离子液体催化酯交换合成碳酸甲乙酯  

Preparation of ethyl methyl carbonate via transesterification catalyzed by ionic liquid

作　　者：孙伟民[1] 

机构地区：[1]辽宁石化职业技术学院,锦州121001

出　　处：《化工新型材料》2015年第8期207-209,共3页New Chemical Materials

基　　金：辽宁省教育厅辽教发[(2014)191号]精细化工以模拟教学产品为纽带校内实训基地

摘　　要：设计合成了一种碱性功能化离子液体[OHBMIM]PhCOO,在其作为催化剂时,考察了其对碳酸二甲酯(DMC)和碳酸二乙酯(DEC)交换制备碳酸甲乙酯(EMC)的催化性能。研究表明,当离子液体用量为5%,反应温度为85℃,反应时间为6h,反应物配比n(DMC)∶n(DEC)=1时,EMC收率可达52.6%。并且,离子液体[OHBMIM]PhCOO重复使用6次后,EMC收率没有明显降低。alkaline ionic liquid [OHBMIM]PhCOO was designed and synthesized. The synthesis of ethyl methyl car- bonate by transesterification of dimethyl carbonate and diethyl carbonate in the presence of alkaline ionic liquids [OHB- MIM]PhCOO as catalysts was studied. Results showed that when concentration of ionic liquid 5%, reaction temperature 85℃ , reaction time 6h, n（DMC） ： n（DEC） = 1, the yield of EMC 52.6% could be obtained. The ionic liquid could be recycled 6 times with only a slight decrease in activity.

关 键 词：离子液体 碳酸二甲酯 碳酸二乙酯 酯交换 碳酸甲乙酯 

分 类 号：TQ225.52[化学工程—有机化工]