Study on Catalyzed Cyclization of Ethylenediamine in Gas-Solid Phase

This paper concerned about the study on manufacture routes for piperazine and triethylenediamine from ethylenediamine in fixed bed reactor.A series of catalysts were prepared and examined.The zeolite HZSM-5 with KCl modified was found to be the best one.Furthermore,the reaction parameters were optimized.The temperature is about 340℃,the concentration of ethylenediamine is 50%,and the input speed is 0 2ml/min.Under above condition,the conversion of ethylenediamine is above 93%.The selectivity of the reaction is up to 93%.