Heterogenization of Heteropolyacids: A General Discussion on the Preparation of Supported Acid Catalysts

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• 作者：Yue Wu ; Xingkai Ye ; Xiangguang Yang ; Xinping Wang ; Wenling Chu ; and Yucai Hu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：1996
• 出版时间：August 1996
• 年：1996
• 卷：35
• 期：8
• 页码：2546 - 2560
• 全文大小：834K
• 年卷期：v.35,no.8(August 1996)
• ISSN：1520-5045

文摘

Heteropolyacids (HPAs) possess both acidic and redox catalyticproperties and held extensivepromise of practical application. These type of compound display agreat potential of specificsynthesis reactions for replacing sulfuric acid to satisfy therequirements of environmentalprotection. Heterogenizing HPAs would not only make them moreuseful in liquid phaseoxidation with oxygen and in acid-catalyzed reaction, as the catalystis often difficult to separatefrom the reaction products, but also create favorable factors forrealizing heterogenization ofhomogeneous reaction and even utilizing new technology of catalyticdistillation. In this paper,different kinds of porous materials which are well characterized,including oxides such as Al₂O₃,SiO₂, TiO₂, diatomite, bentonite, and activecarbon of different sources, were used as supportfor heterogenizing HPAs (in different media), and the obtained results,the intrinsic charactersof supports which may influence both the nature of the interactionbetween HPAs and supportsin the heterogenization and the activity in the catalytic reaction, areexplored. It is expectedthat these can provide a referential model for preparing supported acidcatalyst used in liquidphase.