| abstract |
Process for the simultaneous production of 6-aminocapronitrile and hexamethylenediamine, starting from adiponitrile, comprising the steps DOLLAR A a) hydrogenation of adiponitrile in the presence of a catalyst which contains an element of the eighth subgroup as catalytically active component, to obtain a mixture containing 6- Aminocapronitrile, hexamethylene diamine, adiponitrile and high boilers, DOLLAR A b) Distillative separation of hexamethylene diamine from the mixture containing 6-aminocapronitrile, hexamethylenediamine, adiponitrile and high boilers, DOLLAR A and either DOLLAR A c1) -dinitrile DARRON and subsequent separation of ) Distillative removal of adipodinitrile DOLLAR A or DOLLAR A c2) Simultaneous distillative removal of 6-aminocapronitrile and adipodinitrile in separate fractions, DOLLAR A characterized in that the bottom temperatures are below 185 ° C. in steps d1) or c2). |