Patents by Inventor Paul SKAYMAN

Paul SKAYMAN 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: 11155894
    Abstract: A process for reducing arsenic content from arsenic-bearing gold concentrate or other arsenic-bearing gold materials to produce a low arsenic-bearing gold concentrate. The process may comprise adding oxygen, water, and/or acid to an acidulated arsenic-bearing gold concentrate slurry and reacting them together in an autoclave at an elevated pressure and temperature in a pressure oxidation step. In one or more examples, the process may further comprise processing the oxidized concentrate slurry in an arsenic re-dissolution step to dissolve unstable solid arsenic compounds, and applying a first solid/liquid separation and wash step to form a first washed slurry/solid and first acid-containing solutions. The process may further comprise reacting the first washed slurry/solid with sulfur dioxide in a reductive leach step, and applying a second solid/liquid separation and wash step to form a second washed slurry/solid and second acid-containing solutions.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: October 26, 2021
    Assignee: Eldorado Gold Corporation
    Inventors: Roman Berezowsky, Paul Skayman, Jinxing Ji
  • Publication number: 20180265947
    Abstract: A process for recovering silver from silver-bearing gold concentrate or other silver-bearing material which may comprise adding oxygen, water, and/or acid to an acidulated concentrate slurry of an input silver bearing material and reacting them together in an autoclave at an elevated pressure and temperature in a pressure oxidation step; processing the oxidized concentrate slurry in a post pressure oxidation conditioning step; applying a first solid/liquid separation and wash step and a filter and wash step to form a first washed slurry/solid and first acid-containing solutions; reacting the first washed slurry/solid with sulfur dioxide in a reductive leach step; applying a second solid/liquid separation and wash step to form a second washed slurry/solid and second acid-containing solutions; and applying an optional surface cleaning step, to produce a free-milling silver-bearing material, which is amenable to conventional cyanidation to recover the silver therefrom.
    Type: Application
    Filed: April 28, 2016
    Publication date: September 20, 2018
    Inventors: Roman BEREZOWSKY, Paul SKAYMAN, Jinxing JI
  • Publication number: 20180258510
    Abstract: A process for reducing arsenic content from arsenic-bearing gold concentrate or other arsenic-bearing gold materials to produce the low arsenic-bearing gold concentrate.
    Type: Application
    Filed: April 28, 2016
    Publication date: September 13, 2018
    Inventors: Roman BEREZOWSKY, Paul SKAYMAN, Jinxing JI