Production method of epoxidized soybean oil

Abstract

The invention discloses a production method of epoxidized soybean oil. The invention adopts a two-step synthesis method, and the method includes the steps of: (1) adding hydrogen peroxide, formic acidand a catalyst into a high-pressure reaction kettle, conducting stirring and cooling to obtain peroxyformic acid; (2) adding soybean oil dropwise into the peroxyformic acid obtained by step (1), introducing oxygen, performing stirring and carrying out pressurizing reaction to obtain a crude epoxidized soybean oil product; and (3) conducting alkali washing, water scrubbing and reduced pressure distillation on the crude epoxidized soybean oil product obtained by step (2) to obtain an epoxidized soybean oil finished product. Compared with the prior art, the method provided by the invention has the advantages of low cost, good reaction temperature controllability, fast reaction speed and few by-product, and the obtained product has good quality.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical synthesis, and in particular relates to a production method of epoxidized soybean oil. Background technique [0002] Epoxidized soybean oil is currently widely used non-toxic non-benzene environment-friendly plastic additives-plasticizer. It has the dual properties of plasticization and thermal stability, and is non-toxic, safe and environmentally friendly. Therefore, it is widely accepted by the plastic products industry. It is widely used in plastics, coatings, new polymer materials, rubber and other industrial fields. With the improvement of environmental protection awareness in various countries in the world, the toxicity of plasticizers has attracted more and more attention; plasticizer phthalates are suspected of causing cancer, and many developed countries have banned their use in medical and food packaging, daily necessities , toys and other plastic products. In addition, due ...

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Problems solved by technology

[0004] CN86104989A discloses a kind of production method of epoxy soybean oil, this method reacts 7~8 hours with soybean oil, 39% hydrogen peroxide, concentrated sulfuric acid, glacial acetic acid, one-step synthesis product epoxy soybean oil, epoxy value is at 6.0-6.4, The epoxy group generated by this method is easy to open the ring, especially in the later stage of epoxidation, because the concentration of oxidant hydrogen peroxide decreases, the epoxidation speed is slow, the production cycle is long, and the reaction temperature is not easy to control

Among them, the specific steps of series connection epoxidation treatment are as follows: (1) Add soybean oil, hydrogen peroxide, formic acid and concentrated sulfuric acid into the first reaction kettle connected in series according to the ratio and keep stirring, and react under the condition of 60-80°C. After 2.5-4.0 hours, remove the water layer to obtain epoxidized soybean oil A; (2) mix epoxidized soybean oil A, hydrogen peroxide, formic acid and concentrated sulfuric acid in a mass ratio of 1: 0.84-0.90: 0.03-0.10: 0.004 -0.006 is added to the second reaction kettle and continuously stirred, wherein the concentration of hydrogen peroxide is 23-26%, under the condition of 70-80°C, react for 2-3.5 hours, and divide and remove the water layer to obtain epoxidized soybean oil B; (3 ) adding epoxidized soybean oil B, hydrogen peroxide, formic acid and concentrated sulfuric acid to the third reaction kettle in a mass ratio of 1:0.5-0.9:0.04-0.10:0.003-0.006, wherein the concentration of hydrogen peroxide is 50% , under the condition of 65-75 ℃, react for 2-3.5 hours, divide and remove the water layer to obtain the crude product of epoxidized soybean oil; the water consumption of this invention is large, the subsequent sewage treatment cost is high, and the epoxidation temperature is relatively high, and the epoxidation The speed is fast, which is conducive to the epoxidation reaction to the target product, but at the same time, the high temperature will accelerate the occurrence of side reactions such as hydrolysis, which will affect the quality of the product

[0006] At present, the non-solvent synthesis of epoxidized soybean oil still has low epoxy value of the product (the bottleneck of epoxy value in the domestic industry is 6.5g / 100gESO), many by-products, relatively complicated post-treatment, high reaction temperature, and long reaction time and the high cost of the catalyst

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