Patents by Inventor Ronel Du Plessis KAPPES

Ronel Du Plessis KAPPES 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 for processing mineral material containing acid-consuming carbonate and precious metal in sulfide minerals
    Patent number: 9545636
    Abstract: Processing of mineral material containing precious metal with one or more sulfide minerals and non-sulfide gangue minerals including acid-consuming carbonate may include preparation of a sulfide concentrate by flotation with the flotation or conditioning prior to flotation using a gas comprising carbon dioxide. Flotation may be at an acidic pH without prior decomposition of the acid-consuming carbonate and may be without addition of acid for pH adjustment.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: January 17, 2017
    Assignee: NEWMONT USA LIMITED
    Inventors: James Nicholas Orlich, Ronel Du Plessis Kappes, John C. Gathje
  • METHOD FOR PROCESSING MINERAL MATERIAL CONTAINING ACID-CONSUMING CARBONATE AND PRECIOUS METAL IN SULFIDE MINERALS
    Publication number: 20160074872
    Abstract: Processing of mineral material containing precious metal with one or more sulfide minerals and non-sulfide gangue minerals including acid-consuming carbonate may include preparation of a sulfide concentrate by flotation with the flotation or conditioning prior to flotation using a gas comprising carbon dioxide. Flotation may be at an acidic pH without prior decomposition of the acid-consuming carbonate and may be without addition of acid for pH adjustment.
    Type: Application
    Filed: April 23, 2014
    Publication date: March 17, 2016
    Inventors: James Nicholas ORLICH, Ronel Du Plessis KAPPES, John C. GATHJE