Preparation, Characterization and Catalytic Behavior of 12-Molybdophosphoric Acid Encapsulated in the Supercage of Cs^＋-exchanged Y Zeolite

作     者：魏瑞平 郭麦平 王军 WEI Ruiping;GUO Maiping;WANG Jun

作者机构：State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemistry and Chemical Engineer ing Nanjing University of Technology Nanjing 210009 China School of Chemistry and Chemical Engineering Southeast University Nanjing 211189 China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2009年第17卷第1期

页      面：58-63页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0703[理学-化学] 

基　　金：Supported by the National Natural Science Foundation of China (20476046) and the "Qinglan" Project of Jiangsu Province for Young Researchers 

主　　题：Y zeolite 12-molybdophosphoric acid ship in the bottle esterification 

摘      要：In order to solve the serious leaching problem of supported heteropoly acid catalysts in polar reaction media, 12-molybdophosphoric acid encapsulated in the supercage of Cs^＋-exchanged Y zeolite was prepared by the ＂ship in the bottle＂ synthesis. The influence of ion-exchange conditions and the synthesis parameters on the encaosulation of PMo12 were investigated. The obtained solid sample was characterized by X-ray diffraction （XRD）, 31p magic angle spin nuclear magnetic resonance （MAS NMR） and Fourier Transform Infrared Spectroscopy （FT-IR）, and its catalytic activity in the esterification of acetic acid and n-butanol was tested. The ion-exchange time, concentration of aqueous Cs^＋ solution, pH value, and amount of Mo added in the synthesis mixture were revealed to influence the encapsulation very remarkably. Under the optimal conditions, 12-molybdophosphoric acid could be successfully encapsulated in the supercage of CsY zeolite, and the samples showed considerable catalytic activity and excellent reusability in the esterification reaction.