高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (7): 1101.

• 论文 • 上一篇    下一篇

Cr-HMS合成、表征及其在催化氧化反应中的应用

乐洪咏, 华伟明, 唐颐, 乐英红, 高滋   

  1. 复旦大学化学系, 上海 200433
  • 收稿日期:1999-08-02 出版日期:2000-07-24 发布日期:2000-07-24
  • 通讯作者: 高滋(1933年出生),女,教授,博士生导师,从事多相催化研究.E-mail:zigao@fudan.edu.cn E-mail:zigao@fudan.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:29873011)资助

Synthesis, Characterization of Cr-HMS and the Application in Catalytic Oxidation

YUE Hong-Yong, HUA Wei-Ming, TANG Yi, YUE Ying-Hong, GAO Zi   

  1. Department of Chemistry, Fudan University, Shanghai 200433, China
  • Received:1999-08-02 Online:2000-07-24 Published:2000-07-24

PDF (PC)

被引次数

19

摘要： 合成了一系列不同Cr含量的CrHMS介孔分子筛,并对其物化性质进行了表征.结果表明,Cr的引入降低了介孔分子筛骨架结构的规整度和孔径的均一程度.CrHMS对苯羟基化和环己烷氧化反应均表现出良好的催化活性,并且随Cr含量的增加,催化活性呈火山型分布.对于较易进行的环己烷氧化反应,将CrHMS在H2气氛中预先还原处理,可使催化剂既能保持较高的催化氧化活性,又能获得较好的稳定性.

关键词: Cr-HMS, 合成, 表征, 苯羟基化, 环己烷氧化

Abstract: Aseries of chromium containing mesoporous molecular sieves Cr-HMSwith various chromium content were synthesized and characterized. It was found that the incorporation of chromium into HMSleads to the decrease of their structural order as well as the uniformity of their mesopores. The catalysts exhibit good activities for both the oxidation of cyclohexane and the hydroxylation of benzene. The conversions of benzene and cyclohexane versus the chromium content in the catalysts show typical volcano shapes. In the case of the oxidation of cyclohexane which is easier to be oxidized, pretreating Cr-HMSby reduction in H2 can not only retain its relatively high activity, but also acquire a relatively high stability.

Key words: Cr-HMS, Synthesis, Characterization, Hydroxylation of benzene, Oxidation of cyclohexane

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