Patents Assigned to Firma Gebr. Knauf Westdeutsche Gipswerke
  • Method of producing an adsorbent from bloating minerals and calcium sulfate hemihydrate
    Patent number: 4925826
    Abstract: The invention relates to a method of producing an adsorbent where an expanded granular bloating mineral and calcium sulfate hemihydrate are mixed to form a granulated material where the calcium sulfate hemihydrate is converted in toto into calcium sulfate dihydrate by the addition of a surplus of water, and where the free water is removed by drying. It is desirable that the proportion of bloating mineral be reduced, that the adsorption effect be substantially retained and the hardness of the adsorbent be increased without any additives.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: May 15, 1990
    Assignees: Firma Gipswerk Embsen GmbH & Co. Baustoffproduktion KG, Firma Gebr. Knauf Westdeutsche Gipswerke
    Inventors: Heiner Hamm, Peter Hartmann, Karl-Heinz Kampner, Hans-Friedrich Kurandt