Patents by Inventor William P. Hegarty

William P. Hegarty 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: 5392594
    Abstract: An oxygenated organic liquid product and a fuel gas are produced from a portion of synthesis gas comprising hydrogen, carbon monoxide, carbon dioxide, and sulfur-containing compounds in a integrated feed treatment and catalytic reaction system. To prevent catalyst poisoning, the sulfur-containing compounds in the reactor feed are absorbed in a liquid comprising the reactor product, and the resulting sulfur-containing liquid is regenerated by stripping with untreated synthesis gas from the reactor. Stripping offgas is combined with the remaining synthesis gas to provide a fuel gas product. A portion of the regenerated liquid is used as makeup to the absorber and the remainder is withdrawn as a liquid product. The method is particularly useful for integration with a combined cycle coal gasification system utilizing a gas turbine for electric power generation.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: February 28, 1995
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Robert B. Moore, William P. Hegarty, David W. Studer, Edward J. Tirados
  • Patent number: 5375580
    Abstract: A turbocharged or supercharged internal combustion motive system for utilization of gaseous fuel stored as a liquid wherein the liquefied gaseous fuel is vaporized and warmed at least partially with heat removed from the compressed intake combustion air in the turbocharger or supercharger aftercooler. In a preferred embodiment, the compressed intake combustion air is first cooled in an aftercooler against an ambiently cooled coolant and is subsequently cooled in further aftercooler heat exchange passages against an intermediate coolant which transfers heat removed from the compressed intake combustion air to the liquefied gaseous fuel.
    Type: Grant
    Filed: September 8, 1993
    Date of Patent: December 27, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Jack L. Stolz, William P. Hegarty, Anthony A. Cassano, James G. Hansel
  • Patent number: 5240476
    Abstract: A process for recovery of hydrogen sulfide-free fuel, while maintaining desirable carbon dioxide for combustion in a gas turbine to recover power in an integrated gasification combined cycle power plant and obtaining a rich hydrogen sulfide Claus plant feed gas is described.
    Type: Grant
    Filed: September 7, 1990
    Date of Patent: August 31, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: William P. Hegarty
  • Patent number: 5174866
    Abstract: A process is provided for extracting high purity oxygen from a gas generator turbine exhaust stream by passing the turbine exhaust over the feed side of solid electrolyte membrane selective to the permeation of oxygen over other components of the exhaust stream to separate the oxygen from the exhaust stream, and removing the oxygen product stream from the permeate side of the membrane. The reject exhaust stream is then passed through a power generating turbine to recover net power.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: December 29, 1992
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Michael S. Chen, William P. Hegarty, William A. Steyert, deceased, by Lila O. Steyer, executrix
  • Patent number: 5137550
    Abstract: The present invention relates to an improvement to a process for the removal of acid gases from a feed stream containing acid gases in which the feed gas is cooled and countercurrently contacted with a liquid absorbent in an absorber tower and the spent absorbent is regenerated by distillation wherein dissolved acid gases are stripped from the spent absorbent thereby producing a regenerated liquid absorbent and recycled to the absorber tower.
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: August 11, 1992
    Assignee: Air Products and Chemicals, Inc.
    Inventors: William P. Hegarty, Thomas C. Bono
  • Patent number: 5118395
    Abstract: A process is provided for extracting high purity oxygen from gas turbine exhaust streams by passing the gas turbine exhaust over the feed side of solid electrolyte membrane selective to the permeation of oxygen over other components of the exhaust stream to separate the oxygen from the exhaust stream, and removing the oxygen product stream from the permeate side of the membrane.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: June 2, 1992
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Michael S. Chen, William P. Hegarty, William A. Steyert, deceased
  • Patent number: 4957515
    Abstract: A process for recovery of hydrogen sulfide-free fuel, while maintaining desirable carbon dioxide for combustion in a gas turbine to recover power in an integrated coal gasification combined cycle power plant and obtaining a rich hydrogen sulfide Claus plant feed gas is described.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: September 18, 1990
    Assignee: Air Products and Chemicals, Inc.
