用二氧化碳合成碳酸丙烯酯的新方法研究  

A new method for synthesis of propylene carbonate from CO_2

作　　者：赵元[1] 漆新华[1] 李贺[1] 庄源益[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071

出　　处：《天津化工》2007年第6期18-19,共2页Tianjin Chemical Industry

基　　金：天津市自然科学基金项目(05YFJMJC00800)

摘　　要：研究了环氧丙烷和二氧化碳在新的催化剂季铵化壳聚糖上直接合成碳酸丙烯酯的工艺条件和影响因素。结果发现反应温度和反应时间对多相催化合成碳酸丙烯酯的收率和选择性有重要影响,而系统压力和催化剂用量对合成产物效率的影响不大。比较优化的反应温度、反应时间和压力分别为160℃、6h和4MPa。经过5次循环使用后催化剂的选择性变化不大,收率略有下降。Factors influencing the direct synthesis of propylene carbonate from CO2 and propylene oxide catalyzed by quaternized chitosan were investigated. It is found that both reaction temperature and reaction time are more important factors which control the product yields and selectivity. The optimized reaction temperature, reactiontime and pressure are 160℃, 6 hs and 4 MPa respectively. Pressure of the catalytic system and dosage of the catalyst both have little effects on the synthesis activity of catalyst.

关 键 词：环氧丙烷 二氧化碳 季氨化壳聚糖 催化 碳酸丙烯酯 

分 类 号：TQ225.52[化学工程—有机化工]