Patents Assigned to M. W. Kellogg Company
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Patent number: 4648999Abstract: An apparatus for contacting fluids combined with solids comprises a cylindrical vessel with a slurry or liquid feed inlet port, a liquid outlet port, a gas inlet port and a gas outlet port. The vessel includes a lower cylindrical baffle which defines a stilling chamber therearound, the main contacting section of the vessel being above the stilling chamber. The lower end of the baffle extends below the liquid outlet port which discharges liquid from the stilling chamber. A cylindrical member is disposed in the cylindrical vessel inwardly of the stilling chamber. It has a lower end which is aligned with the gas inlet port for receiving gas therefrom and an upper end which is higher than a lower edge of the cylindrical baffle. The main contacting section above the cylindrical member has a height which makes a ratio with a length of the cylindrical member having a value within the range between 2 and 50.Type: GrantFiled: July 22, 1985Date of Patent: March 10, 1987Assignee: M. W. Kellogg CompanyInventors: Robert B. Armstrong, Huibert S. Jongenburger, Pasupati Sadhukhan
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Patent number: 4634582Abstract: A process for removing sulfur dioxide from a gas stream by absorption in a buffered, aqueous thiosulfate and polythionate solution followed by regeneration of the enriched solution with hydrogen sulfide to form sulfur wherein excess hydrogen sulfide recovered from the regeneration step is introduced to the absorption step to reduce bisulfite concentration in the enriched solution.Type: GrantFiled: November 18, 1985Date of Patent: January 6, 1987Assignee: The M. W. Kellogg CompanyInventors: A. Glenn Sliger, James J. O'Donnell, W. Ronald Cares, Aldrich H. Northup, Jr.
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Patent number: 4617109Abstract: Combustion air for steam cracking furnaces is preheated by indirect heat exchange with medium pressure and low pressure steam that has been expanded through steam turbines from high pressure steam produced in the hot section of an ethylene production plant.Type: GrantFiled: December 23, 1985Date of Patent: October 14, 1986Assignee: The M. W. Kellogg CompanyInventors: Thomas A. Wells, William C. Petterson
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Patent number: 4615870Abstract: A hydrotreating reactor having a plurality of vertically spaced contacting stages having frusto-conical baffles for back-mixing hydrocarbon oil being treated and a plurality of clear oil outlets in fluid communication with a corresponding plurality of annular stilling chambers.Type: GrantFiled: March 11, 1985Date of Patent: October 7, 1986Assignee: The M. W. Kellogg CompanyInventors: Robert B. Armstrong, Huibert S. Jongenburger, Pasupati Sadhukhan
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Patent number: 4579727Abstract: A process for recovering elemental sulfur from a hydrogen sulfide containing gas stream by reacting the hydrogen sulfide in the gas stream with a buffered aqueous solution enriched in thiosulfate ions at an initial pH between about 4.5 and 6.5 for residence time to sufficiently react a portion of the hydrogen sulfide to elemental sulfur. The elemental sulfur is then removed and the solution now lean in thiosulfate ions is regenerated by the oxidation of the remaining hydrogen sulfide in the gas stream to deplete the hydrogen sulfide from the gas stream and to regenerate the liquid solution for recycling to the reduction zone.Type: GrantFiled: December 4, 1984Date of Patent: April 1, 1986Assignee: The M. W. Kellogg CompanyInventors: Walter A. Cronkright, Maury I. Schlossman, Aaage Solbakken, Christiaan P. van Dijk
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Patent number: 4579070Abstract: A method for combustion of sulfur-containing fuel in a circulating fluid bed combustion system wherein the fuel is burned in a primary combustion zone under reducing conditions and sulfur captured as alkaline sulfide. The reducing gas formed is oxidized to combustion gas which is then separated from solids containing alkaline sulfide. The separated solids are then oxidized and recycled to the primary combustion zone.Type: GrantFiled: March 1, 1985Date of Patent: April 1, 1986Assignee: The M. W. Kellogg CompanyInventors: Yung-Yi Lin, Pasupati Sadhukhan, Lowell D. Fraley, Keh-Hsien Hsiao
