Patents Assigned to Oabrand PTY. Limited
  • Method for the continuous chemical reduction and removal of mineral matter contained in carbon structures
    Patent number: 4780112
    Abstract: A process for treating carbon to reduce the ash content therein. The process involves treating the carbon with a fluorine acid solution which consists of an aqueous solution of hydrofluorosilicic acid and hydrogen fluoride, such that the available metal oxides are converted to metal fluorides and/or metal fluorosilicates and separating the treated carbon from the metal fluorides and/or metal fluorosilicates produced by the treatment.
    Type: Grant
    Filed: December 10, 1986
    Date of Patent: October 25, 1988
    Assignee: Oabrand PTY. Limited
    Inventors: Robert Lloyd, Maxwell J. Turner