硅钨酸掺杂聚苯胺催化剂催化合成丁醛乙二醇缩醛  

Synthesis of Butyraldehyde Glycol Acetal with H_4SiW_(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2期121-124,共4页Fine Chemicals

基　　金：国家自然科学基金资助项目(No.29971024);湖北省教育厅重点科研基金资助项目(No.2002A00008)

摘　　要：自制了硅钨酸(H4SiW12O40)掺杂聚苯胺(PAn)催化剂H4SiW12O40/PAn。以丁醛和乙二醇为原料合成丁醛乙二醇缩醛,探讨了硅钨酸掺杂聚苯胺催化剂对缩醛反应的催化活性,较系统地研究了原料量比、催化剂用量、反应时间诸因素对产品收率的影响。实验表明:硅钨酸掺杂聚苯胺是合成丁醛乙二醇缩醛的良好催化剂,在n(乙二醇)/n(丁醛)=1 5,催化剂用量为反应物料总质量的1 2%,环己烷为带水剂,反应时间1 0h的优化条件下,丁醛乙二醇缩醛的收率可达89 7%。A new environmentally-friendly catalyst,H_4SiW_(12)O_(40)/PAn (Ⅰ) was prepared.Butyraldehyde glycol acetal (Ⅱ) was synthesized from butyraldehyde (Ⅲ) and glycol (Ⅳ) in the presence of Ⅰ.Factors influencing the product yield were discussed and best reaction conditions were found. Experimental result showed that Ⅰ is an excellent catalyst.With n(Ⅳ)/n(Ⅲ)=1.5,w(Ⅰ)=1.2% and reaction time 1.0 h,yield of Ⅱ can reach 89.7%.

关 键 词：丁醛乙二醇缩醛 硅钨酸 聚苯胺 缩醛反应 

分 类 号：TQ426.91[化学工程] TQ413.26