Patents by Inventor Alex T. Wilson

Alex T. Wilson 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).

  • Patent number: 4551213
    Abstract: Gold values are recovered from mixtures thereof contained with sulfur, especially mixtures obtained from the hydrometallurgical processing of copper. The process comprises the following steps:(a) forming an aqueous suspension of the mixture containing the gold and sulfur values;(b) adjusting the chloride concentration of the suspension so that the suspension contains at least about 12 weight percent of chloride;(c) maintaining the oxidation reduction potential of the mixture in the range of about 650-750 millivolts;(d) adding cupric chloride or ferric chloride, if not already present in the mixture, in sufficient amounts to cause the gold contained in the mixture to dissolve into the solution; and(e) recovering the gold from the solution in an electrolytic cell, or by reaction with carbon.
    Type: Grant
    Filed: May 7, 1984
    Date of Patent: November 5, 1985
    Assignee: Duval Corporation
    Inventor: Alex T. Wilson