Patents by Inventor Louis Joseph Nordrum

Louis Joseph Nordrum 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: 9809870
    Abstract: A process for treating spent catalyst containing heavy metals, e.g., Group VIB metals and Group VIII metals is provided. In one embodiment after deoiling, the spent catalyst is treated with an ammonia leach solution under conditions sufficient to dissolve the group VIB metal and the Group VIII metal into the leaching solution, forming a leach slurry. After solid-liquid separation to recover a leach solution, chemical precipitation and solids repulping is carried out to obtain an effluent stream containing ammonium sulfate (Amsul), ammonium sulfamate, Group VB, Group VIB and Group VIII metals. Following sulfidation, the Group VIII metal is fully removed and Group VB and Group VI metals are partially removed from the Amsul stream.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: November 7, 2017
    Assignee: Chevron U.S.A. Inc.
    Inventors: Rahul Shankar Bhaduri, Louis Joseph Nordrum, Alexander E. Kuperman
  • Publication number: 20140348729
    Abstract: A process for treating spent catalyst containing heavy metals, e.g., Group VIB metals and Group VIII metals is provided. In one embodiment after deoiling, the spent catalyst is treated with an ammonia leach solution under conditions sufficient to dissolve the group VIB metal and the Group VIII metal into the leaching solution, forming a leach slurry. After solid-liquid separation to recover a leach solution, chemical precipitation and solids repulping is carried out to obtain an effluent stream containing ammonium sulfate (Amsul), ammonium sulfamate, Group VB, Group VIB and Group VIII metals. Following sulfidation, the Group VIII metal is fully removed and Group VB and Group VI metals are partially removed from the Amsul stream.
    Type: Application
    Filed: August 6, 2014
    Publication date: November 27, 2014
    Applicant: CHEVRON U.S.A. INC.
    Inventors: Rahul Shankar BHADURI, Louis Joseph NORDRUM, Alexander E. KUPERMAN
  • Patent number: 8815184
    Abstract: A process for treating spent catalyst containing heavy metals, e.g., Group VIB metals and Group VIII metals is provided. In one embodiment after deoiling, the spent catalyst is treated with an ammonia leach solution under conditions sufficient to dissolve the group VIB metal and the Group VIII metal into the leaching solution, forming a leach slurry. After solid-liquid separation to recover a leach solution, chemical precipitation and solids repulping is carried out to obtain an effluent stream containing ammonium sulfate (Amsul), ammonium sulfamate, Group VB, Group VIB and Group VIII metals. Following sulfidation, the Group VIII metal is fully removed and Group VB and Group VI metals are partially removed from the Amsul stream.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: August 26, 2014
    Assignee: Chevron U.S.A. Inc.
    Inventors: Rahul Shankar Bhaduri, Louis Joseph Nordrum, Alexander E Kuperman
  • Publication number: 20120039777
    Abstract: A process for treating spent catalyst containing heavy metals, e.g., Group VIB metals and Group VIII metals is provided. In one embodiment after deoiling, the spent catalyst is treated with an ammonia leach solution under conditions sufficient to dissolve the group VIB metal and the Group VIII metal into the leaching solution, forming a leach slurry. After solid-liquid separation to recover a leach solution, chemical precipitation and solids repulping is carried out to obtain an effluent stream containing ammonium sulfate (Amsul), ammonium sulfamate, Group VB, Group VIB and Group VIII metals. Following sulfidation, the Group VIII metal is fully removed and Group VB and Group VI metals are partially removed from the Amsul stream.
    Type: Application
    Filed: June 9, 2011
    Publication date: February 16, 2012
    Applicant: c/o Chevron Corporation
    Inventors: Rahul Shankar Bhaduri, Louis Joseph Nordrum, Alexander E. Kuperman