Patents by Inventor Barun Gorain

Barun Gorain 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).

  • Separation of copper minerals from pyrite using air-metabisulfite treatment
    Patent number: 10258996
    Abstract: The present invention relates to flotation of sulfidic copper-molybdenum- and gold-containing minerals. More specifically, the invention relates to sulfoxy reagent-assisted floatation for separating of sulfides of copper, molybdenum and gold from pyrite, marcasite, pyrrhotite, arsenopyrite, and other gangue minerals following aerating by an oxidizing gas and contacting by a sulfoxy reagent. To promote collection and flotation the feed mineral materials are preferably not contacted with an externally generated non-oxidizing gas to lower the dissolved molecular oxygen content prior to flotation.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: April 16, 2019
    Assignee: Barrick Gold Corporation
    Inventor: Barun Gorain
  • SEPARATION OF COPPER MINERALS FROM PYRITE USING AIR-METABISULFITE TREATMENT
    Publication number: 20160199854
    Abstract: The present invention relates to flotation of sulfidic copper-molybdenum- and gold-containing minerals. More specifically, the invention relates to sulfoxy reagent-assisted floatation for separating of sulfides of copper, molybdenum and gold from pyrite, marcasite, pyrrhotite, arsenopyrite, and other gangue minerals following aerating by an oxidizing gas and contacting by a sulfoxy reagent. To promote collection and flotation the feed mineral materials are preferably not contacted with an externally generated non-oxidizing gas to lower the dissolved molecular oxygen content prior to flotation.
    Type: Application
    Filed: March 22, 2016
    Publication date: July 14, 2016
    Inventor: Barun Gorain
  • Separation of copper minerals from pyrite using air-metabisulfite treatment
    Patent number: 9346062
    Abstract: The present invention relates to flotation of sulfidic copper- molybdenum- and gold-containing minerals. More specifically, the invention relates to sulfoxy reagent-assisted flotation for separating of sulfides of copper, molybdenum and gold from pyrite, marcasite, pyrrhotite, arsenopyrite, and other gangue minerals following aerating by an oxidizing gas and contacting by a sulfoxy reagent. To promote collection and flotation the feed mineral materials are preferably not contacted with an externally generated non-oxidizing gas to lower the dissolved molecular oxygen content prior to flotation.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: May 24, 2016
    Assignee: Barrick Gold Corporation
    Inventor: Barun Gorain
  • Method to improve recovery of gold from double refractory gold ores
    Patent number: 8262768
    Abstract: The present invention is directed to a precious metal recovery process in which carbonaceous material, such as preg robbing carbon, is floated after sulfide oxidation to separate the carbonaceous material from the precious metal.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: September 11, 2012
    Assignee: Barrick Gold Corporation
    Inventors: Barun Gorain, Peter Kondos
  • SEPARATION OF COPPER MINERALS FROM PYRITE USING AIR-METABISULFITE TREATMENT
    Publication number: 20110155651
    Abstract: Embodiments of the present invention are directed to flotation of sulfidic materials following aerating by an oxidizing gas and contacting by a sulfoxy reagent.
    Type: Application
    Filed: December 3, 2010
    Publication date: June 30, 2011
    Applicant: BARRICK GOLD CORPORATION
    Inventor: Barun Gorain
  • Process for recovering gold and silver from refractory ores
    Patent number: 7922788
    Abstract: The present invention is directed to flotation of refractory gold sulfide ores in which the ore is ground, floated, the tailings reground, and refloated to produce gold-bearing concentrates.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: April 12, 2011
    Assignee: Barrick Gold Corporation
    Inventors: Daniel Hillier, Barun Gorain, Jacques McMullen
  • METHOD TO IMPROVE RECOVERY OF GOLD FROM DOUBLE REFRACTORY GOLD ORES
    Publication number: 20090071295
    Abstract: The present invention is directed to a precious metal recovery process in which carbonaceous material, such as preg robbing carbon, is floated after sulfide oxidation to separate the carbonaceous material from the precious metal.
    Type: Application
    Filed: September 11, 2008
    Publication date: March 19, 2009
    Applicant: BARRICK GOLD CORPORATION
    Inventors: Barun Gorain, Peter Kondos
  • PROCESS FOR RECOVERING GOLD AND SILVER FROM REFRACTORY ORES
    Publication number: 20090074607
    Abstract: The present invention is directed to flotation of refractory gold sulfide ores in which the ore is ground, floated, the tailings reground, and refloated to produce gold-bearing concentrates.
    Type: Application
    Filed: September 11, 2008
    Publication date: March 19, 2009
    Applicant: BARRICK GOLD CORPORATION
    Inventors: Daniel Hillier, Barun Gorain, Jacques McMullen