催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (2): 333-339.DOI: 10.3724/SP.J.1088.2011.00820

• 研究论文 • 上一篇    下一篇

Ti-MWW 催化氯丙烯环氧化反应动力学行为

方向青, 王钰宁, 邓秀娟, 吴海虹, 吴鹏, 刘月明, 何鸣元   

  1. 华东师范大学化学系, 上海市绿色化学与化工过程绿色化重点实验室, 上海 200062
  • 收稿日期:2010-08-16 修回日期:2010-11-15 出版日期:2011-01-26 发布日期:2014-06-25

Reaction Dynamics Behavior of Epoxidation of Allyl Chloride with Hydrogen Peroxide Catalyzed by Ti-MWW

FANG Xiangqing,WANG Yuning, DENG Xiujuan, WU Haihong, WU Peng, LIU Yueming*, HE Mingyuan   

  1. Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, Shanghai 200062, China
  • Received:2010-08-16 Revised:2010-11-15 Online:2011-01-26 Published:2014-06-25

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868

被引次数

39

摘要： 以 Ti-MWW 分子筛为催化剂, 以 H2O2 为氧化剂, 系统研究了氯丙烯环氧化反应的动力学行为. 结果表明, 该反应速率与 Ti-MWW 分子筛的用量成正比, 是 1 级反应. 当 H2O2 浓度小于 0.67 mol/L 时, 环氧化反应为 1 级反应; 大于 2 mol/L 时, 为 0 级反应. 随着氯丙烯浓度的增加, 环氧化反应级数从 1 级向 0 级转变; 且只有当其浓度很高时, 反应级数才会明显降低. 随着分子筛中 Ti 含量的增加, 氯丙烯环氧化反应速率呈 S 形变化.

关键词: 钛硅分子筛 Ti-MWW, 氯丙烯, 过氧化氢, 环氧化反应, 反应机理, 动力学

Abstract: The reaction mechanism for epoxidation of allyl chloride (ALC) with H2O2 catalyzed by Ti-MWW was studied in detail. The results showed that the epoxidation of ALC is first order reaction with respect to the catalyst amount and is the reactions between zero and first order with respect to the substrate concentration and the oxidant concentration. For H2O2, the epoxidation is first order reaction when its concentration is lower than 0.67 mol/L and zero order when its concentration is higher than 2 mol/L. For ALC, only when its concentration is very high, the obvious decrease of the reaction order from 1 to 0 was observed. And the epoxidation reaction rate is an S-type curve when the Ti content in Ti-MWW increases.

Key words: Ti-MWW zeolite, allyl chloride, hydrogen peroxide, epoxidation, reaction mechanism, dynamics