Verfahren zur Entfernung von Wasser aus und zum Transport von Aliphatischen Diaminen

Details

Veröffentlichungs-Nr.

EP4151619

Aktenzeichen

EP21197670

Anmeldetag

20. September 2021

Veröffentlichung

22. März 2023

Rechtsraum

EP

IPC

C07C209/84C07C263/10C08G69/00

Abstract

The invention relates to a method for the removal of water from and transport of at least one aliphatic diamine comprising the following steps: a) providing a first composition including 60 to 98 wt.-% water and 2 to 40 wt.-% of the at least one aliphatic diamine with two -NH<2> groups per molecule, each of them bound to a primary or secondary carbon atom, b) removing water at least partially from said first composition by distillation at a first production location in a distillation apparatus comprising at least two distillation columns operating at different head pressures, thus generating a second composition comprising the diamine and ≤ 55 wt.-% water, wherein the vapours emerging from the distillation column operating at the higher head pressure are used to evaporate the liquid in the bottoms and/or the feed of a distillation column operating at the lower head pressure at least partially, c) transporting said second composition during a span of time t from the first production location to a second production location, wherein the span of time t including times for optional temporary storage is at least 6 h.

Anmelder

Firmen

Covestro Deutschland AG
Genomatica, Inc.

Land

🇩🇪 Deutschland

Fachgebiete