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）.
出处
《化工学报》
EI
CAS
CSCD
北大核心
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)
关键词
磷钨酸
瓶中造船
氨肟化
phosphotungstic acid
ship in the bottle
ammoximation
