According to the present invention, a method for separating a primary amine being an N,N- dialkylbisaminoalkylether, from mixtures comprising said primary amine and at least one of a secondary amine being an N,N,N'-trialkylbisaminoalkylether and a tertiary amine being an N,N,N',N'-tetraalkylbisaminoalkylether, comprising the steps: (α) joining said mixture and at least one of a ketone and an aldehyde for reacting said primary amine with said at least one of a ketone and an aldehyde, thereby providing a primary amine based imine by a Schiff base reaction; (β) separating the primary amine based imine from said at least one of the secondary or tertiary amine; and (γ) recovering the primary amine from its primary amine based imine by hydrolysis of the primary amine based imine.
根据本发明,提供了一种从包括所述主要胺和至少一种次要胺和/或三级胺的混合物中分离主要胺的方法,所述主要胺为N,N-二烷基双
氨基烷基醚,所述次要胺为N,N,N'-三烷基双
氨基烷基醚,所述三级胺为N,N,N',N'-四烷基双
氨基烷基醚,包括以下步骤:(α)将所述混合物和至少一种酮和/或醛结合,以使所述主要胺与所述酮和/或醛中的至少一种反应,从而通过Schiff碱反应提供基于主要胺的
亚胺;(β)从所述至少一种次要或三级胺中分离基于主要胺的
亚胺;和(γ)通过
水解基于主要胺的
亚胺来回收主要胺。