METHOD FOR REDUCING THE CONTENT OF AN UNSATURATED AMINE IN A MIXTURE CONTAINING AN AMINO NITRILE, A DIAMINE, A DINITRILE OR MIXTURES THEREOF

摘要

The invention relates to a method for reducing the content of an aliphatic,monounsaturated amine (IV) in a mixture (V) containing an aminonitrile (I) ora diamine (II) or a dinitrile (III) or mixtures thereof and amine (IV),whereby: a) mixture (V) is reacted with an anionic nucleophile (VI) in aquantity ranging from 0.01 to 10 mols per mol of amine (IV) in mixture (V) ata temperature ranging from 50 to 200 ~C while obtaining mixture (VII), and; b)amino nitrile (I) or diamine (II) or dinitrile (III) or mixtures thereof areremoved by distillation from mixture (VII) at a temperature ranging from 50 to200 ~C and under a pressure ranging from 0.1 to 100 kPa while obtaining abottom product (VIII). The inventive method is characterized in that: c) anamino nitrile (I) or diamine (II) or dinitrile (III) or mixtures thereof areremoved by distillation from bottom product (VIII) at a temperature which islower than that selected in step b).