Patents Assigned to Trochem (PTY) Limited
  • Ore dressing process
    Patent number: 4274951
    Abstract: A process of dressing mineral ores in order to improve the quality of the float in the flotation of certain minerals, particularly apatite ores. The process involves adding to a mineral ore pulp a gangue depressant material comprising certain guar gum ethers whereby an improved separation of calcite and other gangue minerals from the mineral values, particularly phosphate values, is obtained.
    Type: Grant
    Filed: December 14, 1978
    Date of Patent: June 23, 1981
    Assignee: Trochem (PTY) Limited
    Inventor: Lionel A. Goold