Patents Assigned to International PGM Technologies
  • Recycling of solids in oxidative pressure leaching of metals using halide ions
    Patent number: 9039806
    Abstract: The invention provides a recycling step in an oxidative pressure leaching process for recovery of metals using halide ions, in which a portion of the leached solids are recycled back to the feed to the autoclave, to allow two or more passes through the high temperature leaching step.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: May 26, 2015
    Assignee: International PGM Technologies
    Inventors: David B. Dreisinger, Chris A. Fleming
  • RECYCLING OF SOLIDS IN OXIDATIVE PRESSURE LEACHING OF METALS USING HALIDE IONS
    Publication number: 20100206135
    Abstract: The invention provides a recycling step in an oxidative pressure leaching process for recovery of metals using halide ions, in which a portion of the leached solids are recycled back to the feed to the autoclave, to allow two or more passes through the high temperature leaching step.
    Type: Application
    Filed: May 11, 2007
    Publication date: August 19, 2010
    Applicant: International PGM Technologies
    Inventors: David Dreisinger, Chris Fleming
  • RECYCLING OF SOLIDS IN OXIDATIVE PRESSURE LEACHING OF METALS USING HALIDE IONS
    Publication number: 20100018351
    Abstract: The invention provides a recycling step in an oxidative pressure leaching process for recovery of metals using halide ions, in which a portion of the leached solids are recycled back to the feed to the autoclave, to allow two or more passes through the high temperature leaching step.
    Type: Application
    Filed: May 11, 2007
    Publication date: January 28, 2010
    Applicant: International PGM Technologies
    Inventors: Cashman R.S. Mason, Juris R. Harlamovs, David B. Dreisinger, Baruch Grinbaum
  • Oxidative pressure leach recovery using halide ions
    Patent number: 6315812
    Abstract: A method for recovering a precious metal from a host material, comprises the steps of subjecting the host material to an oxidative pressure leach process, in the presence of a halide ion constituent which is reactive with the precious metal, and at a temperature sufficient to cause at least a portion of the precious metal to be extracted by a leach solution; and recovering the precious metal from the leach solution.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: November 13, 2001
    Assignee: International PGM Technologies Ltd
    Inventors: Christopher A. Fleming, David Dreisinger, P. Terry O'Kane