Synthesis process of epoxy resin with anionic catalyst

An epoxy resin and anion technology, which is applied in the field of epoxy resin synthesis using anion catalysts, can solve the problems of large amounts of waste water and sodium chloride, environmental pollution, economic loss, etc., and achieve the goals of reducing environmental protection costs, promoting closed-loop reactions, and reducing emissions Effect

Inactive Publication Date: 2007-03-21
蓝星安迪苏股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When using this method to synthesize epoxy resin, a large amount of alkali metal hydroxide will be used, resulting in a large amount of waste water and sodium chloride, which will bring certain environmental pollution and economic loss

Method used

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  • Synthesis process of epoxy resin with anionic catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of method that adopts anion catalyst to synthesize epoxy resin, comprises the following steps:

[0023] (1) To deal with strong base anion exchange resin, specific measures include:

[0024] a) strong base anion exchange resin (201#, 301# anion exchange resin produced by purolite (china) co.LTD) is carried out with a sodium sulfate solution with a mass concentration of 1% to 15%. Salt washing (transfer to sodium ions), and then washing to neutrality (pH value is 7) with ion-free water, wherein the quality of sodium sulfate solution is 2-5 times that of strong base anion exchange resin, for example, it can be selected as 3,4 times, b) washing step a) to neutral strong base anion exchange resin with a mass concentration of 1% to 15% sodium hydroxide aqueous solution for alkaline washing, and then washing with ion-free water to neutral (PH value is 7) , the quality of sodium hydroxide aqueous solution is 2-5 times of strong base anion exchange resin, for example ca...

Embodiment 2

[0029] 1000 g of strong base exchange resin was eluted with 2% sodium sulfate aqueous solution, and then washed with deionized water until neutral. The exchange resin washed to neutral with water is treated with potassium hydroxide aqueous solution with a mass concentration of 2%, and then washed with ion-free water until neutral, and the surface moisture in the ion exchange resin is extracted with ethanol. The treated anion exchange resin is heated and dried under vacuum cultivation at a temperature of 40°C for 12 hours, and 100 grams of diphenolic propane and 200 grams of epichlorohydrin are added to 15 grams of benzyltrimethylammonium chloride , carry out the etherification reaction at 75°C for 1 hour. 100 g of the treated anion exchange resin was added to the etherification agent generated by the above reaction, and the ring closure reaction was carried out at 35° C., and the reaction time was 1 hour. After the reaction, the reactant is filtered, and the filtered liquid i...

Embodiment 3

[0031] 1000 grams of strong base exchange resin was eluted with sodium sulfate with a mass concentration of 15%, and the quality of the sodium sulfate solution was 2000 grams, and then washed with deionized water until neutral. The exchange resin washed with water until neutral was treated with an aqueous sodium hydroxide solution with a mass concentration of 15%, and the mass of the aqueous sodium hydroxide solution was 2500 grams, and then washed with ion-free water until neutral. The surface moisture in the ion exchange resin is extracted with ethanol, and the quality of ethanol is 3000 grams. The treated anion exchange resin is heated and dried in vacuum, the vacuum is -0.085Mpa, the temperature is 75°C, and the time is 24 hours, 500 grams of diphenolic propane and 1500 grams of epichlorohydrin are added to 2.75 grams of four Methyl ammonium bromide, carry out etherification reaction at 125°C for 8 hours. 500 g of the treated anion exchange resin was added to the etherifi...

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Abstract

The synthesis process of epoxy resin with anionic catalyst includes the following steps: the etherification of diphenol propane and epoxy chloropropane in the presence of quaternary ammonium salt at 75-125 deg.c for 1-8 hr to produce etherate; the ring closing reaction of treated alkaline anionic exchange resin and the etherate at 35-65 deg.c for 1-6; filtering the resultant to obtain filtrate and vacuum distilling the filtrate to obtain the epoxy resin product. The synthesis process has no waste water and sodium chloride and is environment friendly, and the multiple times of catalysis with alkaline anionic exchange resin promote the ring closing reaction and results in raised epoxy resin yield.

Description

technical field [0001] The invention relates to a method for preparing a resin, in particular to a method for synthesizing an epoxy resin with an anion catalyst. Background technique [0002] Usually, the preparation method of epoxy resin is to undergo a ring-opening reaction between diphenolic propane and an equivalent or slightly excessive amount of epichlorohydrin under the action of a catalyst, and then perform a ring-closing reaction with an alkali metal hydroxide, and then extract and wash with water. , Desolvation, epoxy resin can be obtained. When adopting this method to synthesize epoxy resin, a large amount of alkali metal hydroxides will be used, a large amount of waste water and sodium chloride will be produced, and certain environmental pollution and economic loss will be brought. Contents of the invention [0003] The purpose of this invention is to provide a kind of method that adopts anion catalyst to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/68
Inventor 徐卫良金戈翁建平
Owner 蓝星安迪苏股份有限公司
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