Patents by Inventor Brij Gupta

Brij Gupta 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).

  • Multi-stage hydrodesulfurization of cracked naphtha streams with interstage fractionation
    Patent number: 6913688
    Abstract: A process for the selective hydrodesulfurization of olefinic naphtha streams containing a substantial amount of organically bound sulfur and olefins. The olefinic naphtha stream is selectively hydrodesulfurized in a first sulfur removal stage and resulting product stream, which contains hydrogen sulfide and organosulfur is fractionated at a temperature to produce a light fraction containing less than about 100 wppm organically bound sulfur and a heavy fraction containing greater than about 100 wppm organically bound sulfur. The light fraction is stripped of at least a portion ofits hydrogen sulfide and can be collected or passed to gasoline blending. The heavy fraction is passed to a second sulfur removal stage wherein at least a portion of any remaining organically bound sulfur is removed.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: July 5, 2005
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: John C. Coker, Garland B. Brignac, Thomas R. Halbert, John G. Matragrano, Brij Gupta, Robert C. Welch, William E. Winter, Jr.
  • Staged hydrotreating method for naphtha desulfurization
    Patent number: 6596157
    Abstract: The invention relates to a method and dual reactor system for hydrotreating a wide cut cat naphtha stream comprising heavy cat naphtha (HCN) and intermediate cat naphtha (ICN). Accordingly, a HCN fraction is hydrotreated under non-selective hydrotreating conditions and an ICN fraction is hydrotreated under selective hydrotreating conditions. The hydrotreated HCN and ICN effluents may be conducted to heat exchangers to pre-heat the ICN feed, obviating the need for a furnace.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: July 22, 2003
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Brij Gupta, John P. Greeley, Thomas R. Halbert
  • Multi-stage hydrodesulfurization of cracked naphtha streams with interstage fractionation
    Publication number: 20030106839
    Abstract: A process for the selective hydrodesulfurization of olefinic naphtha streams containing a substantial amount of organically bound sulfur and olefins. The olefinic naphtha stream is selectively hydrodesulfurized in a first sulfur removal stage and resulting product stream, which contains hydrogen sulfide and organosulfur is fractionated at a temperature to produce a light fraction containing less than about 100 wppm organically bound sulfur and a heavy fraction containing greater than about 100 wppm organically bound sulfur. The light fraction is stripped of at least a portion ofits hydrogen sulfide and can be collected or passed to gasoline blending. The heavy fraction is passed to a second sulfur removal stage wherein at least a portion of any remaining organically bound sulfur is removed.
    Type: Application
    Filed: October 18, 2002
    Publication date: June 12, 2003
    Inventors: John C. Coker, Garland B. Brignac, Thomas R. Halbert, John G. Matragrano, Brij Gupta, Robert C. Welch, William E. Winter
  • Staged hydrotreating method for naphtha desulfurization
    Publication number: 20020005373
    Abstract: The invention relates to a method and dual reactor system for hydrotreating a wide cut cat naphtha stream comprising heavy cat naphtha (HCN) and intermediate cat naphtha (ICN). Accordingly, a HCN fraction is hydrotreated under non-selective hydrotreating conditions and an ICN fraction is hydrotreated under selective hydrotreating conditions. The hydrotreated HCN and ICN effluents may be conducted to heat exchangers to pre-heat the ICN feed, obviating the need for a furnace.
    Type: Application
    Filed: March 23, 2001
    Publication date: January 17, 2002
    Inventors: Brij Gupta, John P. Greeley, Thomas R. Halbert