Patent ID: 9682917
Date: 2017-06-20
CPC Classifications: C07C

Claim:
1. A process for treating a substance mixture comprising an aromatic amine, wherein said aromatic amine comprises aniline or 2,4-diaminotoluene, wherein the substance mixture is a first substance mixture and comprises an aromatic amine and compounds having a higher boiling point than the aromatic amine, comprising: I) distillatively separating said first substance mixture in a first distillation unit to separate off at least some of said aromatic amine and to additionally obtain a first bottom product, with said first bottom product being discharged from said first distillation unit; wherein once discharged said bottom product from said first distillation unit is diluted with a condensed top product from a distillation unit which is distinct from said first distillation unit and/or with a composition comprising methanol; wherein said condensed top product originating from a distillation unit which is distinct from said first distillation unit comprises ≧80% by weight to <100% by weight of low-boilers and ≧0% by weight to <20% by weight of water, and wherein the content of said aromatic amine in said bottom product from said first distillation unit (