Patents by Inventor John J. Senetar

John J. Senetar 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: 6459009
    Abstract: The invention is a process for recovering heat and removing impurities from a reactor effluent stream withdrawn from a fluidized exothermic reaction zone for conversion of oxygenates into light olefins from an oxygenate feedstream. The process comprises a two-stage quench tower system to remove water from the reactor effluent stream in the first tower and recover heat from the reactor effluent to at least partially vaporize the feedstream by indirect heat exchange between the oxygenate feedstream and either a first stage overhead stream or a first stage pumparound stream. A drag stream withdrawn from the first tower comprises the majority of the impurities and higher boiling oxygenates. The second stage tower further removes water and provides a purified water stream which requires minimal water stripping to produce a high purity water stream. The invention concentrates the impurities into a relatively small stream and results in significant energy and capital savings.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: October 1, 2002
    Assignee: UOP LLC
    Inventors: Lawrence W. Miller, John J. Senetar
  • Patent number: 6444869
    Abstract: A process is provided for the concentration and recovery of ethylene and heavier components from an oxygenate conversion process. A separation process such as a pressure swing adsorption (PSA) process is used to remove hydrogen and methane from a demethanizer overhead stream comprising hydrogen, methane and C2 hydrocarbons and subsequently return the recovered C2 hydrocarbons to be admixed with the effluent from the oxygenate conversion process. This integration of a separation zone with a fractionation scheme in an ethylene recovery scheme using an initial demethanizer zone resulted in significant capital and operating cost savings by the elimination of cryogenic ethylene-based refrigeration from the overall recovery scheme.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: September 3, 2002
    Assignee: UOP LLC
    Inventors: John J. Senetar, Lawrence W. Miller, Linda Shi Cheng, Mark M. Davis
  • Patent number: 6403854
    Abstract: The present invention relates to a process for the recovering heat and removing impurities from a reactor effluent stream withdrawn from a fluidized exothermic reaction zone for the conversion of oxygenates into light olefins from an oxygenate feedstream. The process comprises a novel two-stage quench tower system to remove water from the reactor effluent stream in the first tower and recover heat from the reactor effluent to at least partially vaporize the feedstream by indirect heat exchange between the oxygenate feedstream and either a first stage overhead stream or a first stage pumparound stream. A drag stream withdrawn from the first tower comprises the majority of the impurities and any higher boiling oxygenates. The second stage tower further removes water from the light olefin product stream and provides a purified water stream which requires only minimal water stripping to produce a high purity water stream.
    Type: Grant
    Filed: October 19, 2000
    Date of Patent: June 11, 2002
    Assignee: UOP LLC
    Inventors: Lawrence W. Miller, John J. Senetar
  • Patent number: 6342197
    Abstract: The present invention relates to an improvement of integrated fuel processor and fuel cell systems which improves stability of operation, simplifies control, and improves the heat recovery. According to the invention, a reforming zone is heated by indirect heat exchange with a first combustion effluent stream and provides a cooled first combustion effluent stream. The cooled combustion effluent stream is reheated in at least an additional combustion zone with at least a portion of the anode waste gas from the fuel cell to provide a reheated combustion effluent stream. The reheated combustion effluent stream is employed to further heat the reforming zone.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: January 29, 2002
    Assignee: UOP LLC
    Inventors: John J. Senetar, Gavin P. Towler, John R. Harness
  • Publication number: 20020007101
    Abstract: A process is provided for the concentration and recovery of ethylene and heavier components from an oxygenate conversion process. A separation process such as a pressure swing adsorption (PSA) process is used to remove hydrogen and methane from a demethanizer overhead stream comprising hydrogen, methane and C2 hydrocarbons and subsequently return the recovered C2 hydrocarbons to be admixed with the effluent from the oxygenate conversion process. This integration of a separation zone with a fractionation scheme in an ethylene recovery scheme using an initial deethanizer zone resulted in significant capital and operating cost savings by the elimination of cryogenic ethylene-based refrigeration from the overall recovery scheme.
