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