Patents by Inventor Robert M. Suggitt

Robert M. Suggitt 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: 5458808
    Abstract: A process is provided for continuously controlling the hydrocarbon heat content and flow rate of a partial oxidation unit feed-gas stream under conditions where the composition and hence the hydrocarbon heat content of the feed-gas stream is subject to variation. The hydrocarbon heat content of the incoming gases is continuously measured and compared against a design hydrocarbon heat content. An evaluating means calculates whether a moderator is required to decrease the hydrocarbon heat content to the design hydrocarbon heat content or a supplemental high hydrocarbon heat content gas is required to increase the hydrocarbon heat content to the design hydrocarbon heat content. The process utilizes recycle synthesis gas as a moderator.
    Type: Grant
    Filed: January 7, 1994
    Date of Patent: October 17, 1995
    Assignee: Texaco Inc.
    Inventors: Robert M. Suggitt, Raymond F. Wilson, Wing-Chiu F. Fong
  • Patent number: 5441990
    Abstract: Part of CO-rich syngas, including volatile metal or any acid impurities, reacts with water making cleaned, heated, H.sub.2 -enriched syngas. The rest of the impure CO-rich syngas is combined with hot, H.sub.2 -enriched syngas making cleaned, H.sub.2 -rich syngas, useful for making methanol or oxo compounds.
    Type: Grant
    Filed: May 13, 1994
    Date of Patent: August 15, 1995
    Assignee: Texaco Inc.
    Inventors: Allen M. Robin, Robert M. Suggitt
  • Patent number: 5403366
    Abstract: A partial oxidation process for the production of a stream of hot clean gas substantially free from particulate matter, alkali metal compounds, hydrogen halides, hydrogen cyanide, sulfur-containing gases, and with or without ammonia for use as synthesis gas, reducing gas, or fuel gas. A pumpable hydrocarbonaceous fuel selected from the group consisting of liquid hydrocarbonaceous fuel or liquid emulsions thereof, an aqueous slurry of petroleum coke, and mixtures thereof and wherein said hydrocarbonaceous fuel contains halides, alkali metal compounds, sulfur, nitrogen and inorganic ash containing components, is reacted in a gasifier by partial oxidation to produce a hot raw gas stream comprising H.sub.2, CO, CO.sub.2, H.sub.2 O, CH.sub.4, NH.sub.3, HCN, HCl, HF, H.sub.2 S, COS, N.sub.2, Ar, particulate matter, vapor phase alkali metal compounds, and molten slag. The hot raw gas stream from the gasifier is cooled in a radiant cooler and cleaned.
    Type: Grant
    Filed: June 17, 1993
    Date of Patent: April 4, 1995
    Assignee: Texaco Inc.
    Inventors: Thomas F. Leininger, Allen M. Robin, James K. Wolfenbarger, Robert M. Suggitt
  • Patent number: 5401282
    Abstract: A partial oxidation process for the production of a stream of hot clean gas substantially free from particulate matter, ammonia, alkali metal compounds, halides and sulfur-containing gas for use as synthesis gas, reducing gas, or fuel gas. A hydrocarbonaceous fuel comprising a solid carbonaceous fuel with or without liquid hydrocarbonaceous fuel or gaseous hydrocarbon fuel, wherein said hydrocarbonaceous fuel contains halides, alkali metal compounds, sulfur, nitrogen and inorganic ash containing components, is reacted in a gasifier by partial oxidation to produce a hot raw gas stream comprising H.sub.2, CO, CO.sub.2, H.sub.2 O, CH.sub.4, NH.sub.3, HCl, HF, H.sub.2 S, COS, N.sub.2, Ar, particulate matter, vapor phase alkali metal compounds, and molten slag. The hot raw gas stream from the gasifier is split into two streams which are separately deslagged, cleaned and recombined. Ammonia in the gas mixture is catalytically disproportionated into N.sub.2 and H.sub.2.
