2-乙氧基丙烯绿色合成技术的研究

以酸性阳离子交换树脂为催化剂在无溶剂的条件下,采用丙酮和原甲酸三乙酯缩合来制备丙酮缩二乙醇,通过正交实验和单因素实验得到适宜的反应条件为:反应温度15℃、保温时间10h、催化剂用量1:80(m/m)、原料配比n(丙酮):n(原甲酸三乙酸)=1.0:1、催化剂用量m(催化剂):m(原甲酸三乙酸)=1:100。再以氯化铵为催化剂采用反应精馏技术由丙酮缩二乙醇制备了2-乙氧基丙烯,考察了回流比对2-乙氧基丙烯收率的影响,得到适宜的回流比为8。在适宜的操作条件下,2-乙氧基丙烯单程总收率达77.2%。该技术具有所需设备投资和能耗较低、流程简单且对环境友好的优点,是一种可行的绿色合成技术。

The Green Synthesis Technology of 2-Ethoxypropene

2,2-Diethoxypropane was synthesized from acetone and triethyl orthoformate via condensation with acidic cation-exchange resin.The affection to the yield of some factors such as reaction temperature,persistent time,catalyst quantity and reactant ratio were discussed.and the optimal technologic conditions are determined.2-Ethoxypropene was prepared from 2,2-diethoxypropane with reactive distillation technology.The overall yield of 2-ethoxypropene was up to 77.2%.The technology is a feasible green synthesis,friendly to the enviroment,simple operation,low equipment investment and energy consumption.