Patents by Inventor John de Klerk Batty

John de Klerk Batty 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).

  • Stable ferric arsenate precipitation from acid copper solutions whilst minimising copper losses
    Patent number: 7314604
    Abstract: A method of which includes the steps of introducing an acidic solution containing (V), copper, ferric iron and ferrous iron into a first tank of a series of continuously stirred tank reactors and, in the first tank, adding air to the solution; heating the solution to an elevated temperature; recycling a portion of selectively precipitated ferric arsenate compounds to the said first tank; and seeding the solution with ferric arsenate compounds.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: January 1, 2008
    Assignee: Billiton Intellectual Property, B.V.
    Inventors: Paul Harvey, Colette Kock, John de Klerk Batty
  • Heat transfer in heap leaching of sulphide ores
    Patent number: 6884280
    Abstract: A method of leaching sulphide mineral concentrates wherein heat generated by bioleaching of sulphide mineral concentrates in at least one reactor is transferred into a heap in which bio-assisted leaching takes place.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: April 26, 2005
    Assignee: Billiton SA Limited
    Inventors: John de Klerk Batty, Alan Norton
  • Recovery of precious metal from sulphide minerals by bioleaching
    Patent number: 6860919
    Abstract: A method of recovering a precious metal from a sulphide mineral slurry which contains the precious metal which includes the steps of subjecting the slurry to a bioleaching process, supplying a feed gas which contains in excess of 21% oxygen by volume to the slurry, and recovering precious metal from a bioleach residue of the bioleaching process.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: March 1, 2005
    Assignee: Billiton Intellectual Property, B.V.
    Inventors: Alan Norton, John de Klerk Batty, David William Dew, Petrus Basson
  • Heat transfer in heap leaching of sulphide ores
    Publication number: 20030167879
    Abstract: A method of leaching sulphide mineral concentrates wherein heat generated by bioleaching of sulphide mineral concentrates in at least one reactor is transferred into a heap in which bio-assisted leaching takes place.
    Type: Application
    Filed: March 28, 2003
    Publication date: September 11, 2003
    Applicant: BILLITON SA LIMITED.
    Inventors: John de Klerk Batty, Alan Norton