Patents by Inventor Ralph S. Mikida

Ralph S. Mikida 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).

  • Method for treating tailing slurries with Caro's acid
    Patent number: 6090297
    Abstract: A process for treating precious metal tailing slurries with Caro's acid, in which the Caro's acid is accompanied by reduced amounts of Caro's acid mist, is disclosed. The hot Caro's acid-containing mixture, formed by reaction of concentrated sulfuric acid and hydrogen peroxide, is quenched with water to reduce or eliminate the Caro's acid mist. The resulting cooled and diluted mixture is introduced into a precious metal tailings slurry to reduce the amount of cyanide values in the slurry.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: July 18, 2000
    Assignee: FMC Corporation
    Inventors: Harry M. Castrantas, James L. Manganaro, Ralph S. Mikida, William Johnson