V-MCM-41催化环己烯环氧化性能  

Catalytic oxidation of cyclohexene with H_2O_2 on V-MCM-41

作　　者：杨秀洲[1] 徐成华[1] 刘建英[1] 钟燕[1] 郑良科[1] 叶芝祥[1] 

机构地区：[1]成都信息工程学院资源环境学院,四川成都610225

出　　处：《化工学报》2009年第9期2203-2209,共7页CIESC Journal

基　　金：四川省教育厅青年基金项目(2006C032);成都信息工程学院发展基金项目(KYTZ20060902)~~

摘　　要：采用水热法合成了V-MCM-41,并用ICP-AES、FTIR、DRS-UV-Vis、XRD、BET等技术对其进行了表征,发现只有部分V进入分子筛,所合成的V-MCM-41具有较高的结晶度,并且其结晶度随晶化液中V/Si摩尔比的增大而升高。V-MCM-41催化环己烯/H2O2氧化反应结果表明,当V-MCM-41中V含量大于1.10%(摩尔分数)时,骨架V-O-V物种在催化环己烯氧化反应的同时,也可加速H2O2的分解;乙腈是该反应体系的最佳溶剂,最佳反应温度为70℃。最佳反应结果表明,环己烯的单程转化率和H2O2有效利用率可分别达到23.91%和95.4%。V-MCM-41 mesoporous materials were synthesized by the hydrothermal method,and characterized by powder X-ray diffraction,ICP-AES,FTIR,diffuse reflectance UV-Vis and N2 adsorption-desorption.The results showed that a part of vanadium ions were incorporated into the MCM-41 framework and all synthesized samples exhibited a high crystallinity that increased with increasing molar ratio of V/Si in the synthesis gels.The results of cyclohexene oxidation catalyzed by V-MCM-41 indicated that its catalytic activity decreased in cyclohexene selective oxidation when the V content was larger than 1.10% due to the presence of V-O-V species. And at the same time, acetonitrile was also found to be the best solvent for the V-MCM-41 catalyzed cyclohexene oxidation with H2O2, and the optimum reaction temperature was 70℃. The reaction results showed that cyclohexene conversion and H2O2 utilization could reach 23.91% （mol） and 95.4% （mol） under the optimum reaction conditions, respectively.

关 键 词：V-MCM-41 水热合成 环己烯 催化选择性氧化 

分 类 号：O643.3[理学—物理化学]