    Type: Grant
    Filed: June 17, 1993
    Date of Patent: March 28, 1995
    Assignee: Texaco Inc.
    Inventors: Thomas F. Leininger, Allen M. Robin, James K. Wolfenbarger, Robert M. Suggitt
  • Patent number: 5394686
    Abstract: Mechanical and electrical power are produced along with synthesis or fuel gas by the partial oxidation process with integrated combustion and steam turbines. By-product vaporized liquefied natural gas for feed to a pipeline for gas consumers is obtained by heat exchange with heat containing streams from the partial oxidation gasification and gas cleaning and purification zone; and optionally from heat containing streams from combustion and/or steam turbine zones which are integrated with the partial oxidation process. Heat from the combustion turbine exhaust gas is used as follows: (1) superheat steam for use in a steam turbine; (2) preheat water saturated clean sulfur-free synthesis or fuel gas with or without supplemental methane enrichment; (3) preheat oxygen gas for the partial oxidation zone; and (4) vaporize LNG. Pre, inter, and after stages of an air compressor are cooled by indirect heat exchange with LNG which is thereby warmed or vaporized.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: March 7, 1995
    Assignee: Texaco Inc.
    Inventors: Edward T. Child, William L. Lafferty, Jr., Robert M. Suggitt, Frederick C. Jahnke
  • Patent number: 5295350
    Abstract: Mechanical and electrical power are produced along with synthesis or fuel gas by the partial oxidation process with integrated combustion and steam turbines. By-product vaporized liquefied natural gas for feed to a pipeline for gas consumers is obtained by heat exchange with heat containing streams from the partial oxidation gasification and gas cleaning and purification zone; and optionally from heat containing streams from combustion and/or steam turbine zones which are integrated with said partial oxidation process. Heat from the combustion turbine exhaust gas is used as follows: (1) superheat steam for use in a steam turbine; (2) preheat water saturated clean sulfur-free synthesis or fuel gas with or without supplemental methane enrichment; (3) preheat oxygen gas for said partial oxidation zone; and (4) vaporize LNG. Pre, inter, and after stages of an air compressor are cooled by indirect heat exchange with LNG which is thereby warmed or vaporized.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: March 22, 1994
    Assignee: Texaco Inc.
    Inventors: Edward T. Child, William L. Lafferty, Jr., Robert M. Suggitt, Frederick C. Jahnke
  • Patent number: 5232467
    Abstract: Cryogenic liquefied natural gas (LNG) is used as a source of refrigeration and methane in the production of dry sulfur-free, methane-enriched synthesis gas or fuel gas. Raw syngas is indirectly and directly contacted with cryogenic liquefied natural gas (LNG) and cooled thereby below the dew point. Water is thereby condensed out and separated from the process gas stream. Further, the liquid LNG vaporizes and increases the methane content of the dewatered synthesis gas. Cold liquid absorbent solvent contacts the dry CH.sub.4 -enriched synthesis gas in an absorption column and absorbs the acid gases e.g. H.sub.2 S and COS and optionally H.sub.2 S+COS+CO.sub.2. In a preferred embodiment, the rich solvent absorbent is regenerated in a stripping column and the released acid gases are sent to a Claus unit for the production of elemental sulfur. In a second embodiment, the regenerated lean liquid absorbent solvent may be mixed with the dry, purified synthesis gas leaving from the top of the absorption tower.
    Type: Grant
    Filed: June 18, 1992
    Date of Patent: August 3, 1993
    Assignee: Texaco Inc.
    Inventors: Edward T. Child, William L. Lafferty, Jr., Robert M. Suggitt, Frederick C. Jahnke
  • Patent number: 5152975
    Abstract: A process for producing high purity hyrogen is disclosed. Specifically, the process includes (1) partially oxidizing a gaseous hydrocarbonaceous feedstock to produce a synthesis gas mixture of carbon monoxide and hydrogen, (2) reacting the synthesis gas mixture with steam to convert the carbon monoxide into a raw gas mixture which primarily includes carbon dioxide and hydrogen, and (3) subjecting the raw gas mixture to pressure swing adsorption to purify the raw gas mixture, thereby producing high purity hydrogen and a reject gas mixture of impurities.The gaseous hydrocarbonaceous feed is specific, inasmuch as it is characterized by containing a major component which includes at least one C.sub.1 -C.sub.3 hydrocarbon and which has an average molecular weight of up to about 30.
