催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (5): 421-426.

• 研究论文 • 上一篇    下一篇

高Cu含量MCM-41在苯直接羟基化反应中的催化性能

蒋斯扬1,孔岩1,吴丞1,徐铮2,朱海洋2,王春燕2,王军1,颜其洁2   

  1. 1 南京工业大学化学化工学院, 省部共建材料化学工程教育部重点实验室, 江苏南京 210009; 2 南京大学化学化工学院, 江苏南京 210093
  • 收稿日期:2006-05-25 出版日期:2006-05-25 发布日期:2006-05-25

Catalytic Performance of Cu-MCM-41 with High Copper Content for the Direct Hydroxylation of Benzene to Phenol

JIANG Siyang1, KONG Yan1*, WU Cheng1, XU Zheng2, ZHU Haiyang2, WANG Chunyan2, WANG Jun1*, YAN Qijie2   

  1. 1 Key Laboratory of Material-Oriented Chemical Engineering of Jiangsu Province and MOE, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, Jiangsu, China; 2 Department of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu, China
  • Received:2006-05-25 Online:2006-05-25 Published:2006-05-25

PDF

959

被引次数

67

摘要： 考察了高铜含量(最高达26.0%)且铜原子主要处于中孔骨架的Cu-MCM-41在苯/过氧化氢直接羟基化制备苯酚反应中的催化性能,研究了铜含量、催化剂用量、溶剂种类、反应物摩尔比、温度以及时间等对催化剂活性的影响. 结果表明,该催化剂在苯直接羟基化反应中具有良好的催化活性,在最佳反应条件下,可使苯转化率达52.9%, 苯酚选择性达58.9%, 苯酚收率达31.2%, 优于文献报道的低铜含量中孔分子筛的催化结果. 另外,从反应机理对影响反应的因素进行了初步探讨.

关键词: Cu-MCM-41分子筛, 苯, 过氧化氢, 羟基化, 苯酚

Abstract: Cu-MCM-41 catalysts in which the copper content could be up to 26.0% and most of the copper atoms were incorporated into the silica framework were prepared. They exhibited high catalytic activity for direct hydroxylation of benzene with H2O2. Under the optimal reaction conditions, a 52.9% conversion of benzene and 31.2% yield of phenol were obtained, which was higher than the catalysts reported in the literature using other mesoporous materials with low copper content. The influence of various reaction parameters such as the copper content, the molar ratio of H2O2/benzene, the amount of catalyst, solvents, and the reaction temperature on the catalytic activity was studied and discussed in accordance with the reaction mechanism.

Key words: Cu-MCM-41 molecular sieve, benzene, hydrogen peroxide, hydroxylation, phenol