    Type: Application
    Filed: July 19, 2001
    Publication date: January 17, 2002
    Inventors: John J. Senetar, Lawrence W. Miller, Linda S. Cheng, Mark M. Davis
  • Patent number: 6303841
    Abstract: A process is provided for the concentration and recovery of ethylene and heavier components from an oxygenate conversion process. A separation process such as a pressure swing adsorption (PSA) process is used to remove hydrogen and methane from a demethanizer overhead stream comprising hydrogen, methane, and C2 hydrocarbons and subsequently return the recovered C2 hydrocarbons to be admixed with the effluent from the oxygenate conversion process. This integration of a separation zone with a fractionation scheme in an ethylene recovery scheme using an initial demethanizer zone resulted in significant capital and operating cost savings by the elimination of cryogenic ethylene-based refrigeration from the overall recovery scheme.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: October 16, 2001
    Assignee: UOP LLC
    Inventors: John J. Senetar, Lawrence W. Miller, Linda Shi Cheng, Mark M. Davis
  • Patent number: 6299994
    Abstract: Hydrogen generation and fuel cell operation are integrated through the use of a low-cost hydrogen generation zone which comprises a pre-reforming zone, a partial oxidation zone, a reforming zone, and a water gas shift zone. Anode waste gas from the fuel cell is burned to provide heat to pre-reform the feed to the hydrogen generation zone while the burner exit temperature and the reforming zone exit temperatures are controlled to eliminate thermal cycling in the hydrogenation zone. This simplified control of the hot side temperatures in the hydrogen generation zone below about 700° C. combined with use of the pre-reforming zone, surprisingly permits the use of carbon steel and/or stainless steel for construction of the hydrogenation zone while providing an efficient system which does not require external fuel and offers a high degree of feedstock flexibility at low cost.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: October 9, 2001
    Assignee: UOP LLC
    Inventors: Gavin P. Towler, Kishore J. Doshi, Kurt M. Vanden Bussche, John J. Senetar
  • Patent number: 6280864
    Abstract: Hydrogen generation and fuel cell operation are integrated through the use of a low-cost hydrogen generation zone which comprises a pre-reforming zone, a partial oxidation zone, a reforming zone, and a water gas shift zone. Anode waste gas from the fuel cell is burned to provide heat to pre-reform the feed to the hydrogen generation zone while the burner exit temperature and the reforming zone exit temperatures are controlled using a simplified control system to eliminate thermal cycling in the hydrogenation zone. This simplified control of the hot side temperatures in the hydrogen generation zone below about 700° C. combined with use of the pre-reforming zone, surprisingly permits the use of carbon steel and/or stainless steel for construction of the hydrogenation zone while providing an efficient system which does not require external fuel and offers a high degree of feedstock flexibility at low cost.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: August 28, 2001
    Assignee: UOP LLC
    Inventors: Gavin P. Towler, Kishore J. Doshi, Kurt M. Vanden Bussche, John J. Senetar
  • Patent number: 6190623
    Abstract: An apparatus is provided which comprises two burner zones using a single igniter separated by a heat transfer zone for use in low-cost hydrogen generation units. When used in conjunction with a control system which limits the effluent temperature to less than about 700° C., the apparatus can be constructed of materials such as carbon steel and stainless steel rather than more exotic materials. This simplified structure and the use of less exotic materials provides an efficient, low-cost combined partial oxidation reactor for small-scale hydrogen production systems, especially for hydrogen production systems associated with fuel cell operation for the production of electricity.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: February 20, 2001
    Assignee: UOP LLC
    Inventors: Robert J. Sanger, Gavin P. Towler, Kishore J. Doshi, Kurt M. Vanden Bussche, John J. Senetar
  • Patent number: 5518828
    Abstract: The invention provides a molten carbonate fuel cell system having a plurality of fuel cell stacks, with each fuel cell stack having an anode and a cathode. Each of the anodes includes an anode feed inlet and an anode exhaust outlet, and each cathode includes a cathode feed inlet and a cathode exhaust outlet. A combuster for receiving unreacted fuel from the anode exhaust outlet of a first one of the fuel cell stacks is connected to the cathode feed inlet of a second one of the fuel cell stacks for delivering exhaust from the combuster. An intercooler is disposed between the cathode exhaust outlet of the second fuel cell stack and the cathode feed inlet of the first fuel cell stack for cooling gases passing therebetween.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: May 21, 1996
    Assignee: Bechtel Group, Inc.
    Inventor: John J. Senetar