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
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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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