发明名称 |
Method of removing amines |
摘要 |
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 pKa 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.
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申请公布号 |
US5043075(A) |
申请公布日期 |
1991.08.27 |
申请号 |
US19900528578 |
申请日期 |
1990.05.24 |
申请人 |
LENZING AKTIENGESELLSCHAFT |
发明人 |
DIETMAR, KORGER;ASTEGGER, STEPHAN;EICHINGER, DIETER;FIRGO, HEINRICH |
分类号 |
C07D295/02;B01J39/04;C02F1/42;C07C209/86 |
主分类号 |
C07D295/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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