[EN] METHOD FOR MAKING 2-METHYLPENTAMETHYLENEDIAMINE AND ADIPONITRILE WITH HOT AMMONIA SWEEP<br/>[FR] PROCÉDÉ DE FABRICATION DE 2-MÉTHYLPENTAMÉTHYLÈNEDIAMINE ET D'ADIPONITRILE SOUS BALAYAGE D'AMMONIAC CHAUD
申请人:INVISTA TECHNOLOGIES SRL
公开号:WO2015013427A1
公开(公告)日:2015-01-29
Disclosed is a process for extending the useful life of a hydrogenation catalyst for making diamines in which 2-methylglutaronitrile and adiponitrile are charged separately to the catalyst in sequence with an intervening step of contacting the catalyst with hydrogen and ammonia at elevated temperature.
披露了一种延长制备二胺的氢化催化剂的有效寿命的过程,其中2-甲基戊二腈和己二腈分别按顺序充入催化剂,并在中间步骤中将催化剂与氢气和氨在高温下接触。