    Type: Grant
    Filed: March 15, 1991
    Date of Patent: October 6, 1992
    Assignee: Texaco Inc.
    Inventors: Wing-Chiu F. Fong, Henry C. Chan, Robert M. Suggitt, Manuel E. Quintana
  • Patent number: 5152976
    Abstract: A process for producing high purity hydrogen is disclosed. Specifically, the process includes (1) partially oxidizing a refinery offgas feedstock to produce a synthesis gas mixture of carbon monoxide and hydrogen, (2) reacting the synthesis gas mixture with steam to convert the carbon monoxide into a raw gas mixture which primarily includes carbon dioxide and hydrogen, and (3) purifying the raw gas mixture to produce high purity hydrogen and a reject gas mixture of impurities. In a preferred embodiment, the purification step occurs in a pressure swing adsorption unit.Alternative embodiments are also described, each of which essentially involve the optional treatment and/or use of the reject gas mixture of impurities.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: October 6, 1992
    Assignee: Texaco Inc.
    Inventors: Wing-Chiu F. Fong, Henry C. Chan, Robert M. Suggitt, Manuel E. Quintana
  • Patent number: 4983296
    Abstract: Municipal sanitary sewage sludge is disposed of by an improved partial oxidation process without polluting the environment. Aqueous slurries of sewage sludge are upgraded by hydrothermal treatment, preferably while being sheared, concentrated, and then mixed with a supplemental fuel, preferably coal. A pumpable aqueous slurry of sewage sludge-coal and/or petroleum coke is thereby produced having a greater total solids and heat content (HHV) as well as containing an increased amount of sewage sludge for reacting with free-oxygen containing gas in a free-flow partial oxidation gas generator. Hot quench water or steam produced by cooling the hot raw effluent stream of synthesis gas, reducing gas or fuel gas from the gasifier may provide heat for the hydrothermal step.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: January 8, 1991
    Assignee: Texaco Inc.
    Inventors: Matthew A. McMahon, Robert M. Suggitt, Ronald J. McKeon, Albert Brent
  • Patent number: 4933086
    Abstract: Municipal sanitary sewage sludge is disposed of by an improved partial oxidation process without polluting the environment. Aqueous slurries of sewage sludge are upgraded by being sheared without heating, concentrated if necessary, and then mixed with a supplemental fuel, preferably coal. In one embodiment, the aqueous slurry of sewage sludge and the supplemental coal and/or petroleum coke are introduced into a shearing mixer for simultaneous shearing and mixing together. A pumpable aqueous slurry of sewage sludge-coal and/or petroleum coke is thereby produced having an increased amount of total solids and an increased heat content (HHV) as well as containing an increased amount of sewage sludge for reacting with free-oxygen containing gas in a free-flow partial oxidation gas generator. Hot quench water or steam produced by cooling the hot raw effluent stream of synthesis gas, reducing gas or fuel gas from the gasifier may provide heat for indirect heat exchange with other streams in the process.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: June 12, 1990
    Assignee: Texaco Inc.
    Inventors: Matthew A. McMahon, Robert M. Suggitt, Ronald J. McKeon, Albert Brent
  • Patent number: 4919688
    Abstract: Gasifier for combusting a particulated carbonaceous fuel by injecting a stream of the fuel into the gasifier combustion chamber together with a combustion supporting gas. The fuel mixture is burned to produce a usable gas and a particulated residual, both of which are directed into a liquid holding quench chamber. A constricted, frusto-conical throat which conducts the usable gas and particulated residual includes one or more nozzles that open into the throat and serve to direct pressurized jets of a scouring fluid into contact with residual particles which have become deposited on the throat wall, to displace the latter and thereby keep the throat void of such deposits.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: April 24, 1990
    Assignee: Texaco Inc.