    Inventor: William P. Hegarty
  • Patent number: 4826670
    Abstract: A process and system are set forth for improving an oxygen-enriched Claus process by introducing a sulfuric acid stream into the reaction furnace to moderate oxygen-induced high temperatures which allow oxygen-enrichment and attendant throughput in the Claus process to higher levels than heretobefore practiced.
    Type: Grant
    Filed: March 20, 1985
    Date of Patent: May 2, 1989
    Assignee: Air Products and Chemicals, Inc.
    Inventor: William P. Hegarty
  • Patent number: 4545787
    Abstract: A method is set forth for the generation of net power and the recovery of by-product oxygen-enriched gas at low power requirements. Air is compressed to elevated temperature and pressure, at least a portion of the air is combusted and a portion of the oxygen is removed from the air or combustion effluent through a membrane or adsorbent before the oxygen lean combustion effluent is expanded through a turbine to recover power for the process and net power.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: October 8, 1985
    Assignee: Air Products and Chemicals, Inc.
    Inventor: William P. Hegarty
  • Patent number: 4542114
    Abstract: A unique process arrangement is disclosed wherein the effluent flue gas from the removal of hydrocarbonaceous coke from particulate matter by combustion in a mixture of pure oxygen diluted with carbon dioxide is processed to provide a carbon dioxide-rich recycle gas stream to be mixed with oxygen as regenerator feed gas; and a net combustion product stream from which are recovered SO.sub.x and NO.sub.x to eliminate atmospheric emissions, and a pure CO.sub.2 product for export. An alternate embodiment also produces hydrogen or synthesis gas for export.
    Type: Grant
    Filed: April 13, 1984
    Date of Patent: September 17, 1985
    Assignee: Air Products and Chemicals, Inc.
    Inventor: William P. Hegarty
  • Patent number: 4475347
    Abstract: A process is described for the separation of an off-gas from a synthetic fuels production process, such as oil shale retorting, coal gasification, oxygen fireflooding or carbon dioxide miscible flood enhanced oil recovery, into an essentially sulfur-free, light fuel gas and a sulfur containing carbon dioxide gas. The off-gas is contacted with methanol to remove the sulfur containing gases and is then cooled to separate out a light fuel gas from a predominantly carbon dioxide gas. The carbon dioxide gas is again contacted with the same methanol to scrub the latter of sulfur-containing gas and reabsorb the sulfur onto the carbon dioxide gas. The carbon dioxide gas can then be recycled to the synthetic fuels production process with deposition of the sulfur therein or the gas can be delivered for export with downstream sulfur treatment.
    Type: Grant
    Filed: September 16, 1982
    Date of Patent: October 9, 1984
    Assignee: Air Products and Chemicals, Inc.
    Inventors: William P. Hegarty, William P. Schmidt
  • Patent number: 4449994
    Abstract: A process is disclosed for the separation of carbon dioxide and sulfide gases from oil shale retort off-gases, coal gasification off-gases, oxygen fire-flooding or carbon dioxide miscible flood enhanced oil recovery off-gases for recycle to a retort, gasifier or petroleum reservoir or alternately delivery to another process. The process separates the off-gases into an essentially sulfur-free fuel gas and an acid gas for recycle to such a retort, gasifier or reservoir wherein the off-gas is compressed if necessary and cooled to separate the two streams, the acid gas is expanded in an auto refrigeration step to provide the necessary process refrigeration and the acid gas is then recycled to such a retort, gasifier or reservoir. In the oil shale retorting and coal gasification applications, the gas' sulfur constituents are sorbed on spent oil shale particles or coal ash.
    Type: Grant
    Filed: January 15, 1982
    Date of Patent: May 22, 1984
    Assignee: Air Products and Chemicals, Inc.
