摘要
采用溶胶-凝胶法制备出具有Keggin结构的杂多酸H3PW12O40/SiO2复合催化剂,用FT-IR,XRD等手段表征了其结构形态。考察了复合催化剂催化合成糠醛乙二醇缩醛的工艺条件,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:合成糠醛乙二醇缩醛的较优反应条件为:n(醛)/n(醇)=1.0/1.2,催化剂的用量为糠醛质量的6.0%,环己烷为带水剂,反应时间4.0 h。上述条件下,产物的收率可达85.0%以上。
A new complex hetempolyacid with keggin structure, H3PW12O40/SiO2 was prepared by sol- gel method , and characterized with FT- IR and XRD techniques. By means of this catalyst, the conditions of furfural glycol acetal synthesis were studied. The results showed that the optimal conditions are as follows： furfural 0.1 mol, n （furfural） ： n （ ethylene glycol） = 1.0： 1.2, the ratio of catalyst to the mass of furfural is 6.0%, using cyclohexane as water stripping agent, the reaction time is 4.0 h. Under the above conditions, a yield of more than 85 % of furfural glycol acetal can be reached.
出处
《日用化学工业》
CAS
CSCD
北大核心
2006年第3期202-204,共3页
China Surfactant Detergent & Cosmetics
基金
江西师范大学青年成长基金资助项目(1341)
