碳酸二甲酯与碳酸二乙酯酯交换合成碳酸甲乙酯的研究  

Study on the Synthesis of Methyl Ethyl Carbonate by Transesterification of Diethyl Carbonate with Dimethyl Carbonate

作　　者：柳娜[1] 薛冰[1] 

机构地区：[1]常州大学石油化工学院,江苏常州213164

出　　处：《化学世界》2011年第3期172-174,154,共4页Chemical World

基　　金：江苏省高技术研究项目(BG2006015)

摘　　要：以Al2O3/Si O2为催化剂考察了碳酸二甲酯和碳酸二乙酯在液相条件下酯交换合成碳酸甲乙酯的过程。研究了活性组分负载量、催化剂用量、反应温度、反应时间等条件对酯交换反应的影响,并通过NH3-TPD和N2吸附脱附等手段对催化剂进行了表征。结果表明:以Si O2为载体,Al2O3负载量为12%的催化剂对碳酸二甲酯与碳酸二乙酯液相酯交换合成碳酸甲乙酯反应具有较好的催化性能,催化剂的用量为反应物质量的7%,常压下反应温度120℃,反应时间8 h,碳酸二甲酯和碳酸二乙酯的摩尔比为1∶1时,碳酸甲乙酯的收率可以达到63.64%。此外还考察了催化剂的重复使用性能,结果显示该催化剂对于碳酸二甲酯和碳酸二乙酯酯交换合成碳酸甲乙酯的反应有很好的稳定性。Synthesis of methyl ethyl carbonate（MEC） by transesterification of diethyl carbonate（DMC） with dimethyl carbonate（DEC） was carried out over Al_2O_3/SiO_2 catalysts.Effects of the active component loading amount,catalyst dosage,reaction temperature and time on the transesterification reaction were investigated in detail.The catalysts were characterized by means of NH_3-TPD and N_2 adsorption/desorption techniques.Results indicated that the 12% Al_2O_3/SiO_2 catalyst exhibited the best activity for the transesterification of DMC with DEC.Under the optimial conditions： catalyst dosage 7%,temperature 120 ℃, reaction time 8 h,molar ratio of DMC to DEC 1∶1,the highest yield of MEC,about 63.64%,was obtained.Furthermore,the reusability of the catalyst was also investigated.The catalyst exhibited a good stability for transesterification of DMC with DEC under the reaction conditions.

关 键 词：碳酸二甲酯 碳酸二乙酯 碳酸甲乙酯 酯交换 Al2O3/SiO2 

分 类 号：TQ413.23[化学工程]