Patents by Inventor Korger Dietmar

Korger Dietmar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5043075
    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.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: August 27, 1991
    Assignee: Lenzing Aktiengesellschaft
    Inventors: Korger Dietmar, Stephan Astegger, Dieter Eichinger, Heinrich Firgo