催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (4): 385-390.

• 研究论文 • 上一篇    下一篇

助剂种类对Cu-MCM-41在苯羟基化反应中催化性能的影响

孔岩1,徐鑫杰1,吴勇2,张瑞1,王军1   

  1. 1 南京工业大学材料化学工程国家重点实验室, 江苏南京 210009; 2 南京师范大学化学与环境科学学院, 江苏南京 210097
  • 收稿日期:2008-04-25 出版日期:2008-04-25 发布日期:2012-03-22

Effect of Promoters on the Catalytic Activity of MCM-41 with High Copper Content in Benzene Hydroxylation

KONG Yan1*, XU Xinjie1, WU Yong2, ZHANG Rui1, WANG Jun1*   

  1. 1 State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, Jiangsu, China; 2 Institute of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097, Jiangsu, China
  • Received:2008-04-25 Online:2008-04-25 Published:2012-03-22

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764

被引次数

31

摘要： 研究了苯过氧化氢直接羟基化制备苯酚反应中不同种类助剂对高铜含量(最高达26.0%) MCM-41催化性能的影响. 结果表明,掺杂酸性助剂B和Al可使苯酚的选择性达到100%, 氧化还原性助剂V和Cr可适当提高苯转化率,而Zr和Ti等元素对Cu-MCM-41的催化性能有抑制作用. 根据自由基反应机理对不同助剂产生的影响进行了初步分析.

关键词: 助剂, Cu-MCM-41, 苯, 过氧化氢, 羟基化

Abstract: Cu-MCM-41 with a high copper content up to 26.0% showed excellent catalytic activity in the direct hydroxylation of benzene with hydroperoxide. The effects of various kinds of heteroatoms on the catalytic activity were studied. The introduction of a small amount of acidic promoters such as B and Al can enhance phenol selectivity to 100%. Some redox promoters such as V and Cr increase the conversion of benzene slightly, whereas other elements such as Ti and Zr inhibit the catalytic activity of catalysts. The reasons for these influences were briefly discussed according to the radical mechanism.

Key words: promoter, Cu-MCM-41, benzene, hydrogen peroxide, hydroxylation