Process for the separation of hexamethylenediamine (HMD) from a feed mixture comprising hexamethylenediamine (HMD).Aminocapronitrila (ACN) and impurities polarograficamente redutu00ecveis (PRI)

摘要

Process for the separation of hexamethylenediamine (HMD) from a feed mixture comprising hexamethylenediamine (HMD).Aminocapronitrila (ACN) and impurities polarograficamente redutu00ecveis (PRI) ".The present invention relates to a method for separation of a mixture of hexamethylenediamine, aminocapronitrila and impurities polarograficamente reducible.With the use of fractional distillation in which the temperature in the grinding zone of the distillation column sigmoid varies along the length.To force a large part of impurities polarograficamente reducible (PRI) to co distill with aminocapronitrila.