The invention relates to a process for preparing triethylenetetramine (TETA), which, comprises the following steps:
a) reaction of ethylenediamine (EDA) with formaldehyde and hydrocyanic acid (HCN) in a molar ratio of EDA to formaldehyde to HCN of from 1:1.5:1.5 to 1:2:2 to give ethylenediaminediacetonitrile (EDDN),
b) hydrogenation of the EDDN obtained in step a) in the presence of a catalyst and a solvent.
这项发明涉及一种制备
三乙烯四胺(TETA)的过程,包括以下步骤:a)
乙二胺(E
DA)与
甲醛和
氰化氢(HCN)按照
乙二胺与
甲醛与
氰化氢的摩尔比为1:1.5:1.5至1:2:2反应,得到
乙二胺二乙腈(EDDN),b)在存在催化剂和溶剂的情况下氢化步骤a)中得到的EDDN。