催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (3): 246-250.

• 研究论文 • 上一篇    下一篇

Pd/Hβ双功能催化剂上苯加氢烷基化合成环己基苯

邱俊，小村贞一，窐田好浩，杉義弘   

  1. 1 吉林化工学院化学与制药工程学院, 吉林吉林 132022; 2 岐阜大学大学院工学研究科机能材料工学科, 岐阜 501-1193, 日本
  • 收稿日期:2007-03-25 出版日期:2007-03-25 发布日期:2007-03-25

Synthesis of Cyclohexylbenzene by Hydroalkylation of Benzene over Pd/Hβ Binary Catalyst

QIU Jun1*, Kenichi KOMURA2, Yoshihiro KUBOTA2, Yoshihiro SUGI2   

  1. 1 Department of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, Jilin, China; 2 Department of Materials Science and Technology, Faculty of Engineering, Gifu University, Gifu 501-1193, Japan
  • Received:2007-03-25 Online:2007-03-25 Published:2007-03-25

PDF

839

被引次数

29

摘要： 采用浸渍法制备了Pd/Hβ双功能催化剂,并用其催化苯加氢烷基化反应合成环己基苯,考察了反应温度、反应时间、氢气压力、载体的酸性和催化剂的金属担载量对反应的影响. 结果表明,在2.5 MPa H2、 200 ℃和 3 h 的条件下,苯的转化率为24.3%, 环己基苯的选择性为88.0%. 金属活性位与酸性位之间的平衡是苯加氢烷基化反应的关键. 同时,探讨了苯的加氢烷基化反应机理.

关键词: 钯, Hβ分子筛, 双功能催化剂, 苯, 加氢烷基化反应, 环己基苯

Abstract: The Pd/Hβ binary catalyst was prepared by the impregnation method and was used for the hydroalkylation of benzene to cyclohexylbenzene. The effects of reaction temperature, reaction time, hydrogen pressure, Hβ acidity, and metal loading were investigated. The results indicated that the conversion of benzene and the selectivity for cyclohexylbenzene approached 24.3% and 88.0%, respectively, under the conditions of 2.5 MPa H2, 200 ℃, and 3 h. The preferable balance between metal active sites and acidic sites in catalyst was the key to the hydroalkylation of benzene. Moreover, the mechanism of the reaction was discussed.

Key words: palladium, Hβ molecular sieve, binary catalyst, benzene, hydroalkylation, cyclohexylbenzene