A process for preparing aromatic urethane by reacting an aromatic nitro compound, a hydroxy group-containing organic compound having at least one hydroxy group, and carbon monoxide at elevated temperatures under high pressure in the presence of a catalyst comprising a platinum group metal and/or a compound thereof, a Lewis acid, and a tertiary amine, which comprises allowing ferrous hydroxide and/or ferric hydroxide to coexist in the reaction system. This process so remarkably accelerates the reaction that it is completed in a short time, and the process enables the preparation of aromatic urethane in a high yield using a small amount of the platinum group metal catalyst.
一种制备芳香族聚
氨酯的工艺,该工艺是在高温高压下,在由
铂族
金属和/或其化合物、
路易斯酸和叔胺组成的催化剂存在下,使芳香族
硝基化合物、具有至少一个羟基的含羟基有机化合物和
一氧化碳发生反应,其中包括允许
氢氧化亚铁和/或
氢氧化铁共存于反应体系中。该工艺显著加快了反应速度,使反应在短时间内完成,而且只需少量
铂族
金属催化剂就能高产制备芳香族聚
氨酯。