Lenzing Aktiengesellschaft

Korger Dietmar

Heinrich Firgo

Dieter Eichinger

Stephan Astegger

There is disclosed a method of removing amines from aqueous solutions thereof, in particular from waste waters obtained in cellulose processing. The aqueous amine solutions are contacted with a cation exchanger whose anchor groups consist of carboxyl groups, in order to charge the cation exchanger with the amines. The charged cation exchanger is treated with an aqueous solution of a weak acid having a pK.sub.a larger than 3.0 in order to elute the amines. The eluate is processed by way of distillation, wherein a portion of the weak acid is separated from the amines and reclaimed, if desired. The method according to the invention offers a simple and cheap way of disposing amine-containing waste waters.

Growing community of inventors

Steinbach, Austria

Korger Dietmar