METHOD FOR SEPARATING N,N,N'-TRIMETHYLBISAMINOETHYLETHER AND/OR N,N-DIMETHYLBISAMINOETHYLETHER FROM A MIXTURE

摘要

The present invention relates to a method for separating Ν,Ν,Ν'- trimethylbisaminoethylether and/or Ν,Ν-dimethylbisaminoethylether, from a mixture A comprising Ν,Ν,Ν'-trimethylbisaminoethylether, and N,N-dimethylbisaminoethylether, wherein said method comprises the steps of: (a) contacting said mixture A with an acylating agent, to form a mixture B comprising the amides of Ν,Ν,Ν' -trimethylbisaminoethylether and of N,N-dimethylbisaminoethylether, respectively; and (b1) separating the amide of Ν,Ν,Ν'-trimethylbisaminoethylether from mixture B; and (c1) recovering Ν,Ν,Ν'-trimethylbisaminoethylether from its amide by means of a transamidation reaction; and/or (b2) separating the amide of Ν,Ν-dimethylbisaminoethylether from mixture B; and (c2) recovering Ν,Ν-dimethylbisaminoethylether from its amide by means of a transamidation reaction.