H_4SiW_(12)O_(40)/TiO_2-SiO_2催化合成苯甲醛1,2-丙二醇缩醛  

Catalytic synthesis of benzaldehyde 1,2- propanediol acetal with H_4SiW_(12)O_(40)/ TiO_2- SiO_2

作　　者：吕宝兰[1] 李双[1] 彭放[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：《商丘师范学院学报》2015年第3期47-50,共4页Journal of Shangqiu Normal University

基　　金：湖北省自然科学基金(2005ABA053)资助项目

摘　　要：以H4Si W12O40/Ti O2-Si O2为催化剂,用苯甲醛和1,2-丙二醇为原料催化合成了苯甲醛1,2-丙二醇缩醛,正交实验法探讨得出的适宜反应条件为:固定苯甲醛用量0.2 mol,苯甲醛与乙二醇的物质的量之比为1.0∶1.6,催化剂用量占反应物料总质量的1.2%,反应时间45 min,带水剂环己烷的用量9 m L.在该反应条件下,苯甲醛1,2-丙二醇缩醛的收率可达88.9%.Benzaldehyde l,2- propanediol acetal was synthesized from benzaldehyde and l,2- propanediol in the presence of H4 Si W12O40/ Ti O2- Si O2 as catalyst. The optimal reaction conditions were screened by orthogonal test method. The yield of benzaldehyde l,2- propanediol acetal can reach 88. 9% under the optimum reaction conditions that benzaldehyde is 0. 2mol,molar ratio of benzaldehyde to l,2- propanediol is 1. 0∶ 1. 6,the quantity of catalyst is 1. 2%,the reaction time is 45 min and the cyclohexane as carrying- water reagent is 9m L.

关 键 词：苯甲醛1 2-丙二醇缩醛 H4SiW12O40/TiO2-SiO2 催化 

分 类 号：TQ655[化学工程—精细化工]