Patents by Inventor Claude P. Etchart

Claude P. Etchart 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).

  • Alumina-alkali metal aluminum silicate agglomerate acid adsorbents
    Patent number: 5096871
    Abstract: Alumina-containing acid adsorbents and process for producing same. The adsorbents comprise activated alumina and an amorphous alkali (preferably sodium) aluminum silicate. The ratio of Si:Al in the amorphous material is preferably 0.25-100:1 by weight. A process for producing such adsorbents comprises treating activated alumina with a solution of an alkali metal silicate followed by an alkali metal aluminate, and forming agglomerates of the treated alumina at a temperature below about 90.degree. C., aging the agglomerates at a temperature in the range of 20.degree.-90.degree. C., and calcining the aged agglomerates at a temperature in the range of 200.degree.-500.degree. C. The adsorbent can be used to remove acidic materials from gases and liquids during industrial processes.
    Type: Grant
    Filed: July 3, 1990
    Date of Patent: March 17, 1992
    Assignee: Alcan International Limited
    Inventors: Gordon Lever, Claude P. Etchart, Francoise Tahiani