Patents by Inventor Mark E. Keeney

Mark E. Keeney 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).

  • Removal of humates from bayer process liquors
    Patent number: 4902425
    Abstract: A basic liquid ion exchange process in which a side stream of Bayer liquor is treated with a cationic compound preferably in the form of a polymer (poly-DADMAC) to extract a significant amount of the organic contaminants (humates) from the liquor. The contaminant loaded organic layer is separated from the treated liquor (which is returned to the system) and stripped by an alkali metal precipitation technique and the polymer is regenerated.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: February 20, 1990
    Assignee: Commonwealth Scientific & Industrial Research
    Inventor: Mark E. Keeney
  • Sodium carbonate (soda ash) crystal modification
    Patent number: 4472280
    Abstract: The invention comprises a method of removing anionic polymers and acidic organic impurities from aqueous trona solutions prior to crystallization whereby improved crystal formation is achieved which comprises treating such solutions with at least one nitrogen containing cationic compound consisting of water-soluble cationic polymers and fatty substituted quaternary ammonium salts followed by a solid adsorbant from the group consisting of clays and activated carbon.
    Type: Grant
    Filed: October 6, 1983
    Date of Patent: September 18, 1984
    Assignee: Nalco Chemical Company
    Inventor: Mark E. Keeney