Patents by Inventor Chu Yong Cheng

Chu Yong Cheng 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).

  • Publication number: 20150152522
    Abstract: A process for separating Co from Ni in an aqueous solution comprises subjecting the solution to extraction and using kinetic differences between Ni and Co in the extraction for achieving at least a partial separation of Co from Ni. This is effected by controlling the duration of the extraction so that a major portion of Co and a minor portion of Ni is extracted from the solution to produce a loaded extractant, enriched in Co and depleted in Ni compared to the feed solution, and a Co-depleted raffinate containing Ni. In a further embodiment, the invention utilizes kinetic differences between Ni and Co during striping for effecting separation of Ni and Co. The loaded extractant can be subjected to a bulk stripping or a selective stripping operation to obtain Co and Ni solutions from which Ni and Co can be recovered. The process may be incorporated in a hydrometallurgical process for the extraction of Ni and/or Co from an ore or concentrate containing Ni and Co.
    Type: Application
    Filed: February 11, 2015
    Publication date: June 4, 2015
    Inventors: David Llewellyn Jones, Tannice Marie McCoy, Keith Edward Mayhew, Chu Yong Cheng, Keith Raymond Barnard, Wensheng Zhang
  • Patent number: 8979976
    Abstract: A process for separating Co from Ni in an aqueous solution comprises subjecting the solution to extraction and using kinetic differences between Ni and Co in the extraction for achieving at least a partial separation of Co from Ni. This is effected by controlling the duration of the extraction so that a major portion of Co and a minor portion of Ni is extracted from the solution to produce a loaded extractant, enriched in Co and depleted in Ni compared to the feed solution, and a Co-depleted raffinate containing Ni. In a further embodiment, the invention utilizes kinetic differences between Ni and Co during striping for effecting separation of Ni and Co. The loaded extractant can be subjected to a bulk stripping or a selective stripping operation to obtain Co and Ni solutions from which Ni and Co can be recovered. The process may be incorporated in a hydrometallurgical process for the extraction of Ni and/or Co from an ore or concentrate containing Ni and Co.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: March 17, 2015
    Assignees: CESL Limited, Commonwealth Scientific and Industrial Research Organisation
    Inventors: David Llewellyn Jones, Tannice Marie McCoy, Keith Edward Mayhew, Chu Yong Cheng, Keith Raymond Barnard, Wensheng Zhang
  • Publication number: 20110283838
    Abstract: A process for separating Co from Ni in an aqueous solution comprises subjecting the solution to extraction and using kinetic differences between Ni and Co in the extraction for achieving at least a partial separation of Co from Ni. This is effected by controlling the duration of the extraction so that a major portion of Co and a minor portion of Ni is extracted from the solution to produce a loaded extractant, enriched in Co and depleted in Ni compared to the feed solution, and a Co-depleted raffinate containing Ni. In a further embodiment, the invention utilizes kinetic differences between Ni and Co during striping for effecting separation of Ni and Co. The loaded extractant can be subjected to a bulk stripping or a selective stripping operation to obtain Co and Ni solutions from which Ni and Co can be recovered. The process may be incorporated in a hydrometallurgical process for the extraction of Ni and/or Co from an ore or concentrate containing Ni and Co.
    Type: Application
    Filed: May 20, 2010
    Publication date: November 24, 2011
    Applicants: CESL LIMITED
    Inventors: David Llewellyn JONES, Tannice Marie McCOY, Keith Edward MAYHEW, Chu Yong CHENG, Keith Raymond BARNARD, Wensheng ZHANG
  • Patent number: 7935322
    Abstract: A process for the separation of nickel, cobalt or both from impurity elements selected from one or more of calcium, magnesium, manganese and chloride contained in a leach solution, the process comprising the step of subjecting the leach solution to solvent extraction using a carboxylic acid (such as Versatic 10), a hydroxyoxime such as LIX 63, a kinetic accelerator such as TBP, and optionally a stabilizer.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: May 3, 2011
    Assignee: Commonwealth Scientific & Indistrial Research Organisation
    Inventors: Chu Yong Cheng, Mark Daniel Urbani
  • Patent number: 7837959
    Abstract: A process for separating one or more metal ions forming a first group of metal ions such as copper, zinc and ferric ions, from one or more other metal ions forming a second group of metal ions such as cobalt and nickel, comprising: contacting an aqueous solution comprising said first and second groups of metal ions with an organic solution comprising a phosphinic acid and a hydroxyoxime to extract one of said groups of metal ions into the organic phase, and separating the organic and aqueous phases.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: November 23, 2010
    Assignee: Commonwealth Scientific and Industrial Research Organisation
    Inventors: Chu Yong Cheng, Mark Daniel Urbani
  • Publication number: 20080245734
    Abstract: A process for separating one or more metal ions forming a first group of metal ions such as copper, zinc and ferric ions, from one or more other metal ions forming a second group of metal ions such as cobalt and nickel, comprising: contacting an aqueous solution comprising said first and second groups of metal ions with an organic solution comprising a phosphinic acid and a hydroxyoxime to extract one of said groups of metal ions into the organic phase, and separating the organic and aqueous phases.
    Type: Application
    Filed: September 23, 2005
    Publication date: October 9, 2008
    Inventors: Chu Yong Cheng, Mark Daniel Urbani
  • Publication number: 20080038168
    Abstract: A process for the separation of cobalt and/or manganese from impurity elements selected from one or more of calcium and magnesium contained in a leach solution, the process comprising the step of subjecting the leach solution to solvent extraction using an organic solution of a carboxylic acid such as Versatic 10 and a hydroxyoxime such as LIX 63, optionally together with a stabilzer.
    Type: Application
    Filed: January 28, 2005
    Publication date: February 14, 2008
    Applicant: Commonwealth Scientific And Industrial Research Organisation
    Inventors: Chu Yong Cheng, Mark Daniel Urbani
  • Publication number: 20040050212
    Abstract: A method of separating nickel, cobalt or both from other cations contained in a leach solution, the method including the steps of subjecting the leach solution to separate solvent extraction steps using an organophosphinic acid, a carboxylic acid and an organophosphinic acid.
    Type: Application
    Filed: September 17, 2003
    Publication date: March 18, 2004
    Inventors: Chu Yong Cheng, Martin Houchin