中华医学超声杂志

应用化学 ›› 1995, Vol. 0 ›› Issue (1): 80-82.

• 研究论文 • 上一篇    下一篇

丙烯酰胺合成中氧对还原铜催化剂性能的影响

杨博, 李晶明, 周贵林, 谢筱帆, 李圭甲   

  1. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:1994-03-10 修回日期:1994-06-22 出版日期:1995-02-10 发布日期:1995-02-10

Influence of Oxygen on the Reduced Copper Catalyst for Acrylamide Synthesis

Yang Bo, Li Jingming, Zhou Guilin, Xie Xiaofan, Li Guijia   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1994-03-10 Revised:1994-06-22 Published:1995-02-10 Online:1995-02-10

PDF

345

被引次数

2 | 1

摘要： 还原铜和Raney铜是丙烯睛水合合成丙烯酞胺的非常有效的催化剂,丙烯腊转化率可达100%,丙烯酞胺选择性可达99%以上,而催化剂本身又是丙烯酞胺的阻聚剂[1-4].但是,在丙烯睛原料中的有机杂质,在水中的无机离子和溶解氧都能影响铜催化剂的催化行为[3-8].本文通过对铜催化剂的氧吸收速度的测定,以及X-射线物相分析,X-射线光电子能谱价态分析和热分析等方法,研究了氧对还原铜催化剂的结构和催化行为的影响.

关键词: 丙烯腈, 丙烯酰胺, 铜催化剂, 催比活性

Abstract: The degree of oxidation,composition and valence tstate of the reduced copper cata-lyst prepared by the reduction in the aqueous phase were examined by themal analysis,pow-der X-ray diffrection analysis and XPS measurements,The catalytic abilities,i.e,hydrationactivity of acrylonitrile and selectivity of acrylamide and ethylene cyanohydrin were decreasedobviously with increase of the degree of oxidation of the reduced catalyst Cu0 was found tobe the active component and Cu2+ and Cu+-the poisoning components. The results showed that a variety of active sites exists in the reduced copper catalystsurface and the oxidation of copper catalyst with dissolved oxygen in water was much morerapid thn tht with oxygen in gaseous phase.

Key words: acrylonitrile, acrylamide, copper catalyst, catalytic activity

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