B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
362/41
B01J 39/16 (2006.01) B01J 39/04 (2006.01) C02F 1/42 (2006.01)
Patent
CA 2017689
Abstract: To remove 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 PKa larger than 3.0 in order to elute the amines, and - 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.
Astegger Stephan
Eichinger Dieter
Firgo Heinrich
Korger Dietmar
Fetherstonhaugh & Co.
Lenzing Aktiengesellschaft
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