Method of removing amines

Details Method of removing amines Method of removing amines

1990-05-24

1991-08-27

Silverman, Stanley S.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210670, 210677, 210673, 203 41, B01D 1504

Patent

active

050430750

ABSTRACT:
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.

REFERENCES:
patent: 2585490 (1952-02-01), Olsen
patent: 3475330 (1969-10-01), Gilles
patent: 3939071 (1976-02-01), Katzakian
patent: 4197195 (1980-04-01), Ochsenfeld et al.
patent: 4518503 (1985-05-01), Fermaglich
patent: 4655929 (1987-04-01), Tanaka et al.
patent: 4904383 (1990-02-01), Auerswald
Isaeva et al., Khim. Prom-st. (Moscow) 1983 (2); pp. 83-85 (English abstract).

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