Patents by Inventor Serge Payant

Serge Payant 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).

  • Reduction of zinc oxide from complex sulfide concentrates using chloride processing
    Patent number: 6843976
    Abstract: An apparatus and a process for producing zinc oxide from a zinc-bearing material are provided. The process comprises the steps of leaching the complex sulfide material with hydrochloric acid, ferric chloride, and oxygen; precipitating iron from the leach solution using lime and oxygen; removing copper, silver, cadmium, cobalt and lead from the leach solution by cementation with zinc dust; precipitating zinc oxide from the leach solution using lime; and regenerating HCl from a calcium chloride leach filtrate solution to regenerate hydrochloric acid and precipitate gypsum. Related processes for recovering copper, silver, lead, and iron from complex sulfide materials and for recovering lead from residue by solubilizing lead chloride and precipitating it with lime are also provided.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: January 18, 2005
    Assignee: Noranda Inc.
    Inventors: Carole Allen, Serge Payant, Peter Kondos, Gezinus Van Weert
  • Production of zinc oxide from acid soluble ore using precipitation method
    Patent number: 6726889
    Abstract: The present invention relates to an apparatus and a process for producing zinc oxide from an acid soluble zinc-bearing material. The process according to the present invention comprises the steps of leaching the zinc oxide material with sulphuric acid; precipitating iron and silica from the leach solution using calcium oxide; removing copper, cadmium and cobalt from the leach solution by cementation with zinc dust; precipitating zinc oxide from the leach solution using calcium oxide; and upgrading zinc content in zinc oxide precipitates by separating zinc oxide from gypsum using a flotation or granulometric sizing technique.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: April 27, 2004
    Assignee: Noranda, Inc.
    Inventors: Yeonuk Choi, Serge Payant, Joo Kim, Anna-Maria Giove, Ramachandra Rao, James Andrew Finch
  • Production of zinc oxide from acid soluble ore using precipitation method
    Publication number: 20030031611
    Abstract: The present invention relates to an apparatus and a process for producing zinc oxide from an acid soluble zinc-bearing material. The process according to the present invention comprises the steps of leaching the zinc oxide material with sulphuric acid; precipitating iron and silica from the leach solution using calcium oxide; removing copper, cadmium and cobalt from the leach solution by cementation with zinc dust; precipitating zinc oxide from the leach solution using calcium oxide; and upgrading zinc content in zinc oxide precipitates by separating zinc oxide from gypsum using a flotation or granulometric sizing technique.
    Type: Application
    Filed: July 22, 2002
    Publication date: February 13, 2003
    Inventors: Yeonuk Choi, Serge Payant, Joo Kim, Anna-Maria Giove, Ramachandra Rao, James Andrew Finch
  • Reduction of zinc oxide from complex sulfide concentrates using chloride processing
    Publication number: 20020159927
    Abstract: An apparatus and a process for producing zinc oxide from a zinc-bearing material are provided. The process comprises the steps of leaching the complex sulfide material with hydrochloric acid, ferric chloride, and oxygen; precipitating iron from the leach solution using lime and oxygen; removing copper, silver, cadmium, cobalt and lead from the leach solution by cementation with zinc dust; precipitating zinc oxide from the leach solution using lime; and regenerating HCl from a calcium chloride leach filtrate solution to regenerate hydrochloric acid and precipitate gypsum. Related processes for recovering copper, silver, lead, and iron from complex sulfide materials and for recovering lead from residue by solubilizing lead chloride and precipitating it with lime are also provided.
    Type: Application
    Filed: February 27, 2001
    Publication date: October 31, 2002
    Inventors: Carole Allen, Serge Payant, Peter Condos, Gezinus Van Weert
  • Production of zinc oxide from complex sulfide concentrates using chloride processing
    Patent number: 6395242
    Abstract: The present invention relates to an apparatus and a process for producing zinc oxide from a zinc-bearing material. The process according to the present invention comprises the steps of leaching the complex sulfide material with hydrochloric acid and oxygen; precipitating iron from the leach solution using magnesium oxide and oxygen; removing copper, silver, cadmium, cobalt and lead from the leach solution by cementation with zinc dust; precipitating zinc oxide from the leach solution using magnesium oxide; and spray roasting the remaining magnesium chloride leach solution to regenerate hydrochloric acid and magnesium oxide. The present invention further relates to processes for recovering copper, silver, lead, and iron from complex sulfide materials.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: May 28, 2002
    Assignee: Noranda Inc.
    Inventors: Carole Allen, Peter Kondos, Serge Payant, Gezinus Van Weert, Anthonie Van Sandwijk