    Inventors: William P. Hegarty, William P. Schmidt
  • Patent number: 4417449
    Abstract: A process is described for the separation of carbon dioxide and sulfide gases from oil shale retorting off-gases, coal gasification off-gases, oxygen fireflooding off-gases or carbon dioxide miscible flood enhanced oil recovery off-gases for recycle to a retort, gasifier, petroleum reservoir or to further sulfide processing prior to export. The process separates the off-gases into an essentially sulfur-free light BTU fuel gas, a heavy hydrocarbon stream and a carbon dioxide acid gas stream wherein the off-gas is compressed if necessary and cooled to separate the various streams. The carbon dioxide acid gas stream is expanded in an auto-refrigeration step to provide the necessary process refrigeration. In the oil shale retort and coal gasification applications the sulfur constituents are sorbed on spent oil shale particles or coal ash.
    Type: Grant
    Filed: January 15, 1982
    Date of Patent: November 29, 1983
    Assignee: Air Products and Chemicals, Inc.
    Inventors: William P. Hegarty, William P. Schmidt
  • Patent number: 4332598
    Abstract: This invention relates to a method for producing a hydrogen stream and a carbon dioxide stream from a mixed gas feedstock containing hydrogen, carbon dioxide, and contaminant sulfur compounds. The method comprises scrubbing the gas feedstock with a carbon dioxide laden solvent in an initial scrubbing zone under conditions such that not more than 70% of the carbonyl sulfide in the feedstock is removed in the initial zone, physically scrubbing the initially scrubbed feedstock with a solvent under conditions sufficient for removing substantially all the carbon dioxide and carbonyl sulfide therefrom to leave a pure hydrogen stream desorbing carbon dioxide and carbonyl sulfide and other gases from the liquid from the second scrubbing zone and then fractionating the resultant carbon dioxide stream containing hydrogen, carbon oxides, etc. to produce said carbon dioxide stream for use in urea synthesis.
    Type: Grant
    Filed: November 13, 1980
    Date of Patent: June 1, 1982
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Ioannis A. Antonas, Rodney J. Allam, William P. Hegarty
  • Patent number: 4254094
    Abstract: Process for treating synthesis gas to recover a purified essentially sulfur-free hydrogen-rich stream. The novel sequence of operations employed comprises initially removing from the feed gas, such as from a synthesis gas derived from partial oxidation of coal or oil, the bulk of contained H.sub.2 S and a substantial part of the contained COS, by physical absorption in a suitable solvent. The gas from the initial absorption is then subjected to water-gas shift reaction over a sulfur-resistant shift catalyst under conditions such that in addition to the conversion of CO to CO.sub.2 most of the contained COS hydrolyzed to H.sub.2 S. The gaseous shift product is then subjected to a second treatment with suitable solvent to remove by physical absorption essentially all of the remaining sulfur, which is then present as H.sub.2 S. The thus desulfurized gas mixture is then sent to a CO.sub.2 absorber, from which a H.sub.2 -rich gas effluent is withdrawn. The H.sub.
    Type: Grant
    Filed: March 19, 1979
    Date of Patent: March 3, 1981
    Assignee: Air Products and Chemicals, Inc.
    Inventor: William P. Hegarty
  • Patent number: 4242108
    Abstract: A novel method is disclosed for treating a contaminated gas such as a contaminated natural gas or a synthesis product gas from the partial oxidation of petroleum or coal to concentrate and remove hydrogen sulfide at a reduced energy and capital requirement. Hydrogen sulfide in the contaminated stream is absorbed to form a hydrogen sulfide rich solvent which includes co-absorbed carbon dioxide, which is then removed to prevent dilution of the concentrated hydrogen sulfide formed when the solvent is regenerated. The solvent leaving the hydrogen sulfide absorber is heated before entering a high pressure stripper column wherein the co-absorbed carbon dioxide is stripped from the solvent, preferably by stripping with nitrogen or a portion of the product gas, and the carbon dioxide is recycled to the hydrogen sulfide absorber. The CO.sub.
    Type: Grant
    Filed: November 7, 1979
    Date of Patent: December 30, 1980
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David M. Nicholas, William P. Hegarty