H_3PW_6Mo_6O_(40)/TiO_2-WO_3催化合成苯甲醛乙二醇缩醛  

Synthesis of benzaldehyde glycol acetal using H_3PW_6Mo_6O_(40)/TiO_2-WO_3 as catalyst

作　　者：彭放[1] 王伊婷[1] 王潘[1] 余子丹[1] 杨水金[1] 

机构地区：[1]湖北师范学院化学化工学院,湖北黄石435002

出　　处：《湖北师范学院学报（自然科学版）》2014年第1期63-67,共5页Journal of Hubei Normal University(Natural Science)

基　　金：湖北高校2013年省大学生创新创业训练计划项目(201313256004)

摘　　要：采取浸渍法制备环境友好催化剂H3PW6Mo6O40/TiO2-WO3,并对催化剂进行IR和XRD表征。以H3PW6Mo6O40/TiO2-WO3为催化剂,由苯甲醛和乙二醇反应合成了苯甲醛乙二醇缩醛,探讨该催化剂对缩醛反应的催化活性,较系统地考察了醛醇物质的量比、催化剂用量、带水剂用量以及反应时间诸因素对产品收率的影响。实验表明,H3PW6Mo6O40/TiO2-WO3是合成苯甲醛乙二醇缩醛的良好催化剂,确定的适宜工艺条件为:n(苯甲醛)∶n(乙二醇)=1∶1.6,催化剂用量为反应物料总质量的0.8%,带水剂环己烷的用量为6mL,反应时间75min.在此反应条件下,苯甲醛乙二醇缩醛的收率可达79.4%.A new environmental friendly catalyst , H3PW6Mo6O40/TiO2-WO3 was prepared with the impregnation method , and characterized by FT -IR and XRD.Benzaldehyde glycol acetal was synthesized from benzaldehyde and glycol using H3PW6Mo6O40/TiO2-WO3 as the catalyst.The influence factors on the yield of benzaldehyde glycol acetal were also dis -cussed.The optimum conditions were indentified：molar ratio of benzaldehyde and glycol is 1∶1.6, mass fraction of catalyst to reactants is 0.8%, cyclohexane dosage is 6 mL and reaction time is 75 min.The yield of benzaldehyde glycol acetal can reach 79.4%under the optimum conditions.

关 键 词：苯甲醛乙二醇缩醛 H3PW6MO6O40 TiO2-WO3 催化 缩醛反应 

分 类 号：TQ655[化学工程—精细化工]