The present invention provides a method of producing an ethanolamine, with a low production ratio of a dialkanolamine (for example, less than 30% by weight). A process for producing an alkanolamine of the present invention includes reacting an alkylene oxide with ammonia to obtain a reaction product containing a monoalkanolamine, a dialkanolamine, and a trialkanolamine; separating the dialkanolamine from the reaction product; and recycling at least a portion of the dialkanolamine for the reaction of an alkylene oxide with ammonia, wherein in the recycling step, the dialkanolamine is supplied in a molar ratio of the alkylene oxide (moles) to a total amount (moles) of ammonia and the dialkanolamine of 0.08 or more and less than 0.26.
本发明提供了一种生产
乙醇胺的方法,其具有低二烷醇胺(例如,重量小于30%)的生产比率。本发明的生产二烷醇胺的方法包括将烯氧化物与
氨反应,以获得含有一烷醇胺、二烷醇胺和三烷醇胺的反应产物;从反应产物中分离出二烷醇胺;并至少回收部分二烷醇胺用于烯氧化物与
氨的反应,其中在回收步骤中,二烷醇胺以烯氧化物(摩尔)与
氨和二烷醇胺的总量(摩尔)的摩尔比为0.08或更多但小于0.26。