节点文献
溶胶-凝胶包容乙酰丙酮镍的制备及其催化空气环氧化环己烯的性能
Study on the Preparation of Sol-gel Entrapped Ni（acac）2·2H2O Complex and Its Catalytic Properities on Epoxidation of Cyclohexene by Oxygen
【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%.
【Abstract】 Ni（acac）2·2H2O complex entrapped in SiO2 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.
【关键词】 溶胶-凝胶技术；
包容；
环氧化；
氧化环己烯；
【Key words】 Sol-gel methods； Entrapment； Epoxidation； Nickel(Ⅱ)acetyacetonate； 1,2-epoxycyclohexane；
【Key words】 Sol-gel methods； Entrapment； Epoxidation； Nickel(Ⅱ)acetyacetonate； 1,2-epoxycyclohexane；
【基金】 河北省自然科学基金资助项目(200008).
- 【文献出处】 分子催化 ,Journal of Molecular Catalysis , 编辑部邮箱 ,2004年04期
- 【分类号】O643.32
- 【被引频次】8
- 【下载频次】329