Patents Assigned to Cluff Mining
  • Process for the enhanced production of silver from gold and silver bearing ore
    Patent number: 5034055
    Abstract: There is disclosed a process for recovering gold and silver values from ore using activated carbon for adsorbing the values, wherein the activated carbon is treated with a suitable oxidant having an oxidation potential higher than that of oxygen. A preferred oxidant is potassium permanganate. Activated carbon so treated has an enhanced affinity for adsorbing silver, even under conditions which traditionally have favored loading of carbon with gold.
    Type: Grant
    Filed: July 25, 1990
    Date of Patent: July 23, 1991
    Assignee: Cluff Mining
    Inventor: John W. Rowson