Enhancement of Alkene Epoxidation Activity of Titanosilicates by Gas-Phase Ammonia Modification  

作　　者：张里艳 徐乐 孙晶晶 蒋金刚 刘月明 吴海虹 吴鹏 

机构地区：[1]Shanghai Key Laboratory of Green Chemistry and Chemical Processes,Department of Chemistry,East China Normal University,Shanghai 200062,China

出　　处：《Chinese Journal of Chemistry》2012年第9期2205-2211,共7页中国化学（英文版）

摘　　要：Novel ammonia-treated titanosilicates have been prepared by heating the samples of Ti-MWW, TS-l and Ti-Beta under pure ammonia gas flow at 673 K for a period of time. The ammonia modification improved their catalytic performance in liquid-phase oxidations. Especially, the catalytic activities of ammonified Ti-MWW, N-Ti-MWW, were enhanced greatly in the epoxidation of 1-hexene with H2O2. The reason that the ammonia treat- ment played such an important role in post-modification of titanosilicate was investigated in details. In comparison to the parent Ti-MWW catalyst, N-Ti-MMW was more robust and produced less coke in oxidation reactions.Novel ammonia-treated titanosilicates have been prepared by heating the samples of Ti-MWW, TS-l and Ti-Beta under pure ammonia gas flow at 673 K for a period of time. The ammonia modification improved their catalytic performance in liquid-phase oxidations. Especially, the catalytic activities of ammonified Ti-MWW, N-Ti-MWW, were enhanced greatly in the epoxidation of 1-hexene with H2O2. The reason that the ammonia treat- ment played such an important role in post-modification of titanosilicate was investigated in details. In comparison to the parent Ti-MWW catalyst, N-Ti-MMW was more robust and produced less coke in oxidation reactions.

关 键 词：TITANOSILICATES TI-MWW EPOXIDATION AMMONIFICATION AMMONIA 

分 类 号：TQ424.25[化学工程] TS195.513[轻工技术与工程—纺织化学与染整工程]