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Method for preparing epoxidized soybean oil or epoxy fatty acid methyl(ethyl) ester by heteropolyacid liquid phase catalysis

A technology of epoxidized soybean oil and epoxidized fatty acid, which is applied in the direction of organic chemistry, can solve the problems of reduced catalytic activity, difficult wastewater treatment, equipment corrosion, etc., and achieves the effects of simple operation, avoiding difficult recovery, and low corrosion

Inactive Publication Date: 2008-08-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 by heteropolyacid liquid phase catalysis
  • Method for preparing epoxidized soybean oil or epoxy fatty acid methyl(ethyl) ester by heteropolyacid liquid phase catalysis

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Experimental program
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Effect test

Embodiment 1

[0024] In the reactor, add a certain amount of iodine and the value is 130gI 2 / 100g of soybean oil, the acid value is less than 0.5mgKOH / g, add phosphotungstic heteropoly salt catalyst according to 5%-8% of the weight of raw soybean oil, stir vigorously and heat up to 50°C-60°C; maintain this temperature, drop Add hydrogen peroxide solution (concentration: 35%) equal to the weight of the raw material soybean oil, drop it in 2h-3h, and stop after 3h-5h of reaction. After resting, the water layer is separated, and the oil layer is distilled under reduced pressure, and the temperature is controlled below 110°C. The epoxy value of the product is 5.6%, and the conversion rate is greater than 99%.

Embodiment 2

[0026] In the reactor, add a certain amount of iodine and the value is 130gI 2 / 100g soybean oil, the acid value is less than 0.5mgKOH / g, add peroxyphosphotungstic heteropoly salt catalyst according to 1%-2% of the weight of raw soybean oil, stir vigorously and heat up to 20°C-40°C; maintain the temperature , dropwise the hydrogen peroxide solution (concentration is 50%) of raw material soybean oil weight equivalence, 2h-3h dropwise, stop after reaction 3h-5h. After standing still, 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 product was 5.9%, and the conversion rate was greater than 99%.

Embodiment 3

[0028] In the reactor, add a certain amount of iodine and the value is 108gI 2 Soybean oil methyl oleate / 100g, the acid value is less than 2mg KOH / g, according to the 1%-2% of raw material soybean oil methyl oleate weight, add peroxophosphotungstic heteropoly salt catalyst, vigorously stir and heat up to 20 ℃-40 ℃; add dropwise a hydrogen peroxide solution (concentration: 27.5%) of 60% by weight of the raw material soybean oil methyl oleate, drop it in 1h-2h, and stop after 2h-4h of reaction. After resting, the water layer is separated, and the oil layer is distilled under reduced pressure, and the temperature is controlled below 110°C. The epoxy value of the product is 4.2%, and the conversion rate is greater than 99%.

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Abstract

A heteropoly acid liquid-phase catalysis preparation method of epoxy soybean oil or epoxy fatty acid methyl ester (ethyl ester) belongs to liquid-phase catalysis oxidization technical field, which utilizes biomass soybean oil and unsaturated fatty acid methyl ester (ethyl ester) and uses solid heteropoly acid salt compound as catalyst, without carboxyl acid, protonic acid and solvent, to synthesize epoxy soybean oil or epoxy fatty acid methyl ester (ethyl ester) via hydrogen dioxide solution reaction, without acid waste water generation in epoxidation to protect environment. The epoxy soybean oil or epoxy fatty acid methyl ester (ethyl ester) can be used as plasticizer to be widely used in non-toxic polyvinyl chloride (PVC) product and transparent PVC product, as transparent bottle, transparent box, food and drug package, PVC medical blood bag and environment-friend uv-curing coating or the like.

Description

technical field [0001] A method for preparing epoxidized soybean oil or epoxy fatty acid methyl (b) ester by heteropolyacid liquid phase catalysis, the invention relates to a method for preparing epoxy soybean oil or epoxy fatty acid methyl under the condition of no proton acid, no carboxylic acid and no solvent (B) The method of 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 carcin...

Claims

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Application Information

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IPC IPC(8): C07D301/12C07D303/38
Inventor 蒋平平施赛泉史润萍陈旻
Owner JIANGNAN UNIV
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