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A kind of high-efficiency preparation process of epoxidized soybean oil

An epoxidized soybean oil, high-efficiency technology, applied in fatty acid oxidation, fatty acid production, fatty acid chemical modification and other directions, can solve the problems of many by-products, poor process stability, short reaction time, etc., and achieves good reaction stability and ring-opening. The effect of less decomposition and reduced reaction time

Inactive Publication Date: 2018-08-14
JIAXING UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems of high energy consumption, poor process stability, low reaction rate, long reaction time and many by-products in the production process of epoxy soybean oil in the prior art, and provides a process with simple process steps and high operability. Strong, good process stability, low energy consumption, high reaction rate, short reaction time, high-efficiency preparation process of epoxy soybean oil with less product by-products

Method used

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  • A kind of high-efficiency preparation process of epoxidized soybean oil
  • A kind of high-efficiency preparation process of epoxidized soybean oil
  • A kind of high-efficiency preparation process of epoxidized soybean oil

Examples

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Effect test

Embodiment 1

[0029] (1) Preparation of high-concentration peracetic acid: add concentrated sulfuric acid to glacial acetic acid, stir evenly, add hydrogen peroxide solution with a concentration of 30% by mass, stir evenly, and let stand at room temperature for 24 hours to obtain high-concentration peroxygen Acetic acid mixed solution, wherein the mass ratio of glacial acetic acid, concentrated sulfuric acid and hydrogen peroxide solution is 100:10:25;

[0030] (2) Epoxidation reaction: add the high-concentration peracetic acid solution and soybean oil in step (1) into the external circulation oxidation reaction kettle in turn, and the mass ratio of the high-concentration peracetic acid solution and soybean oil is 1.5:1, Heating to 60 ºC, holding the reaction for 1.5 hours, to obtain crude epoxidized soybean oil, and continuously shearing and emulsification during the holding period;

[0031] (3) Purification and purification: the epoxidized soybean oil in step (2) is subjected to water elu...

Embodiment 2

[0034] (1) Preparation of high-concentration peracetic acid: add concentrated sulfuric acid to formic acid, stir evenly, add hydrogen peroxide solution with a concentration of 40% by mass, stir evenly, and let stand at room temperature for 30 hours to obtain high-concentration peracetic acid Mixed solution, wherein the mass ratio of formic acid, concentrated sulfuric acid and hydrogen peroxide solution is 90:10:30;

[0035] (2) Epoxidation reaction: add the high-concentration peracetic acid solution and soybean oil in step (1) into the external circulation oxidation reaction kettle in turn, and the mass ratio of the high-concentration peracetic acid solution and soybean oil is 1.8:1, Heating to 65 ºC, holding the reaction for 1 hour to obtain crude epoxidized soybean oil, and continuing to shear and emulsify during the holding period;

[0036] (3) Purification and purification: the epoxidized soybean oil in step (2) is subjected to water elution of acid, and after the pH value...

Embodiment 3

[0039] (1) Preparation of high-concentration peracetic acid: add concentrated sulfuric acid to glacial acetic acid, stir evenly, add hydrogen peroxide solution with a concentration of 60% by mass, stir evenly, and let stand at room temperature for 72 hours to obtain high-concentration peroxygen Acetic acid mixed solution, wherein the mass ratio of glacial acetic acid or formic acid, concentrated sulfuric acid and hydrogen peroxide solution is 80:10:50;

[0040] (2) Epoxidation reaction: add the high-concentration peracetic acid solution and soybean oil in step (1) into the external circulation oxidation reaction kettle in turn, and the mass ratio of the high-concentration peracetic acid solution and soybean oil is 2:1, Heating to 75 ºC, holding the reaction for 0.5 hours, to obtain crude epoxidized soybean oil, and continuously shearing and emulsification during the holding period;

[0041] (3) Purification and purification: the epoxidized soybean oil in step (2) is subjected ...

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Abstract

The invention discloses a high-efficiency preparation process of epoxidized soybean oil. According to the high-efficiency preparation process, a prepared high-concentration peroxyacetic acid and soybean oil are taken as the raw materials to directly have an epoxidation reaction in an external-circulation epoxidation reaction kettle; a high-concentration peroxycarboxylic acid is capable of increasing the reaction promotion power so that the epoxidation reaction rate can be greatly increased; besides, due to the use of the external-circulation epoxidation reaction kettle, the heat exchange of the materials during the reaction is thorough, the reaction stability is good, and the grease (soybean oil) can be dispersed into micro-droplets to form a large interphase mass transfer area; the high-concentration peroxycarboxylic acid is mixed with the raw material grease micro-droplets directly and strong, and therefore, the contact area is increased, the reaction rate is greatly increased and the epoxidation time is shortened (0.5-1.5h). According to the high-efficiency preparation process of the epoxidized soybean oil, the process and the reaction kettle are optimized, and due to the synergistic effect of the process and the reaction kettle, the reaction rate is greatly increased, the epoxidation reaction time is reduced and the energy consumption is reduced; besides, the product is low in ring-opening decomposition, few in byproducts and low in impurity content, and the technical indexes of the product such as the epoxy value meet the related national standard requirements.

Description

technical field [0001] The invention relates to a preparation method of an epoxy plasticizer, in particular to an efficient preparation process of epoxidized soybean oil. Background technique [0002] Phthalates (DOP) plasticizers have long dominated the processing of plastic products. However, the plasticizer contains aromatic rings and is not easy to biodegrade. During the process of food processing, heating, packaging, and packaging, DOP may be dissolved from plastic products and penetrate into food, causing harm to health. In 2011, more Some media disclosed that DOP plasticizer (called plasticizer by Taiwan media) is detrimental to the reproductive system development of boys; DOP raw materials are derived from petroleum refining products, and petroleum is a non-renewable resource. Based on the above problems, the scope of application of phthalate (DOP) plasticizers is greatly limited. [0003] The annual output and consumption of phthalate plasticizers in my country ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/00
CPCC11C3/00C11C3/006
Inventor 胡万鹏孙萍王云飞郁亚娟
Owner JIAXING UNIV
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