Study The Synthesis Process Of Ethylenediamine By Dichlorethane

As an important intermediates, Amines are widely used in chemical industry,medicine field and many other fields.In this paper, Ethylenediamine was prepared by aminolysis of dichlorethane with a tank reactor, as well as, with a tubular reactor. Moreover, the ammoniation process in a successive Kettle-Reactor was simulated by Aspen Plus.The effects of several factors were investigated and the optimized conditions in the tank reactor were:the molar ratio of ammonia and dichlorethane 15:1, the concentration of the ammonia 50%, the reaction temperature 160℃, the system pressure 6MPa, the reaction time 30min. Thus the conversion of dichlorethane was 93.97%.The apparent kinetics of the reaction was studied on the optimized conditions, the apparent kinetics equations were established as follow: dCA/dt=-3.1417e16136/RT·CA0.92351In which CA was the concentration of dichlorethane, the reaction rate constant k=-3.1417e-16136/RT, the reaction activity energy E=16136J/mol, the reaction order n=0.92351.Based on the industrial background, Continuous preparing Ethylenediamine by aminolysis of dichlorethane was also studied in this paper.The simulation results of ammoniation process in a successive Kettle-Reactor were:the molar ratio of ammonia and dichlorethane 15:1, the concentration of the ammonia 50%, the system pressure 6MPa, the reaction time 10min, the conversion of dichlorethane at 120℃, 140℃,160℃,180℃was 0.9434,0.9558,0.9649,0.9716.Based on the research in tank reactor, the ammoniation process was studied in tubular reactor with inner diameter of 2mm and length of 40m. The reaction conditions were:the molar ratio of ammonia and dichlorethane 15:1, the concentration of the ammonia 50%, the system pressure 6MPa, the reaction time 10min, the volume velocity 1.13L/h.