Generally Concurrent Flow Of Oxygen Containing Gas And Material Patents (Class 502/46)
  • Patent number: 8293670
    Abstract: A process for catalyst regeneration is presented. The process regenerates a catalyst in a paraffin dehydrogenation process, where the reaction is endothermic. The regeneration process provides the heat for the process through heating the catalyst and removes the need for a charge heater to the dehydrogenation reactor, which in turn eliminates high temperature thermal residence time which eliminates thermal cracking of the feed and improves the overall product selectivity. In addition, plot area, equipment costs and operating complexity are reduced.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: October 23, 2012
    Assignee: UOP LLC
    Inventors: David N. Myers, Daniel N. Myers
  • Patent number: 8262753
    Abstract: An apparatus suitable for generating gaseous hydrocarbon fuel from a carbon based synthesis gas including a reaction chamber having a rotating shaft including a plurality of radial blades mixing and circulating carbon based synthesis gas and particulate catalyst upwardly generating gaseous hydrocarbon fuel, a stripping chamber located above the reaction chamber having a second axial rotating shaft including a plurality of radial blades driving hydrocarbon fuel radially outwardly, a source of hot stripping gas, an annular filter surrounding the stripping chamber and an annular gas collection chamber surrounding the filter. The blades in the stripping chamber are rotated independently at a greater velocity than the blades in the reaction chamber and the reaction is controlled by the temperature of the synthesis gas and the rotational velocity of the mixing blades in the reaction chamber.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: September 11, 2012
    Inventor: Bayne Carew
  • Patent number: 8173567
    Abstract: Disclosed is a catalyst distributor and process for spreading catalyst over a regenerator vessel. Nozzles disposed angular to a header of the distributor spread catalyst throughout a full cross section of the catalyst bed.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: May 8, 2012
    Assignee: UOP LLC
    Inventors: Paolo Palmas, Lawrence A. Lacijan, Sujay R. Krishnamurthy, Mohammad-Reza Mostofi-Ashtiani, Paul S. Nishimura, Lisa M. Wolschlag
  • Patent number: 8088705
    Abstract: The invention relates to a process for incorporating sulfur in the porosity of the solid particles of a catalyst for the conversion of hydrocarbons or an adsorbent. This process is carried out off-site in the presence of hydrogen sulfide that is pure or diluted in hydrogen or nitrogen, a process in which said particles are made to rise or fall in a sulfur incorporation zone that comprises at least one vibratory helical coil that is essentially tubular in shape and that comprises at least two turns, whereby said particles are subjected to a temperature profile over the majority of their path in said coil and whereby said particles are brought into contact with at least one fluid on at least one portion of their path.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: January 3, 2012
    Assignee: IFP Energies Nouvelles
    Inventors: Pierre Dufresne, Franck Labruyere, Maxime Meens, Loredana Romano
  • Patent number: 7816294
    Abstract: A catalyst regenerator (100) has a first section (110) and a second section (120) and is operated such that carbon from a carbon-contaminated catalyst (140) is converted to carbon monoxide in the first section (110) and that carbon monoxide is converted to carbon dioxide in the second section (120). The residence time of the oxygen-containing gas in the first and second sections (110, 120) is regulated in preferred configurations by the shape (e.g., diameter) of the first and second sections (110, 120).
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: October 19, 2010
    Assignee: Fluor Technologies Corporation
    Inventor: Humbert Chu
  • Patent number: 7799287
    Abstract: Disclosed is an apparatus and process for disengaging regenerated catalyst from flue gas in a catalyst regenerator so as to avoid re-entrainment of catalyst that has settled into a bed in the catalyst regenerator using a disengaging device. A disengaging arm of the disengaging device has an outer shell that encloses the arm, an inner shell with a slot for allowing catalyst and flue gas to exit the arm and an outer baffle having a lower edge located below the opening in the outer wall. The baffle directs the catalyst and flue gas downwardly and limits radial flow. Catalyst and flue gas enter the disengaging arm through an opening in an outer wall of a riser section at a first superficial velocity and exits through a slot in a bottom of the disengaging arm at no more than 1.33 the first superficial velocity.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: September 21, 2010
    Assignee: UOP LLC
    Inventors: Brian W. Hedrick, Robert L. Mehlberg, Daniel R. Johnson, Mohammad Reza Mostofi Ashtiani
  • Patent number: 7470644
    Abstract: The invention pertains to a process for combusting coke of a coke-containing FCC catalyst in a regeneration unit of a FCC unit having the introduction of oxygen-containing gas through a gas-transport unit into the regeneration unit and combusting the coke by means of an oxygen-containing gas, in which the oxygen-containing gas is cooled in a cooling unit before it is brought in contact with the coke-containing FCC catalyst. The invention further relates to an apparatus for performing said process.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: December 30, 2008
