| 摘要 |
PURPOSE:To efficiently produce ethylenediamine even under ordinary pressure by reacting ammonia with monoethanolamine in the presence of a catalyst composed of zeolite treated with ethylenediaminetetracetic acid. CONSTITUTION:This production of ethylenediamine is carried out by reacting ammonia with monoethanolamine in the presence of a catalyst at 200 to 500 deg.C in an atmosphere of an inert gas (e.g. nitrogen) according to demand. This catalyst is prepared by heat-treating zeolite (e.g. mordenite) in an aqueous solution of ethylenediaminetetraacetic acid (hereinafter abbreviated EDTA) and has a high activity and a long service life. The heat treatment is carried out by using EDTA in an amount of 0.1mumol to 1mol based on 1g zeolite. The ratio of ammonia to monoethanolamine is 10 to 200 on molar base. Ethylenediamine is an aliphatic amine compound useful as an agrochemical, a chelating agent, etc. |
