Patents by Inventor Cuong V. Luong

Cuong V. Luong 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).

  • Process for the extraction and separation of nickel and/or cobalt
    Patent number: 5447552
    Abstract: The invention provides a hydrometallurgical process for the recovery of metals. In particular, an aqueous feed solution originating from acid leaching is provided. The aqueous feed solution contains nickel and/or cobalt ions. The pH of the solution is maintained at a level between about 2 and 6. The aqueous feed solution is contacted with a water-immiscible organic phase containing an extractant to load the nickel and/or cobalt metal ions to form a metal-bearing organic phase. The extractant has at least one organic soluble dithiophosphinic acid, alkali, alkaline earth metal or ammonium salt thereof. The aqueous feed solution has sufficiently low levels of chromium (VI) ions, iron (III) ions and copper ions to allow repeated use of the extractant. The metal-bearing organic phase is then separated from the metal-containing aqueous feed solution.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: September 5, 1995
    Assignee: Goro Nickel S.A.
    Inventors: Indje O. Mihaylov, Eberhard Krause, Steve W. Laundry, Cuong V. Luong
  • Process for the extraction and separation of nickel and/or cobalt
    Patent number: 5378262
    Abstract: The invention provides a hydrometallurgical process for the recovery of metals. In particular, an aqueous feed solution derived from acid leaching is provided. The aqueous feed solution contains nickel and/or cobalt ions. The pH of the solution is maintained at a level between about 2 and 6. The aqueous feed solution is contacted with a water-immiscible organic phase containing an extractant to load the nickel and/or cobalt metal ions to form a metal-bearing organic phase. The extractant has at least one organic soluble dithiophosphinic acid, alkali, alkaline earth metal or ammonium salt thereof. The aqueous feed solution has sufficiently low levels of chromium (VI) ions and copper ions to allow repeated use of the extractant. The metal-bearing organic phase is then separated from the metal-containing aqueous feed solution.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: January 3, 1995
    Assignee: Inco Limited
    Inventors: Indje O. Mihaylov, Eberhard Krause, Steve W. Laundry, Cuong V. Luong
  • Process for treatment of contaminated waste water or groundwater
    Patent number: 5124051
    Abstract: A process is provided for treating aqueous waste or groundwater contaminated with nitro-containing organic chemicals to degrade the compound sufficiently to permit disposal of the waste or groundwater.
    Type: Grant
    Filed: November 29, 1990
    Date of Patent: June 23, 1992
    Assignee: Solarchem Enterprises Inc.
    Inventors: Keith G. Bircher, Cuong V. Luong