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Method for preparing epoxy soybean oil by utilizing high-concentration oxydol reaction heat

A technology of epoxidized soybean oil and hydrogen peroxide, which is applied in the chemical industry, can solve the problems affecting the development of epoxidized soybean oil, low product yield, and slow reaction speed, and achieve the effects of eliminating potential safety hazards, short reaction time, and reducing carbon consumption

Inactive Publication Date: 2014-10-08
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional epoxidized soybean oil process reaction uses 35~50% concentration of hydrogen peroxide. The biggest disadvantage of this low concentration of hydrogen peroxide is that the reaction speed is slow, the amount of wastewater produced is large and the unit yield of the product is low. This has always been our country The technical problems in the plasticizer industry have become a technical bottleneck problem that has long affected the development of the epoxy soybean oil industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 60 g of soybean oil with an iodine value of 127.7 g / 100 g and 3.6 g of formic acid with a mass fraction of 88% into a three-necked flask equipped with a thermometer, a stirrer and a dropping funnel. Stir slowly at 400r / min. After mixing evenly, stir vigorously at 600r / min, and slowly add 10.8 g of hydrogen peroxide with a concentration of 70% dropwise, and the dripping is completed within 15 minutes. The three-neck flask is wrapped with insulation material for heat accumulation. When the temperature reaches 60°C, remove the insulation material and immerse it in a cold water bath. The immersion area depends on the temperature, and the temperature is controlled at 65~70°C. After 1 hour of reaction, 7.2 g of hydrogen peroxide was slowly added dropwise, and the reaction was continued for 2 hours. After the reaction, the mixture was transferred to a separatory funnel, kept at 60°C and allowed to stand for 40 minutes to separate layers; the oil phase was washed with hot w...

Embodiment 2

[0016] Add 60 g of soybean oil with an iodine value of 127.7 g / 100 g and 3.6 g of formic acid with a mass fraction of 88% into a three-necked flask equipped with a thermometer, a stirrer and a dropping funnel. Stir slowly at 400r / min, stir vigorously at 600r / min after mixing evenly, slowly add 12.6 g of hydrogen peroxide with a concentration of 60%, and drop it within 15 minutes. The three-neck flask is wrapped with insulation material for heat accumulation. When the temperature reaches 60°C, remove the insulation material and immerse it in a cold water bath. The immersion area depends on the temperature, and the temperature is controlled below 70°C. After reacting for 1 hour, 8.4 g of hydrogen peroxide was slowly added dropwise, and the reaction was continued for 2 hours. After the reaction, move the mixed solution to a separatory funnel, keep it warm and let it stand for stratification; wash the oil phase with hot water until the pH value is nearly neutral. The oil phase wa...

Embodiment 3

[0019] Add 60 g of soybean oil with an iodine value of 127.7 g / 100 g and 4.0 g of formic acid with a mass fraction of 88% into a three-necked flask equipped with a thermometer, a stirrer and a dropping funnel. Stir slowly, and stir vigorously after mixing evenly, slowly add 10.8 g of hydrogen peroxide with a concentration of 70% dropwise, and drop it within 15 minutes. The three-neck flask is wrapped with insulation material for heat accumulation. When the temperature reaches 60°C, remove the insulation material and immerse it in a cold water bath. The immersion area depends on the temperature, and the temperature is controlled below 70°C. After 1 hour of reaction, 7.2 g of hydrogen peroxide was slowly added dropwise, and the reaction was continued for 2 hours. After the reaction, move the mixed solution to a separatory funnel, keep it warm and let it stand for stratification; wash the oil phase with hot water until the pH value is nearly neutral. The oil phase was distilled ...

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Abstract

The invention relates to a method for preparing epoxy soybean oil by utilizing high-concentration oxydol reaction heat, belonging to the technical field of chemical engineering. The epoxy soybean oil is prepared by utilizing 60-70% high-concentration oxydol as an oxygen source and formic acid as a catalyst under the condition of not heating. The epoxide number of the final product can reach more than 6.15%, the iodine value is lower than 2.2g / 100g, and the chroma (Pt-Co) is lower than 150. The current traditional liquid-phase epoxidation using 35-50% low-concentration oxydol as the oxygen source has the maximum defects of low reaction speed, high amount of generated wastewater and need for heating for reaction. The high-concentration oxydol can shorten the reaction and enhance the reaction rate to obtain better epoxide number, iodine value and decolorization effect; the optimized technique can implement epoxidation reaction under the condition of not heating, thereby greatly lowering the energy consumption and being more environment-friendly and low-carbon; and the method can be widely used in a vegetable fat epoxidation process, and has favorable application prospects.

Description

technical field [0001] The invention discloses a method for preparing epoxidized soybean oil by utilizing the reaction heat of high-concentration hydrogen peroxide, which belongs to the technical field of chemical industry. The invention is applicable to the deep processing and development of various unsaturated fatty acid esters, and in particular relates to a method for preparing epoxy soybean oil plasticizer by epoxidation of soybean oil. Background technique [0002] Phthalate plasticizers are the most widely used plasticizers. However, due to the potential harm to human health, with the increasing awareness of environmental protection and safety, countries have successively introduced laws to restrict such plasticizers. Use of the Product. Epoxy vegetable oil plasticizer (such as epoxy soybean oil, epoxy fatty acid methyl ester) is a new type of environmentally friendly plasticizer, its toxicity is extremely small, and it is allowed to be used as an additive for food a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/42C07D301/12
CPCC07D303/42C07D301/12
Inventor 蒋平平郑佳伟王富才陈旭清
Owner JIANGNAN UNIV
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