    Inventors: Robert M. Suggitt, Mitri S. Najjar
  • Patent number: 4863489
    Abstract: A process for the production of demercurized synthesis gas, reducing gas or fuel gas. Mercury-containing fossil fuels e.g. coal were reacted by partial oxidation to produce gaseous mixtures comprising H.sub.2, CO, H.sub.2 O, CO.sub.2, H.sub.2 S, COS, entrained slag and/or ash, mercury vapor, and optionally CH.sub.4, NH.sub.3, N.sub.2 and Ar. Unexpectedly, the mercury vapor was produced in the reaction zone; and it was found to be thermodynamically stable even in the presence of H.sub.2 S under the strong reducing conditions that prevailed in the gas generator. No new sulfides of mercury were formed. The mercury vapors were removed from the main body of the process gas stream in a pressurized solvent scrubber at a relatively low temperature. By this means, the mercury vapor was condensed and simultaneously the mercury and sulfur contents of the clean process gas stream were reduced to low levels.
    Type: Grant
    Filed: February 3, 1989
    Date of Patent: September 5, 1989
    Assignee: Texaco Inc.
    Inventor: Robert M. Suggitt
  • Patent number: 4778484
    Abstract: Synthesis gas, fuel gas, or reducing gas is produced by the noncatalytic partial oxidation of a sulfur-containing liquid hydrocarbonaceous fuel or a slurry of sulfur-containing solid carbonaceous fuel with a free-oxygen containing gas in the first free-flow reaction zone located in a refractory lined gas generator at an autogenous temperature in the range of about 1900.degree. F. to 2900.degree. F. and above the ash-fusion temperature of the slag formed in the reaction zone. About 85 to 99 weight percent of the carbon in the fuel feed to the reaction zone is converted into carbon oxides. At least a portion of the hot effluent gas stream from the reaction zone is passed through a free-flow second reaction zone R.sub.2 in admixture with a second portion of sulfur-containing fuel and an iron-containing additive. In the second reaction zone the carbon in the second portion of fuel, unconverted fuel and particulate matter from R.sub.1 react with H.sub.2 O and/or CO.sub.2 to produce supplemental H.sub.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: October 18, 1988
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Robert M. Suggitt
  • Patent number: 4778485
    Abstract: Synthesis gas, fuel gas, or reducing gas is produced by the noncatalytic partial oxidation of a sulfur-containing liquid hydrocarbonaceous fuel or a slurry of sulfur-containing solid carbonaceous fuel with a free-oxygen containing gas in the free-flow reaction zone of a refractory lined gas generator at an autogenous temperature in the range of about 1900.degree. F. to 2900.degree. F. and above the ash-fusion temperature of the slag formed in the reaction zone, so that about 75 to 95 weight percent of the carbon in the fuel feed to the reaction zone is converted into carbon oxides. At least a portion of the hot effluent gas stream from the reaction zone is passed through a free-flow radiant cooler in admixture with an iron-containing additive. In the radiant cooler at least a portion of the sulfur-containing gases e.g. H.sub.2 S and COS react with the iron-containing additive to produce particulate matter comprising iron oxysulfide.
    Type: Grant
    Filed: August 28, 1987
    Date of Patent: October 18, 1988
    Assignee: Texaco Inc.
