华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (11): 63-65,80.

• 化学化工 • 上一篇    下一篇

PDA 加氢合成CHDA 的工艺

刘庆林1 苏承炎1  贾立山1 方维平2 李清彪1   

  1. 1.厦门大学 化学工程与生物工程系,福建 厦门 3610015; 2. 厦门大学 化学系,福建 厦门 361005
  • 收稿日期:2007-01-23 出版日期:2007-11-25 发布日期:2007-11-25
  • 通信作者: 刘庆林(1965-) ,男,教授,博士生导师,主要从事多相反应动力学研究. E-mail:qlliu@xmu.edu.cn
  • 作者简介:刘庆林(1965-) ,男,教授,博士生导师,主要从事多相反应动力学研究.
  • 基金资助:

    国家"973" 计划项目(2004CB217805)

Catalytic Hydrogenation of PDA to Prepare CHDA

Liu Qing-linSu Cheng-yanJia Li-shanFang Wei-pinLi Qing-biao1   

  1. 1. Dept. of Chemical and Biochemical Engineering,Xiamen Univ. , Xiamen 361005 , Fujian, China;2. Dept. of Chemistry,Xiamen Univ. , Xiamen 361005 , Fujian,China
  • Received:2007-01-23 Online:2007-11-25 Published:2007-11-25
  • Contact: 刘庆林(1965-) ,男,教授,博士生导师,主要从事多相反应动力学研究. E-mail:qlliu@xmu.edu.cn
  • About author:刘庆林(1965-) ,男,教授,博士生导师,主要从事多相反应动力学研究.
  • Supported by:

    国家"973" 计划项目(2004CB217805)

摘要: 1 ,4-环己二胺存在反式和顺式两种异构体.文中研究了对苯二胺在Ru/C 催化下加氢合成trans-l , 4-环己二胺的工艺体系,考察了反应压力、温度、催化剂用量以及催化剂制备方法对加氢体系的影响,并初步考察了催化剂的循环套用情况.结果表明,高温活化和碱处理可以大大提高催化性能,使产品中trans-l , 4-环己二胺的含量明显增加.最佳工艺条件为:采用经500℃活化和碱处理的5% Ru/C ,加氢反应温度为140℃ ,压力为8 MPa; 此条件下对苯二胺的转化率接近100%,1,4-环己二胺的选择性达90% 以上,反顺比接近80:20.

关键词: 对苯二胺, 1 , 4-环己二胺, 催化加氢

Abstract:

1 ,4-diaminocyclohexane (CHDA) has trans-and cis-ismoers. 在lis paper deals with the process of catalytic hydrogenation of 1 ,4-phenylenediamine (PDA) to prepare trans-CHDA in the presence of catalyst Ru/C , analyzes the influences of reaction temperature and pressure , as well as the catalyst prepar硝on and dosagr on the hydrogenation , and preliminarily explores the reuse of the catalyst. The results show that the activation at a high temperature and the ba阳modificatÎon of the catalyst can greatly enhance the catalytic property and ohviously improve the yield of trans-CHDA. In the optimal conditions , that is , a catalyst-activated temperature of 500℃,a hase modification of 5 % Ru/C, a reaction temperature of 140 ℃ and a pressure of 8 MPa, the conversion rate of PDA approaches 100% , the yield of CHDA reaches over 90% and the trans-to-cis rate of CHDA approximates 80: 20.

Key words: 1, 4-phenylenediamine, 1 , 4-diaminocyclohexane, catalytic hydrogenation