Patents by Inventor Gregory P. Behrens

Gregory P. Behrens 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).

  • Method and system for removal of selenium from FGD scrubber purge water
    Patent number: 6235204
    Abstract: A method for removing the oxy-anions of selenium from FGD scrubber purge water. The purge water is contacted with free hydroxyl radicals to effect oxidation of reduced forms of sulfur to sulfate and the destruction of sulfur-nitrogen compounds present in the purge water. The purge water is then subjected to chemical reduction and co-precipitation of selenium with an amount of ferrous ions effective to remove the oxy-anions of selenium in the liquid in less than 30 minutes of reaction time. The resultant ferrous-selenium solids generated are separated and stabilized to elemental selenium in a separate reaction vessel.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: May 22, 2001
    Assignee: Radian International LLC
    Inventors: Frank J. Castaldi, Gregory P. Behrens, Oliver W. Hargrove, Jr.