Cui Zi-xiang
2013
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Journal
Fine chemicals
Abstract
N-Ethylethylenediamine was synthetized innovatively by using diethyl carbonate,which was a green industrial chemical,and ethylenediamine as raw materials.The effects of many factors were investigated for the reaction of N-alkylation,which included different catalysts(β zeolites,mordenites and Y zeolites),Y zeolites modified by alkaline metals(Li,Na,K) and reaction conditions.The results show that Y zeolites have the best catalytic activity.It is proved that NaY zeolites have the best catalytic effect.Under the conditions of reaction temperature 240 ℃,n(ethylene diamine)/n(diethyl carbonate)=2,weight hourly space velocity 15.8 h-1 and flowing rate of nitrogen 120 mL/min,the yield of N-ethylethylenediamine can reach 93.1%.