H3PW12O(40)/TiO2催化合成肉桂醛乙二醇缩醛  

Synthesis of Cinamaldehyde glycol acetal catalyzed by H_3PW_(12)O_(40)/TiO_2

作　　者：涂媛鸿[1] 许招会[2] 熊斌[1] 廖维林[1] 

机构地区：[1]江西师范大学精细化工重点实验室,南昌330027 [2]江西师范大学化学化工学院,南昌330027

出　　处：《食品科技》2008年第4期127-129,共3页Food Science and Technology

基　　金：江西师范大学青年成长基金项目(1341)

摘　　要：用溶胶-凝胶法合成出具有Keggin结构的杂多酸H3PW12O40/TiO2复合催化材料,用FT-IR等方法研究了其结构形态,并考察了复合催化剂催化合成肉桂醛乙二醇缩醛的应用研究,其中重点考察了反应物配比、催化剂用量、反应时间及催化剂的重复使用性能等对产品收率的影响。结果表明,合成肉桂醛乙二醇缩醛的较优反应条件为肉桂醛0.1 mol、n(肉桂醛)/n(乙二醇)=1.0/1.5(mol/mol)、催化剂的用量为反应物总质量的2.0%、带水剂环己烷12 mL、回流反应3 h,肉桂醛乙二醇缩醛的产率可达83.0%以上。A new complex heteropoly acid with keggin structure, H3PW12O40/TiO2 was prepared by sol-gol method, and were characterized with FT-IR technique. By means of this catalytic materials, the catalytic conditions of Cinamaldehyde glycol acetal synthesis have been studied. The results shows that the better catalytic conditions are as follows： Cinamaldehyde 0.1 mol, n（Cinamaldehyde）/n（ethylene glycol）=1.0/1.5（mol/ mol）, the quantity of catalyst is 2.0% of the feed stock, the quantity of cyclohexane is 12 mL, the reaction time is 3 h. Experimental results showed that under the above reaction conditions the yield of Cinamaldehyde glycol acetal can reach over 83.0%.

关 键 词：溶胶-凝胶法 磷钨酸 杂多酸H3PW12O40/TiO2 肉桂醛乙二醇缩醛 

分 类 号：TS657[轻工技术与工程] TS201.2