Patents by Inventor Norman W. Coulson

Norman W. Coulson 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).

  • Process for recovering concentrated, purified tungsten values from brine
    Patent number: 4279869
    Abstract: A process for recovering concentrated, purified tungsten values, such as ammonium paratungstate, from a brine containing minor amounts of soluble tungsten and a substantial concentration of impurities, the brine having a pH in the range of from about 7.0 to about 8.5. In general, the process comprises: contacting the brine with a substantially water-insoluble ion exchange resin to adsorb the soluble tungsten; eluting the adsorbed tungsten values from the ion exchange resin; treating the eluate to convert the tungsten values to an extractable species; recovering the extractable species of tungsten values from the eluate to substantially concentrate the tungsten values; contacting the concentrated tungsten values with an extractant to substantially load the extractant with the concentrated tungsten values; and recovering from the extractant a product having concentrated, purified tungsten values.
    Type: Grant
    Filed: December 13, 1979
    Date of Patent: July 21, 1981
    Assignee: Kerr-McGee Corporation
    Inventor: Norman W. Coulson