摘要
利用溶胶-凝胶技术以SiO2为基体包容乙酰丙酮镍Ni(acac)2·2H2O配合物,制备了分子氧环氧化环己烯的催化剂.并采用FT-IR、TG-DTA及XPS技术对凝胶催化剂进行表征.考察了不同包容条件下催化剂的催化性能.结果表明包容后得到的凝胶催化剂催化活性与均相催化剂活性相当,环己烯转化率达98.0%.循环使用3次,其活性降低1.5%.
Ni(acac)_2·2H_2O complex entrapped in SiO_2 by Sol-gel method was used to study the epoxidation of cyclohexene by molecular oxygen. The catalyst was characterized by FT-IR? TG-DTA and XPS. The effect of entrapped conditions on its catalytic epoxidation performance were investigated. It was found that the catalytic activity of the entrapped catalyst was same as that of the homogeneous one. The conversion of cyclohexene can reach up 98.0%. Furthermore, the catalyst can be reused for 3 times with only a 1.5% deduction of activity.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2004年第4期266-270,共5页
Journal of Molecular Catalysis(China)
基金
河北省自然科学基金资助项目(200008).
关键词
溶胶-凝胶技术
包容
环氧化
氧化环己烯
Sol-gel methods
Entrapment
Epoxidation
Nickel(Ⅱ)acetyacetonate
1,2-epoxycyclohexane
