化工进展

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改性HZSM-5催化胺化异丙醇胺合成1,2-丙二胺

余秦伟,李亚妮,梅苏宁,张前,杨建明,吕剑   

  1. 西安近代化学研究所,陕西 西安 710069
  • 出版日期:2014-08-05 发布日期:2014-08-05

Synthesis of 1,2-propanediamine by amination of isopropanolamine on modified HZSM-5

YU Qinwei,LI Yani,MEI Suning,ZHANG Qian,YANG Jianming,Lü Jian   

  1. Xi’an Modern Chemistry Research Institute,Xi’an 710069,Shaanxi,China
  • Online:2014-08-05 Published:2014-08-05

摘要: 醇的催化胺化是胺类化合物制备的重要发展方向。本文研究了改性HZSM-5催化氨化异丙醇胺制备1,2-丙二胺反应,通过Zn、P对HZSM-5的改性,提高了目标产物选择性,研究了工艺参数对反应的影响,较优的反应条件为:温度320℃,压力3.0MPa,氨∶异丙醇胺=65∶1(摩尔比),气体空速4300h?1。在优选条件下,异丙醇胺转化率为68.2%,1,2-丙二胺选择性为61.5%,2,6-二甲基哌嗪选择性为7.1%,2,5-二甲基哌嗪选择性为10.2%。

关键词: 1, 2-丙二胺, HZSM-5, 选择性, 胺化, 催化, 合成

Abstract: Amination of alcohols is one of the most important methods for preparing amines and the most potential application in the future. Synthesis of 1,2-propanediamine via amination of isopropanolamine on modified HZSM-5 was studied. The acid species and distribution of HZSM-5 were modified by P and Zn,and then the selectivity of 1,2-propanediamine was improved. The reaction parameters were optimized and the process of amination of isopropanolamine was improved. The optimum reaction conditions were as follows:reaction temperature 320℃,reaction pressure 3.0MPa,molar ratio of NH3 to isopropanolamine 65∶1,space velocity 4300h-1. Under the optimized conditions,conversion of isopropanolamine was 68.2%,selectivities of 1,2-propanediamine,2,6-dimethylpiperzine and 2,5-dimethylpiperzine were 61.5%,7.1% and 10.2%,respectively.

Key words: 1,2-propanediamine, HZSM-5, selectivity, amination, catalysis, synthesis

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