean oil was 7.1%, and the conversion rate was greater than 99%.

Embodiment 2

[0024] In the reactor, add a certain amount of iodine and the value is 145g I 2 / 100g of soybean oil with an acid value less than 0.5mg KOH / g, add methyl rhenium trioxide catalyst according to 0.3% of the weight of the raw soybean oil, stir vigorously and keep the temperature at 20°C, slowly add and the weight ratio of the raw soybean oil is 1 : 0.6 carbamide peroxide; stop after 4 hours of reaction. After resting, the water layer is separated, the oil layer is distilled under reduced pressure, the temperature is controlled below 110° C., the epoxy value of the epoxidized soybean oil is 7.8%, and the conversion rate is greater than 99%.

Embodiment 3

[0026] In the reactor, add a certain amount of iodine and the value is 108gI 2 / 100g fatty acid methyl ester with an acid value less than 2mg KOH / g, add benzyl rhenium trioxide catalyst according to 0.2% of the weight of the raw material fatty acid methyl ester, stir vigorously and keep the temperature at 20°C, slowly add the weight of the raw material fatty acid methyl ester The ratio of carbamide peroxide is 1:1; the reaction stops after 6h. After resting, the water layer was separated, the oil layer was distilled under reduced pressure, the temperature was controlled below 110°C, the epoxy value of the epoxy fatty acid methyl ester was 6.16%, and the conversion rate was greater than 99%.

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Abstract

The invention discloses a method for preparing epoxidized soybean oil or epoxy fatty acid methyl (ethyl) ester through the catalysis of organic rhenium oxide-urea peroxide, which belongs to the technical field of liquid-phase catalytic epoxidation. The method utilizes a biomass material, namely soybean oil or unsaturated fatty acid methyl (ethyl) ester, adopts organic rhenium oxide as a catalyst, utilizes urea peroxide to react to synthesize the epoxidized soybean oil or the epoxy fatty acid methyl (ethyl) ester under the conditions without carboxylic acid and protonic acid, and avoids the use of strong acid catalysts during the epoxidation, so the method has small corrosion on equipment; the method avoids the use of the carboxylic acid, makes the post-treatment simple, and has no wastewater; and the method ensures that the process has simple operation, meets the requirement of epoxidized clean production, and is environment-friendly. The product can be taken as a plasticizer to be widely applied to nontoxic polyvinyl chloride (PVC) products and transparent PVC products, namely industrialized products such as transparent bottles, transparent boxes, food and drug packing materials, medical PVC 'blood transfusion bags', environment-friendly photocurable coatings and the like.

Description

technical field [0001] A method for preparing epoxidized soybean oil or epoxy fatty acid A (B) ester by liquid-phase catalysis of organic rhenium oxides, the invention relates to a method for preparing epoxidized soybean oil or epoxy fatty acid A (B) without proton acid and carboxylic acid The method for ester belongs to the technical field of liquid-phase catalytic epoxidation. Background technique [0002] Epoxy soybean oil and epoxy fatty acid methyl (b) ester are non-toxic and environmentally friendly plasticizer additives used earlier, which have very good plasticizing and thermal stabilizing effects. They are used in plastics, coatings, new polymer materials, rubber It has a wide range of applications in industrial fields. With the improvement of environmental protection awareness in all countries in the world, the toxicity of plasticizers has attracted more and more attention. The main plasticizers, phthalates, are suspected of being carcinogenic, and many developed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/00C07D303/42C07D301/19
Inventor 蒋平平陈旻叶夏卢云
Owner JIANGNAN UNIV
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