    Inventors: Robert M. Suggitt, Mitri S. Najjar, Roger J. Corbeels
  • Patent number: 4776860
    Abstract: Synthesis gas, fuel gas, or reducing gas is produced by the noncatalytic partial oxidation of a sulfur-containing liquid hydrocarbonaceous fuel or a slurry of sulfur-containing solid carbonaceous fuel with a free-oxygen containing gas in a first free-flow reaction zone R.sub.1 located in a refractory lined gas generator at an autogenous temperature in the range of about 190.degree. F. to 2900.degree. F. and above the ash-fusion temperature of the slag formed in the reaction zone. About 85 to 99 weight percent of the carbon in the fuel feed to the reaction zone is converted into carbon oxides. At least a portion of the hot effluent gas stream from the first reaction zone is passed through a free-flow second reaction zone R.sub.2 in admixture with a second portion of sulfur-containing fuel and a calcium-containing additive. An equilibrium oxygen concentration with a partial pressure which is less than about 10.sup.-12 atmosphere is provided in the gas phase in the first and second reaction zones.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: October 11, 1988
    Assignee: Texco Inc.
    Inventors: Mitri S. Najjar, Robert M. Suggitt
  • Patent number: 4692172
    Abstract: Low sulfur, iron and calcium containing solid carbonaceous fuel having a high melting point ash is mixed with a sufficient amount of iron sulfide containing material or supplemental iron and sulfur containing reactant materials that react in the reaction zone to produce iron and sulfur containing compounds. The mixture of materials is reacted in a free-flow gasifier by partial oxidation to produce a raw gas stream of synthesis gas, reducing gas or fuel gas, containing entrained particulate matter including molten slag. By the process, sufficient iron and sulfur are in the reaction zone so that the melting point of the fuel ash is decreased, and the mole ratio H.sub.2 S/H.sub.2 +CO in the raw gas stream is greater than 0.01. Further, the amount of iron in the molten ash is greater than 10.0 wt. %, and preferably at least 14 wt. % of the molten ash. By this means, the fluid temperature of the molten ash entrained in the raw gas stream is reduced at least 100.degree. F.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: September 8, 1987
    Assignee: Texaco Inc.
    Inventors: Robert J. Stellaccio, Robert M. Suggitt
  • Patent number: 4671803
    Abstract: Process for producing synthesis gas, reducing gas, or fuel gas substantially free-from volatile metal hydride impurities e.g. a hydride of arsenic, germanium, antimony, lead, tin, silicon, and mixtures thereof starting with the partial oxidation of liquid hydrocarbon fuel and/or solid carbonaceous fuel containing at least one mtal impurity from Group IV A and V A of the Periodic Table of Elements. At least one intermetallic reaction product of said metal impurity from Group IV A and V A leaves the gas generator in admixture with the hot raw process gas stream. A metal hydride forms when the gas stream is quench cooled and scrubbed with water. The metal hydride is then decomposed into its elements e.g. H.sub.2 and a Group IV A aor V A metal when the cooled and scrubbed gas stream contacts a solid sorbent material having a minimum surface area of 10 square meters per gram in a gas-solids contacting zone at a temperature in the range of about 0.degree. C. to 350.degree. C.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: June 9, 1987
    Assignee: Texaco Development Corp.
    Inventor: Robert M. Suggitt
  • Patent number: 4532227
    Abstract: Low ash pelleted carbon is prepared by contacting pelleted carbon first with hydrochloric acid followed by leaching with hydrofluoric acid.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: July 30, 1985
    Assignee: Texaco Development Corporation
    Inventor: Robert M. Suggitt
  • Patent number: 4468376
    Abstract: A method for disposing of a halogenated organic material includes the steps of partially oxidizing the halogenated organic material, a hydrocarbonaceous material, and a nitrogen compound with a free-oxygen containing gas and optionally with a temperature moderator in a synthesis gas generator under partial oxidation conditions. The partial oxidation produces a synthesis gas containing, among others, hydrogen halide and ammonia. The synthesis gas is then contacted with a quench medium which dissolves the hydrogen halide into the quench medium. The hydrogen halide and quench medium can be disposed of by the addition of a base to form a readily disposed metal salt of the halide.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: August 28, 1984
    Assignee: Texaco Development Corporation
    Inventor: Robert M. Suggitt