Patents by Inventor Sameer S. Bharadwaj

Sameer S. Bharadwaj 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: 6846773
    Abstract: A process for the production of a mono-olefin from a gaseous paraffinic hydrocarbon having at least two carbon atoms or mixtures thereof comprising reacting said hydrocarbons and molecular oxygen in the presence of a platinum catalyst. The catalyst consists essentially of platinum modified with Sn or Cu and supported on a ceramic monolith.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: January 25, 2005
    Assignee: Regents of the University of Minnesota
    Inventors: Chikafumi Yokoyama, Sameer S. Bharadwaj, Lanny D. Schmidt
  • Publication number: 20030191020
    Abstract: A process and catalyst for the partial oxidation of paraffinic hydrocarbons, such as ethane, propane, naphtha, and natural gas condensates, to olefins, such as ethylene and propylene. The process involves contacting a paraffinic hydrocarbon with oxygen in the presence of hydrogen and a catalyst under autothermal process conditions. Preheating the feed decreases oxygen consumption and increases the net hydrogen balance. The catalyst comprises a Group 8B metal, preferably, a platinum group metal, and at least one promoter selected from Groups 1B, 6B, 3A, 4A, and 5A, optionally supported on a catalytic support, such as magnesia or alumina. In preferred embodiments, the support is pretreated with a support modifier selected from Groups 1A, 2A, 3B, 4B, 5B, 6B, 1B, 3A, 4A, 5A, the rare earth lanthanides, and the actinides. A modified fluidized bed reactor is disclosed for the process.
    Type: Application
    Filed: December 17, 2002
    Publication date: October 9, 2003
    Inventors: Sameer S. Bharadwaj, Jonathan H. Siddall, Joseph J. Maj, Mark D. Bearden, Craig B. Murchison, Gerald E. Lazaruk
  • Patent number: 6624116
    Abstract: An on-line method of synthesizing or regenerating catalysts for autothermal oxidation processes, specifically, the oxidation of paraffinic hydrocarbons, for example, ethane, propane, and naphtha, to olefins, for example, ethylene and propylene. The catalyst comprises a Group 8B metal, for example, a platinum group metal and, optionally, a promoter, such as tin, antimony, or copper, on a support, preferably a monolith support. On-line synthesis or regeneration involves co-feeding a volatile Group 8B metal compound and/or a volatile promoter compound with the paraffinic hydrocarbon and oxygen into the oxidation reactor under ignition or autothermal conditions.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: September 23, 2003
    Assignee: Dow Global Technologies Inc.
    Inventors: Sameer S. Bharadwaj, Joseph J. Maj, Jonathan H. Siddall
  • Patent number: 6566573
    Abstract: A process and catalyst for the partial oxidation of paraffinic hydrocarbons, such as ethane, propane, naphtha, and natural gas condensates, to olefins, such as ethylene and propylene. The process involves contacting a paraffinic hydrocarbon with oxygen in the presence of hydrogen and a catalyst under autothermal process conditions. Preheating the feed decreases oxygen consumption and increases the net hydrogen balance. The catalyst comprises a Group 8B metal, preferably, a platinum group metal, and at least one promoter selected from Groups 1B, 6B, 3A, 4A, and 5A, optionally supported on a catalytic support, such as magnesia or alumina. In preferred embodiments, the support is pretreated with a support modifier selected from Groups 1A, 2A, 3B, 4B, 5B, 6B, 1B, 3A, 4A, 5A, the rare earth lanthanides, and the actinides. A modified fluidized bed reactor is disclosed for the process.
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: May 20, 2003
    Assignee: Dow Global Technologies Inc.
    Inventors: Sameer S. Bharadwaj, Joseph J. Maj, Jonathan H. Siddall, Mark D. Bearden, Craig B. Murchison, Gerald E. Lazaruk
  • Patent number: 6548447
    Abstract: A process for the production of a mono-olefin from a gaseous paraffinic hydrocarbon having at least two carbon atoms or mixtures thereof comprising reacting the hydrocarbons and molecular oxygen in the presence of a platinum catalyst. The catalyst consists essentially of platinum modified with Sn or Cu and supported on a ceramic monolith.
    Type: Grant
    Filed: February 19, 1999
    Date of Patent: April 15, 2003
    Assignee: Regents of the University of Minnesota
    Inventors: Chikafumi Yokoyama, Sameer S. Bharadwaj, Lanny D. Schmidt
  • Patent number: 6166283
    Abstract: An on-line method of synthesizing or regenerating catalysts for autothermal oxidation processes, specifically, the oxidation of paraffinic hydrocarbons, for example, ethane, propane, and naphtha, to olefins, for example, ethylene and propylene. The catalyst comprises a Group 8B metal, for example, a platinum group metal and, optionally, a promoter, such as tin, antimony, or copper, on a support, preferably a monolith support. On-line synthesis or regeneration involves co-feeding a volatile Group 8B metal compound and/or a volatile promoter compound with the paraffinic hydrocarbon and oxygen into the oxidation reactor under ignition or autothermal conditions.
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: December 26, 2000
    Assignee: The Dow Chemical Company
    Inventors: Sameer S. Bharadwaj, Joseph J. Maj, Jonathan H. Siddall
  • Patent number: 6072097
    Abstract: A process for the production of a mono-olefin from a gaseous paraffinic hydrocarbon having at least two carbon atoms or mixtures thereof comprising reacting said hydrocarbons and molecular oxygen in the presence of a platinum catalyst. The catalyst consists essentially of platinum modified with Sn or Cu and supported on a ceramic monolith.
    Type: Grant
    Filed: September 3, 1998
    Date of Patent: June 6, 2000
    Assignee: Regents of the University of Minnesota
    Inventors: Chikafumi Yokoyama, Sameer S. Bharadwaj, Lanny D. Schmidt
  • Patent number: 5905180
    Abstract: A process for the production of a mono-olefin from a gaseous paraffinic hydrocarbon having at least two carbon atoms or mixtures thereof comprising reacting said hydrocarbons and molecular oxygen in the presence of a platinum catalyst. The catalyst consists essentially of platinum modified with Sn or Cu and supported on a ceramic monolith.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: May 18, 1999
    Assignee: Regents of the University of Minnesota
    Inventors: Chikafumi Yokoyama, Sameer S. Bharadwaj, Lanny D. Schmidt
  • Patent number: 5639929
    Abstract: A process for the oxidative dehydrogenation of hydrocarbons is disclosed in which C.sub.2 -C.sub.6 alkanes are contacted with an oxygen containing gas in a fluidized catalyst bed of platinum, rhodium, nickel or platinum-gold supported on .alpha.-alumina or zirconia. Ethane is dehydrogenated to ethylene and higher alkanes are dehydrogenated to ethylene, propylene and iso-butylene.
    Type: Grant
    Filed: April 17, 1995
    Date of Patent: June 17, 1997
    Assignee: Regents of the University of Minnesota
    Inventors: Sameer S. Bharadwaj, Lanny D. Schmidt