SO_4^(2-)/TiO_2-WO_3催化剂催化合成苯甲醛乙二醇缩醛  

Catalytic synthesis of benzaldehyde glycol acetal with SO_4^(2-)/TiO_2-WO_3

作　　者：杨水金[1] 夏佳[1] 杨小山[1] 

机构地区：[1]湖北师范学院化学与环境工程系,湖北黄石435002

出　　处：《商丘师范学院学报》2004年第5期95-97,共3页Journal of Shangqiu Normal University

基　　金：湖北省教育厅重点科研基金(No.2002A00008)资助项目

摘　　要：报道了以固体超强酸SO2-4/TiO2-WO3为催化剂,通过苯甲醛和乙二醇反应合成了苯甲醛乙二醇缩醛,探讨了SO2-4/TiO2-WO3对缩醛反应的催化活性,较系统地研究了醛醇物质的量比,催化剂用量,反应时间诸因素对产品收率的影响.实验表明:SO2-4/TiO2-WO3是合成苯甲醛乙二醇缩醛的良好催化剂,在n(醇)∶n(醛)=1.25∶1,催化剂用量为反应物料总质量的0 50%,环己烷为带水剂,反应时间50min的优化条件下,苯甲醛乙二醇缩醛的收率可达77 3%.Benzaldehyde glycol acetal was synthesized from benzaldehyde and glycol in the presence of SO^(2-)_4/TiO_2-WO_3.The factors influencing the synthesis were discussed and the best conditions were found out.The optimum conditions are:molar ratio of glycol to benzaldehyde is 1.25:1,the quantity of catalyst is equal to 0.50% of feed stocks,the reaction temperature is 86～98℃,and the reaction time is 50 min.SO^(2-)_4/TiO_2-WO_3 is an excellent catalyst for synthesizing benzaldehyde glycol acetal and its yield can reach over 77.3%.

关 键 词：苯甲醛乙二醇缩醛 SO42-/TiO2-WO3 催化 缩醛反应 

分 类 号：TQ426.24[化学工程] TQ413.26