磷钨酸掺杂聚苯胺催化剂催化合成苹果酯  

Synthesis of 2-Methyl-2-ethoxycarbonylmethyl-1,3-dioxolane Using H_3PW_(12)O_(40)/PAn as Catalyst

作　　者：杨水金[1] 余协卿[1] 孙聚堂[2] 

机构地区：[1]湖北师范学院化学与环境工程系,湖北黄石435002 [2]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《精细化工》2004年第5期349-351,共3页Fine Chemicals

基　　金：湖北省教育厅重点科研基金资助项目(2002A00008);国家自然科学基金资助项目(29971024)

摘　　要：自制了磷钨酸(H3PW12O40)掺杂聚苯胺(PAn)催化剂H3PW12O40/PAn。以乙酰乙酸乙酯和乙二醇为原料合成苹果酯,较系统地研究了原料摩尔比、催化剂用量、反应时间诸因素对产品收率的影响。实验表明,合成苹果酯的适宜反应条件为n(乙酰乙酸乙酯)∶n(乙二醇)=1∶1 5,催化剂用量为反应物料总质量的1 0%,环己烷为带水剂,反应时间50min。上述条件下,苹果酯的收率为81 0%。A new environmental friendly catalyst,H_3PW_(12)O_(40)/PAn(Ⅰ) was prepared.2-Methyl-2-ethoxycarbonylmethyl-1,3-dioxolane(Ⅱ) was synthesized from ethyl acetoacetate(Ⅲ) and ethylene glycol(Ⅳ) in the presence of Ⅰ.Factors influencing the product yield were discussed and the best reaction conditions were found.Experimental result showed that Ⅰ is an excellent catalyst.With n(Ⅲ)∶n(Ⅳ)=1.0∶1.5,w(Ⅰ)=1.0%,and reaction time=50 min,yield of Ⅱ can reach 81.0%.

关 键 词：苹果酯 磷钨酸 聚苯胺 

分 类 号：TQ655[化学工程—精细化工] TQ426.91