超稳Y沸石封装磷钨酸的制备、表征及其催化性能  

Preparation,characterization and catalytic behavior of phosphotungstic acid encapsulated in Y zeolite

作　　者：曾湘[1] 袁霞[1] 吴剑[1] 罗和安[1] 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105

出　　处：《化工学报》2010年第6期1463-1468,共6页CIESC Journal

基　　金：国家自然科学基金;中国石油化工股份有限公司联合重点项目(20736009);湖南省教育厅优秀青年项目(09B099);湖南省科技计划重点项目(2009GK2003)

摘　　要：Phosphotungstic acid encapsulated in ultra stable Y zeolite (PW-USY) was prepared by the 'ship in the bottle' synthesis.The obtained catalysts were characterized with FT-IR,ICP,UV-vis,N2-adsorption,XRD and SEM techniques.Compared with immobilized catalysts (PW/USY),it was demonstrated that encapsulation of Keggin-type 12-phosphotungstic acid in the supercage of USY zeolite was realized.In the ammoximation of cyclohexanone system with H2O2 as oxygen source,PW-USY showed better catalytic activity than PW/USY.Moreover,the catalytic performance of PW-USY did not drop apparently after using five times,and could solve the leakage problem of active component in polar reaction media better than immobilized catalysts (PW/USY).Phosphotungstic acid encapsulated in ultra stable Y zeolite （PW-USY） was prepared by the ＂ship in the bottle＂ synthesis.The obtained catalysts were characterized with FT-IR,ICP,UV-vis,N2-adsorption,XRD and SEM techniques.Compared with immobilized catalysts （PW/USY）,it was demonstrated that encapsulation of Keggin-type 12-phosphotungstic acid in the supercage of USY zeolite was realized.In the ammoximation of cyclohexanone system with H2O2 as oxygen source,PW-USY showed better catalytic activity than PW/USY.Moreover,the catalytic performance of PW-USY did not drop apparently after using five times,and could solve the leakage problem of active component in polar reaction media better than immobilized catalysts （PW/USY）.

关 键 词：磷钨酸 瓶中造船 氨肟化 

分 类 号：TQ032.4[化学工程]