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High-efficiency preparation process of epoxidized soybean oil

A technology for the preparation of epoxidized soybean oil, which is applied in the field of high-efficiency preparation of epoxidized soybean oil, can solve the problems of many by-products, poor process stability, and short reaction time, and achieve good reaction stability and less ring-opening decomposition , the effect of reducing the reaction time

Inactive Publication Date: 2015-09-30
JIAXING UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • High-efficiency preparation process of epoxidized soybean oil
  • High-efficiency preparation process of epoxidized soybean oil
  • 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 well, and let stand at room temperature for 24 hours to obtain high-concentration peroxygen Acetic acid mixture, 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 sequence, the mass ratio of high-concentration peracetic acid solution and soybean oil is 1.5:1, Heating to 60 oC, heat preservation reaction for 1.5 hours, to obtain the crude epoxy soybean oil, continuous shear emulsification during heat preservation;

[0031] (3) Purification and refining: the epoxidized soybean oil in step (2) is washed with water to remove the acid until the p...

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 well, 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 sequence, the mass ratio of high-concentration peracetic acid solution and soybean oil is 1.8:1, Heating to 65 oC, heat preservation reaction for 1 hour, to obtain the crude product of epoxy soybean oil, continuous shear emulsification during heat preservation;

[0036] (3) Purification and refinement: the epoxidized soybean oil in step (2) is washed with water to remove the acid until 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 well, and let stand at room temperature for 72 hours to obtain high-concentration peroxygen Acetic acid mixture, 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 sequence, the mass ratio of high-concentration peracetic acid solution and soybean oil is 2:1, Heating to 75 o C, heat preservation reaction for 0.5 hours, to obtain the crude epoxy soybean oil, continuous shear emulsification during heat preservation;

[0041] (3) Purification and refining: the epoxidized soybean oil in step (2) is washed with water to remove the aci...

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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 a high-efficiency preparation process of epoxy soybean oil. Background technique [0002] Phthalate (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 serving, DOP may dissolve from the plastic products and penetrate into the food, causing harm to health. In 2011, more Some media disclosed that DOP plasticizers (called plasticizers in Taiwanese media) are harmful to the development of the reproductive system of boys; DOP raw materials come from petroleum refining products, and petroleum is a non-renewable resource. Based on the above problems, the scope of use of phthalate (DOP) plasticizers is greatly limited. [0003] The annual output and consumption of phthalate plasticizers in my country account ...

Claims

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Application Information

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Patent Type & Authority Applications(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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