Patents by Inventor Philip E. Grazier

Philip E. Grazier 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).

  • Integrated ammoniacal solvent extraction and hydrogen reduction of nickel
    Patent number: 7357827
    Abstract: A process is provided for the recovery of a metallic nickel product in a solvent extraction process which includes the steps of forming a nickel ammine complex by stripping nickel from a nickel loaded organic phase with a high strength ammonia solution and then reducing the nickel ammine complex with hydrogen from the high strength ammonia solution to produce a metallic nickel product. By virtue of the present process, a reductive precipitation of nickel by hydrogen is obtained so as to recover a metallic nickel product, and the process is advantageous in that it will allow for commercial processes wherein nickel may be recovered by hydrogen reduction based on high strength ammonia solutions.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: April 15, 2008
    Assignee: QNI Technology Pty. Ltd.
    Inventors: Eric Girvan Roche, Philip E. Grazier