Process to prepare ethylene amines

Abstract

The present invention relates to a process to prepare ethylene amines by the amination of ethylene oxide, ethylene glycol or ethanolamine in the presence of a catalyst, comprising a step wherein methylamine and/or ethylamine are removed from the reaction effluents.

1 . Process to prepare ethylene amines by the amination of ethylene oxide, ethylene glycol or ethanolamine in the presence of a catalyst, comprising a step wherein methylamine and/or ethylamine are removed from the reaction effluents, wherein the aminating compound is ammonia. 
     
     
         2 . Process of  claim 1  wherein the excess of aminating compound is recycled for reuse in the process. 
     
     
         3 . The process of  claim 1  or  2  wherein after the amination reaction first excess aminating compound is removed together with the methylamine and/or ethylamine and subsequently the methylamine and ethylamine are removed from the aminating compound. 
     
     
         4 . The process of  claim 1  or  2  wherein after the amination reaction first the main part of the excess of aminating compound is removed and subsequently the rest of the excess aminating compound is removed together with the methylamine and/or ethylamine. 
     
     
         5 . The process of any one of  claims 1  to  4  wherein methylamine and/or ethylamine are removed by a distillation step, an absorption step, an adsorption step, a cracking step or a combination of two or more of such steps. 
     
     
         6 . The process of  claim 5  wherein methylamine and/or ethylamine are removed by a distillation step. 
     
     
         7 . The process of any one of preceding  claims 1  to  6  wherein the aminating compound is ammonia.