    Assignee: Shell Oil Company
    Inventors: Jacobus Mathias Hendrikus Dirkx, Richard Joseph Higgins, Rene Samson
  • Patent number: 7291311
    Abstract: Process for controlling the combustion zone of a fluidized bed process comprising a regeneration zone and a reaction zone, the catalyst circulating between these two zones, and the regeneration zone comprising a combustion stage of the coke deposited on the catalyst in the reaction zone, control of the combustion zone being performed on the basis of a characteristic variable of the operation of said combustion zone, said characteristic variable being the object of automatic regulation by acting on the catalyst throughput, characterized in that the value of the catalyst throughput or of any control variable connected unequivocally to the catalyst is determined based on information on the operating values of the combustion zone, at least one of which corresponds to an independent evaluation of the level of coke deposited on the catalyst.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: November 6, 2007
    Assignee: Institut Francais du Petrole
    Inventor: Eric Sanchez
  • Patent number: 6558531
    Abstract: The invention relates to a process for maintaining heat balance in a fluidized bed catalytic cracking unit. More specifically, the invention relates to a combustion control method capable of maintaining or restoring heat balance by conducting, under appropriate conditions, fuel and an oxygen-containing gas to a transfer line. The transfer line conducts effluent including spent catalyst and combustion products to the unit's catalyst regeneration zone.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: May 6, 2003
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Todd R. Steffens, Paul K. Ladwig, George Melfi, John E. Asplin
  • Patent number: 6239055
    Abstract: The invention concerns a process for regenerating a catalyst in a fixed or moving bed, for example a catalyst for reforming or for aromatic compound production, including a step for monitoring and controlling combustion completion which is carried out after the catalyst has undergone all of the combustion steps of the process. The monitoring and control step is carried out by injecting an oxygen-containing gas into the zone where monitoring and control takes place, the monitoring and control step being carried out under conditions which are more severe than those in the combustion steps. The monitoring and control step is carried out with an oxygen consumption of less than 10%. The temperature advantageously remains substantially constant. The vessel for carrying out the invention is also claimed.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: May 29, 2001
    Assignee: Institut Francais du Petrole
    Inventors: Fran├žois-Xavier Brunet, Emmanuelle Bromet, Jean-Marie Deves, Dominique Humeau, Eric Sanchez
  • Patent number: 6133183
    Abstract: The invention concerns a process for regenerating a catalyst for the production of aromatic compounds, in particular for reforming, comprising combustion (A), oxychlorination (B) and calcining (C) steps, in which at least one chlorinating agent (conduit 19), at least one oxygen-containing gas (conduit 18), and water (conduit 20) are introduced into the oxychlorination step such that the H.sub.2 O/HCl molar ratio is 3 to 50, the oxychlorination step being carried out in the presence of an oxychlorination gas containing less than 21% of oxygen and at least 50 ppm by weight of chlorine (based on HCl), and at a temperature of 350-600.degree. C.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: October 17, 2000
    Assignee: Institut Francais du Petrole
    Inventors: Marianne Capelle, Jean-Marie Deves, Frede ricfmann, Michel Thery
  • Patent number: 6114265
    Abstract: Disclosed is a process for controlling combustion in a fluid catalytic cracking regenerator. More specifically, afterburning which occurs during the combustion process is controlled by adjusting oxygen concentration in at least one of two combustion streams which is injected into a fluid catalytic cracking regenerator. Preferably, the combustion streams used in the invention are asymmetrically injected into a dense phase catalyst bed within the regenerator.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: September 5, 2000
    Assignee: Exxon Research and Engineering Company
    Inventors: Todd R. Steffens, Paul K. Ladwig
  • Patent number: 6103652
    Abstract: The invention concerns a process for moving bed regeneration of a reforming or aromatic hydrocarbon production catalyst. The catalyst includes a support, at least one noble metal and at least one halogen. The process includes a combustion step in which the catalyst is treated in at least two successive combustion zones. Also, the process includes each combustion zone separated from adjacent combustion zones allowing catalyst to pass and preventing passage of gas, at least one oxygen-containing gas introduced into each zone and produced gases extracted from each zone, and the severity of the operating conditions in each zone increasing in the direction of catalyst flow. Advantageously, the combustion step ends in a zone for monitoring and controlling combustion completion characterized by a low or zero oxygen consumption.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: August 15, 2000
    Assignee: Institut Francois du Petrole
