固载化杂多酸钴盐催化氧化甲苯制备苯甲醛  

Oxidation of Toluene to Benzaldehyde with Heteropoly Acid Cobalt Salt Immobilized on Silylated Palygorskite

作　　者：李贵贤[1] 王广[1] 毛丽萍[1] 马重华[1] 高云艳[1] 宋维维[1] 

机构地区：[1]兰州理工大学石油化工学院,兰州730050

出　　处：《硅酸盐学报》2011年第2期359-364,共6页Journal of The Chinese Ceramic Society

基　　金：甘肃省教育厅科研基金(2005GJ0281);国家自然科学基金(20961004)资助项目

摘　　要：以酸活化的凹凸棒石(palygorskite,Pa)为载体,采用化学键合的方法制备了3-氨丙基三乙氧基硅烷(3-aminopropyl-triethoxysilane,APTES)硅烷化凹凸棒石(PaAPTES)负载的Keggin型杂多酸钴盐催化剂(Co4H1PV2Mo10O40/PaAPTES),并用红外光谱分析、X射线衍射、比Brunauer–Emmett–Teller(BET)表面积测定等对催化剂进行了表征。进行了催化氧化甲苯制苯甲醛的反应实验。结果表明:在采用Co4H1PV2Mo10O40/PaAPTES进行的催化反应中,苯甲醛是主要的生成产物。当乙腈为溶剂,催化剂的用量为0.3 g,9.6 mL双氧水(H2O2在溶液中体积含量为50%),在90℃反应9 h,得到甲苯转化率为58%,苯甲醛的选择性达到75%。且催化剂便于从反应体系中分离。The catalyst（Co4H1PV2Mo10O40/PaAPTES） of heteropoly acid cobalt salt supported on acid activated and silanizing paly-gorskite（PaAPTES） by 3-aminopropyl-triethoxysilane（APTES） was prepared via chemical bonding.The properties of the catalyst was characterized by infrared spectroscopy,X-ray diffraction,Brunauer–Emmett–Teller（BET） specific area measurement.The catalytic activity of the catalyst was determined by the oxidation of toluene to benzaldehyde.The results show that benzaldehyde is the main product in the reaction.With the acetonitrile as solvent,the amount of catalyst is 0.3 g,the amount of H2O2（50% in volume） solution is 9.6 mL,after reaction at 90 ℃ for 9 h,the conversion of toluene is 58% and the selectivity of benzaldehyde is 75%.The recycling tests show that the catalyst can be easily separated from the reaction system.

关 键 词：凹凸棒石 杂多酸 甲苯 催化氧化 苯甲醛 

分 类 号：TQ426.91[化学工程]