碳酸二乙酯气固相催化合成N-乙基乙二胺

Gas-solid phase Catalytic Synthesis of N-Ethylethylenediamine from Diethyl Carbonate

摘要:

创新性的以绿色化工原料碳酸二乙酯和乙二胺为原料，气固相催化合成N-乙基乙二胺。考察了不同催化剂（丝光沸石、β沸石、Y分子筛）、碱金属 (Li、Na、K)离子改性的催化剂和反应条件对该烷基化反应的影响。结果表明：在实验所用的催化剂中，Y分子筛具有最高的催化活性；Y分子筛用不同阳离子改性后对反应有显著影响，其中NaY分子筛催化效果最好；在反应温度为240℃，ｎ( 乙二胺)／ｎ( 碳酸二乙酯) =2，质量空速为15.8/h，氮气流速为120mL/min的反应条件下，N-乙基乙二胺的产率可以达到93.1%。

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 reacting temperature 240℃，n（ethylene diamine）/n（diethyl carbonate）＝2，Weight Hourly Space Velocity for 15.8/ h and flowing rate of nitrogen for 120 mL/min，the N - ethyl ethylenediamine yield can reach up to 93.1%．