Patents by Inventor Johan Louis Havenga

Johan Louis Havenga 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).

  • Treatment of chemical feedstocks
    Patent number: 9468975
    Abstract: A process for treating a zirconium containing feedstock includes fluorinating a feedstock comprising dissociated zircon (‘DZ’) to obtain a zirconium fluorine compound and a silicon fluorine compound. The zirconium fluorine compound is separated from the silicon fluorine compound is provided. Optionally, the zirconium fluorine compound is reacted with a non-fluorine halogen, an alkali metal non-fluorine halide or an alkaline-earth metal non-fluorine halide, thereby to obtain a zirconium non-fluorine halide. The zirconium fluorine compound or, when present, the zirconium non-fluorine halide is subjected to plasma reduction, in a plasma reduction stage, in the presence of a reductant, to obtain metallic zirconium.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: October 18, 2016
    Assignee: The South African Nuclear Energy Corporation Limited
    Inventors: Johannes Theodorus Nel, Willem Liebenberg Retief, Johan Louis Havenga, Wilhelmina Du Plessis, Johannes Petrus Le Roux
  • TREATMENT OF CHEMICAL FEEDSTOCKS
    Publication number: 20140238195
    Abstract: A process for treating a zirconium containing feedstock includes fluorinating a feedstock comprising dissociated zircon (‘DZ’) to obtain a zirconium fluorine compound and a silicon fluorine compound. The zirconium fluorine compound is separated from the silicon fluorine compound is provided. Optionally, the zirconium fluorine compound is reacted with a non-fluorine halogen, an alkali metal non-fluorine halide or an alkaline-earth metal non-fluorine halide, thereby to obtain a zirconium non-fluorine halide. The zirconium fluorine compound or, when present, the zirconium non-fluorine halide is subjected to plasma reduction, in a plasma reduction stage, in the presence of a reductant, to obtain metallic zirconium.
    Type: Application
    Filed: October 11, 2012
    Publication date: August 28, 2014
    Applicant: The South African Nuclear Energy Corporation Limited
    Inventors: Johannes Theodorus Nel, Willem Liebenberg Retief, Johan Louis Havenga, Wilhelmina Du Plessis, Johannes Petrus Le Roux