稀土固体超强酸SO_(4)^(2-)-La^(3+)/TiO_2催化合成丁醛乙二醇缩醛  

Synthesis of Butyraldehyde Glycol Acetal with SO_(4)^(2-)-La~ (3+ ) /TiO_2 as Catalyst

作　　者：李德江[1] 付和青[2] 

机构地区：[1]郧阳师范专科学校化学系,湖北省丹江口市442700 [2]华南理工大学化工学院化工研究所,广州510640

出　　处：《香料香精化妆品》2004年第6期11-13,共3页Flavour Fragrance Cosmetics

基　　金：湖北省教育厅2003年重点科研项目(项目编号:2003A001)

摘　　要：　以稀土固体超强酸SO2- La3+/TiO 为催化剂,丁醛和乙二醇为原料合成丁醛乙二醇缩醛,探讨了 SO2- -La3+/TiO2催化剂对缩醛反应的催化活性,较系统地研究了原料比、催化剂的用量、催化剂的焙烧温度以及反应时间对产品收率的影响。实验表明:在焙烧温度为500℃时,制得的催化剂活性最高;在n(乙二醇)/n(丁醛)=1.8,催化剂的用量为反应物料总质量的1.5%,环己烷为带水剂,反应时间2.0h的优化条件下丁醛乙二醇缩醛的收率可达到89.5%。A new environmental friendly catalyst, rare earth solid super acid SO 2- 4 LA 3+ /TiO 2 (Ⅰ)was prepared. Butyraldehyde glycol acetal(Ⅱ)was synthesized from butyraldehyde(Ⅲ) and glycol(Ⅳ)with(Ⅰ)as catalyst. The factors influencing on the yield of the product, such as calcinated temperature, the amount of catalyst used, reaction time and molar ratio of glycol to butyraldehyde, were investigated. Experimental result showed that when calcinated at 500℃,I is an excellent catalyst. With n(Ⅳ)/(Ⅲ)=1.8, ω(Ⅰ)=1.5%, cyclohexane as water-carrying agent, and the reaction time 2.0 h, the yield of butyraldehyde glycol acetal can reach to 89.5%.

关 键 词：稀土固体超强酸 丁醛乙二醇缩醛 催化剂 催化合成 反应时间 缩醛反应 带水剂 SO4^2- LA^3+ TiO2 

分 类 号：TQ655[化学工程—精细化工]