金催化剂在丙烯气相直接环氧化反应中的应用  

Application of Gold Supported Catalysts in Gas-Phase Direct Epoxidation of Propylene

作　　者：原宇航[1] 吴魏[1] 周兴贵[1] 袁渭康[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《化学反应工程与工艺》2005年第4期353-359,共7页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金(20276018)

摘　　要：环氧丙烷(PO)是一种重要的有机化工原料。近来发现采用沉积-沉淀法将金高度分散在一些含钛物质表面上时,能够催化 H_2-O_2-丙烯气相体系直接合成 PO。金粒大小和分散状态,载体及助剂等因素对催化剂性能有重要影响。主要就催化剂性能的影响因素,反应及失活机理等方面的研究进展情况进行了总结和评述,以利于将来深入地研究。Propylene oxide was an important chemical feedstock. It had been found that gold that highly dispersed over a series of Ti-containing supports by the deposition-precipitation method could catalyze vapor phase propylene epoxidation in H2-O2 mixture. Size and shape of gold particles, the selection of suitable supports and additives had decisive influences on the performance of catalysts. Research progress on catalyst preparation and mechanism of epoxidation and deactivation were reviewed and discussed.

关 键 词：环氧丙烷 金催化剂 环氧化 沉积-沉淀 

分 类 号：O643.322[理学—物理化学] O623.425[理学—化学]