METHOD FOR PREPARING N-(2-AMINOETHYL)ETHANE-1,2-DIAMINE

摘要

The invention discloses a method for preparation of N-(2-aminoethyl)ethane-1,2-diamine (DETA), which comprises steps of preparing a mixture by dissolving iminodiacetonitrile (IDAN) in an organic solvent and adding an anion exchange resin of OH type and a stabilizing agent for IDAN, subjecting the mixture to hydrogenation in the presence of a hydrogenation catalyst and a first aid at a temperature of 50-150°C, preferably 70-90°C, and under a pressure of 5-25 Mpa, preferably 9-14 Mpa to obtain DETA. In comparison with the known methods, the process of the present invention may inhibit the decomposition of IDAN, eliminate the poisoning factors for the catalyst, so as to prolong the service life of the catalyst, improve the efficiency of the process and obtain the product with high purity.