负载锌催化剂的缩合反应性能的研究  

Study on Condensation Reactivity of Supported Zinc Catalysts

作　　者：肖国民[1] 杨凤玉[1] 孔祥翔[1] 

机构地区：[1]东南大学化学化工系,南京210096

出　　处：《化学研究》2001年第4期26-28,共3页Chemical Research

基　　金：东南大学理学基金 ( 92 0 70 440 15 )

摘　　要：考察了由浸渍法制得的Zn2 + /AC ,Ni2 + /AC ,H+ /AC ,H+ +K+ /AC ,K+ /AC等催化剂存在下 ,由丙二酸二乙酯 (MDE)与原甲酸三乙酯 (OFE)在及少量乙酸或乙酸酐做缩合介质合成乙氧亚甲基丙二酸二乙酯 (EMME) .获得合成EMME较佳工艺条件 :用活性白土作为载体 ,负载 5 %Zn作为催化剂 ,催化剂用量为加入原料MDE的0 .3% (w) ,催化剂具有一定的重复使用性 ,EMME的收率可达到 98% (以MDE计 )The macerated samples Zn 2+ /AC,Ni 2+ /AC,H +/AC,H ++K +/AC,K +/AC were taken as catalysts, diethyl ethoxymethylene malonate was prepared by condensation of diethyl malonate and triethyl orthoformate in the presence of acetic anhydride and catalyst. The optional results were obtained from many experiments by changing conditions, the yield of EMME achieved 98% at 5%Zn 2+ /activated clay, catalyst/MDE=0.3%(w), catalysts had good useful life.

关 键 词：缩合反应 乙氧亚甲基丙二酸二乙酯 活性白土 负载锌催化剂 载体 丙二酸二乙酯 原甲酸三乙酯 

分 类 号：O623.624[理学—有机化学] O643.36[理学—化学]