Patents by Inventor Marthie KOTZE

Marthie KOTZE 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).

  • Method of recovering base metals from low grade ores and residues
    Patent number: 10724117
    Abstract: A method of recovering a metal from a low-grade ore which is subjected to cyanide leaching to produce a PLS which contains a metal cyanide which is removed from the PLS by ultrafiltration and nano-filtration, and then acidified and sulphidised to produce a metal sulphide from which the metal is extracted, and hydrogen cyanide which is recycled to the cyanide leaching step.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: July 28, 2020
    Assignee: SIRCH GROUP (PTY) LTD.
    Inventors: Nicholas Conradie, Marthie Kotze
  • A METHOD OF RECOVERING BASE METALS FROM LOW GRADE ORES AND RESIDUES
    Publication number: 20170152583
    Abstract: A method of recovering a metal from a low-grade ore which is subjected to cyanide leaching to produce a PLS which contains a metal cyanide which is removed from the PLS by ultrafiltration and nano-filtration, and then acidified and sulphidised to produce a metal sulphide from which the metal is extracted, and hydrogen cyanide which is recycled to the cyanide leaching step.
    Type: Application
    Filed: June 18, 2015
    Publication date: June 1, 2017
    Inventors: Nicholas CONRADIE, Marthie KOTZE