Patents Assigned to Redox Solutions, LLC
  • Methods of treatment of chromite ore processing residue
    Patent number: 8192705
    Abstract: Methods to reduce hexavalent chromium (Cr(VI)) in chromite processing wastes include one or more of the following steps: contacting the chromite processing wastes with an oxygen scavenger or chemical reducer; permitting the chromite processing wastes to react with the oxygen scavenger or chemical reducer; contacting the chromite processing wastes with ferrous ion; contacting the chromite processing wastes with sulfide ion; and, contacting the chromite processing wastes with ferrous sulfide.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: June 5, 2012
    Assignee: Redox Solutions, LLC
    Inventors: Steven A. Chisick, Timothy Clark Heffernan, Thomas P. McCullough, Gary Joel Meyer
  • Methods of treatment of chromite ore processing residue
    Patent number: 7670576
    Abstract: Methods to reduce hexavalent chromium (Cr(VI)) in chromite processing wastes include one or more of the following steps: contacting the chromite processing wastes with an oxygen scavenger or chemical reducer; permitting the chromite processing wastes to react with the oxygen scavenger or chemical reducer; contacting the chromite processing wastes with ferrous ion; contacting the chromite processing wastes with sulfide ion; and, contacting the chromite processing wastes with ferrous sulfide.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: March 2, 2010
    Assignee: Redox Solutions, LLC
    Inventors: Steven A. Chisick, Timothy Clark Heffernan, Thomas P. McCullough, Gary Joel Meyer