Method for preparing epoxy caster oil in electrochemical oxidation way

An epoxidized castor oil, electrochemical technology, applied in the direction of fatty acid chemical modification, fatty acid production, etc., can solve the problems of low epoxide yield, large environmental pollution, high equipment requirements, easy control, low production investment, Equipment simple effect

Inactive Publication Date: 2014-03-19
北京中科安途交通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] There are certain deficiencies and defects in the prior art of preparing epoxides from vegetable oils, which have higher requirements on equipment, higher energy consumption, high cost, and many by-products. It is more polluting to the environment and the yield of epoxide is not high

Method used

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  • Method for preparing epoxy caster oil in electrochemical oxidation way
  • Method for preparing epoxy caster oil in electrochemical oxidation way
  • Method for preparing epoxy caster oil in electrochemical oxidation way

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 40g of castor oil and 3ml of 0.1mol / L hydrochloric acid aqueous solution into the electrolytic cell, add 2g of formic acid into the cathode chamber and stir well. The anode uses a Pt electrode, and the cathode uses a stainless steel electrode. Put the air bubbler into the cathode chamber, connect to the power supply, and 3 / s rate oxygen. Connect the electrolytic cell to a DC stable power supply to ensure normal power supply, and adjust the current density to 0.2A / cm 2 . Set the reaction temperature to 20°C and the pH value to 6.5. After 3 hours of reaction, pour the liquid in the cathode chamber into a beaker, keep the layers static, and separate the liquid with a separatory funnel to obtain the oily epoxy castor oil. The epoxy content of epoxy castor oil is 0.145mol / 100g, and the epoxy oxidation rate is 80.3%.

Embodiment 2

[0030] Add 40g of castor oil and 6ml of 0.1mol / L hydrochloric acid aqueous solution into the electrolytic cell, add 5g of formic acid into the cathode chamber and stir well. The anode uses a titanium-based lead oxide electrode, and the cathode uses a graphite electrode. Put the air bubbler into the cathode chamber, connect to the power supply, and 3 / s rate oxygen. Connect the electrolytic cell to a DC stable power supply to ensure normal power supply, and adjust the current density to 0.5A / cm 2 . Set the reaction temperature to 40°C and the pH value to 4.5. After reacting for 5 hours, pour the cathode chamber liquid into a beaker, keep the layers static, and separate the liquid with a separatory funnel to obtain the oily epoxy castor oil. The epoxy content of epoxy castor oil is 0.168mol / 100g, and the epoxy oxidation rate is 93.3%.

Embodiment 3

[0032] Add 40g of castor oil and 4ml of 0.1mol / L hydrochloric acid aqueous solution into the electrolytic cell, add 4g of formic acid into the cathode chamber and stir well. A Pd electrode is used for the anode, and a Ni electrode is used for the cathode. Put the air bubbler into the cathode chamber, connect the power supply, and 3 / s rate oxygen. Connect the electrolytic cell to a DC stable power supply to ensure normal power supply, and adjust the current density to 0.4A / cm 2. Set the reaction temperature to 30°C and the pH value to 6.0. After 4 hours of reaction, pour the liquid in the cathode chamber into a beaker, keep the layers static, and separate the liquid with a separatory funnel to obtain the oily epoxy castor oil. The epoxy content of epoxy castor oil is 0.156mol / 100g, and the epoxy oxidation rate is 86.5%.

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PUM

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Abstract

The invention relates to a method for preparing epoxy caster oil in an electrochemical oxidation way. The method comprises the steps of adding caster oil and little hydrochloric acid aqueous solution into an electrolytic cell, introducing air and adding methanoic acid on a cathode, and epoxidating the unsaturated fatty acid in the caster oil by utilizing the H2O2 generated in the reduction reaction; epoxidating the unsaturated fatty acid on an anode by utilizing strong oxidants such as OH<-1>, O3 and O in the solution so as to obtain the oily epoxy caster oil. By adopting the method, the epoxidation rate is 80 to 93 percent; moreover, the equipment is simple, the energy consumption is low, the pollution is little, and the method is applicable to the industrial fields such as plastics, paint, rubber and the like.

Description

technical field [0001] The invention relates to a method for preparing epoxy castor oil, in particular to a method for electrolytically oxidizing castor oil into epoxy castor oil through electrochemical oxidation. Background technique [0002] The source of unsaturated fatty acids is mainly vegetable oil, which is a renewable resource. In recent years, the chemical utilization of renewable unsaturated fatty acid derivatives and vegetable oils has received extensive attention. Utilization methods of unsaturated fatty acids include esterification, transesterification, hydrogenation, epoxidation, isomerization, cracking, etc. Among them, epoxidized fatty acid is widely used as a plasticizer and stabilizer in heat-resistant, low-temperature resistant, and pharmaceutical packaging materials, and has good heat and light stabilizing effects. For example, as an additive to polyvinyl chloride, it has good compatibility, low volatility, low migration, and non-toxicity, and can be us...

Claims

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Application Information

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IPC IPC(8): C11C3/00
Inventor 李万捷田美凤杜海燕赵治军梁镇海
Owner 北京中科安途交通科技有限公司
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