    Inventors: Fran.cedilla.ois-Xavier Brunet, Emmanuelle Bromet, Jean-Marie Deves
  • Patent number: 6048814
    Abstract: The invention concerns a process and unit for regenerating a catalyst for the production of aromatic compounds, in particular for reforming, the catalyst being in a moving bed, comprising combustion, oxychlorination and calcining steps, in which at least one chlorinating agent, at least one oxygen-containing gas, and water are introduced into the oxychlorination step such that the H.sub.2 O/HCl molar ratio is 1 to 50, the oxychlorination step being carried out in the presence of an oxychlorination gas containing less than 21% of oxygen and at least 50 ppm by weight of chlorine (based on HCl), and at a temperature of 350-600.degree. C., and in which the combustion step is carried out in at least two combustion zones, each zone being separated from the adjacent zones, and at least one gas charged with oxygen is introduced into each zone, the gases produced being extracted from each zone, and in which the severity of the operating conditions increases in the direction of flow of the catalyst.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: April 11, 2000
    Assignee: Institut Francais du Petrole
    Inventors: Marianne Capelle, Jean-Marie Deves, Frederic Hoffmann, Michel Thery, Fran.cedilla.ois-Xavier Brunet, Emmanuelle Bromet
  • Patent number: 5401475
    Abstract: A process and apparatus for generating elemental sulfur and re-usable metal oxide from spent metal-sulfur compound. Spent metal-sulfur compound is regenerated to re-usable metal oxide by moving a bed of spent metal-sulfur compound progressively through a single regeneration vessel having a first and second regeneration stage and a third cooling and purging stage. The regeneration is carried out and elemental sulfur is generated in the first stage by introducing a first gas of sulfur dioxide which contains oxygen at a concentration less than the stoichiometric amount required for complete oxidation of the spent metal-sulfur compound. A second gas containing sulfur dioxide and excess oxygen at a concentration sufficient for complete oxidation of the partially spent metal-sulfur compound, is introduced into the second regeneration stage. Gaseous sulfur formed in the first regeneration stage is removed prior to introducing the second gas into the second regeneration stage.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: March 28, 1995
    Assignee: G.E. Environmental Services, Inc.
    Inventors: Raul E. Ayala, Eli Gal
  • Patent number: 4973780
    Abstract: An improved process for the alkylation of benzene in the presence of an alkylation catalyst. The catalyst bed may be caused to move in a direction countercurrent to the movement of the benzene and olefin, or a portion of the catalyst bed is periodically removed and replaced. A regeneration step, whereby the catalyst is heated in a controlled oxygen atmosphere in order to reactivate the catalyst, is also described.
    Type: Grant
    Filed: April 27, 1988
    Date of Patent: November 27, 1990
    Assignee: Lummus Crest, Inc.
    Inventors: Roger C. Johnson, Daniel McCarthy, Andrei Rhoe
  • Patent number: 4621069
    Abstract: Used catalyst containing carbon and sulfur deposits is continuously regenerated by staged burnoff of the carbon and sulfur using a multiple zone treatment vessel containing thin beds of catalyst. The catalyst is exposed to successively increased temperatures and oxygen concentrations to effectively remove substantially all the carbon and sulfur deposits. The used catalyst can be that removed from hydroconversion processes, such as from H-Oil, H-Coal and fluid catalystic cracking processes, and processed in a multizone treatment vessel in combination with proper auxiliary heating equipment for continuous step-wise regeneration of the catalyst. Operating conditions of catalyst temperature, oxygen concentration of gas, and catalyst residence time in each stage of the catalyst regeneration process are carefully controlled to provide staged burnoff of carbon and sulfur deposits for superior regenerated catalyst results.
    Type: Grant
    Filed: October 3, 1983
    Date of Patent: November 4, 1986
    Assignee: HRI, Inc.
    Inventor: Partha S. Ganguli
  • Patent number: 4473658
    Abstract: An improved moving bed continuous catalytic cracking process for cracking hydrocarbon feedstocks, such as gas oil, in the absence of added hydrogen, which includes the use of a minute amount of dispersed platinum supported directly on a cracking catalyst. The trace of platinum induces a substantial increase in the heat efficiency with which coke on catalyst is converted to CO.sub.2 in the regenerator section with minimal or no detriment to the cracking reaction.
    Type: Grant
    Filed: August 17, 1983
    Date of Patent: September 25, 1984
    Assignee: Mobil Oil Corporation
    Inventor: Albert B. Schwartz
  • Patent number: RE32239
    Abstract: An improved moving bed continuous catalytic cracking process for cracking hydrocarbon feedstocks, such as gas oil, in the absence of added hydrogen, which includes the use of a minute amount of dispersed platinum supported directly on a cracking catalyst. The trace of platinum induces a substantial increase in the heat efficiency with which coke on catalyst is converted to CO.sub.2 in the regenerator section with minimal or no detriment to the cracking reaction.
    Type: Grant
    Filed: May 24, 1985
    Date of Patent: September 2, 1986
    Assignee: Mobil Oil Corporation
    Inventor: Albert B. Schwartz