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Patent number: 4568532Abstract: Ammonia synthesis gas is partially converted over iron-based synthesis catalyst, cooled, and further converted over a more active synthesis catalyst.Type: GrantFiled: October 16, 1984Date of Patent: February 4, 1986Assignee: The M. W. Kellogg CompanyInventors: Gereld S. Benner, Joseph R. Le Blanc, Jing M. Lee, Harry P. Leftin, Philip J. Shires, Christiaan P. van Dijk
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Patent number: 4568531Abstract: Purge gas removed from a first synthesis loop for conversion of synthesis gas to ammonia over an iron based synthesis catalyst is converted to ammonia over a more active synthesis catalyst in a second synthesis loop.Type: GrantFiled: October 16, 1984Date of Patent: February 4, 1986Assignee: The M. W. Kellogg CompanyInventors: Christiaan P. van Dijk, Aage Solbakken, Bernard G. Mandelik
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Patent number: 4568530Abstract: A process for production of ammonia wherein stoichiometrically hydrogen-lean synthesis gas is reacted over a highly active synthesis catalyst.Type: GrantFiled: October 16, 1984Date of Patent: February 4, 1986Assignee: The M. W. Kellogg CompanyInventors: Bernard G. Mandelik, John R. Cassata, Philip J. Shires, Christiaan P. van Dijk
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Patent number: 4539310Abstract: Hydrocarbon feedstocks including those containing sulfur are steam reformed in the presence of a catalyst which in the unreduced condition contains nickel oxide, rare earth metal oxide, and zirconium oxide.Type: GrantFiled: May 30, 1984Date of Patent: September 3, 1985Assignee: The M. W. Kellogg CompanyInventors: Harry P. Leftin, Kashinath Z. Patil
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Patent number: 4490341Abstract: A wet scrubbing process for desulfurization of waste gas which employs calcium carbonate reactant in the presence of a magnesium compound wherein the magnesium compound is obtained from partially calcined, magnesium-containing limestone.Type: GrantFiled: September 1, 1983Date of Patent: December 25, 1984Assignee: The M. W. Kellogg CompanyInventor: W. Ronald Cares
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Patent number: 4482523Abstract: A vertical, cold wall, three bed ammonia converter wherein the first catalyst bed is in series flow with the second and third beds which are in parallel flow, the converter having an internal indirect heat exchanger for cooling effluent from the first catalyst bed.Type: GrantFiled: November 14, 1983Date of Patent: November 13, 1984Assignee: The M. W. Kellogg CompanyInventor: Robert B. Peterson
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Patent number: 4479925Abstract: Ammonia synthesis gas having excess nitrogen is produced in a reactor-exchanger primary reformer followed by an autothermal secondary reformer wherein process air for the latter is preheated by heat exchange with gas turbine exhaust and the primary reformer is heated by synthesis gas from the secondary reformer.Type: GrantFiled: September 13, 1982Date of Patent: October 30, 1984Assignee: The M. W. Kellogg CompanyInventors: Philip J. Shires, John R. Cassata, Bernard G. Mandelik, Christiaan P. van Dijk
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Patent number: 4479869Abstract: Hydrocarbon feed to a steam cracking furnace is heated to near cracking temperature by indirect heat exchange with steam to permit use of a range of feedstocks.Type: GrantFiled: December 14, 1983Date of Patent: October 30, 1984Assignee: The M. W. Kellogg CompanyInventors: William C. Petterson, Larry G. Hackemesser
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Patent number: 4452760Abstract: A horizontal, cold wall, catalytic converter useful in ammonia synthesis having an internal feed/effluent heat exchanger and plurality of catalyst beds arranged for preheating reactant gases by indirect heat exchange with effluent from the first catalyst bed and subsequent gas flow to a second catalyst bed the gas flows being directed by gas transfer means disposed between the first catalyst bed and the heat exchanger.Type: GrantFiled: January 18, 1982Date of Patent: June 5, 1984Assignee: The M. W. Kellogg CompanyInventors: Robert B. Peterson, Ralph Finello, George A. Denavit
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Patent number: 4443560Abstract: The present invention is an improvement to a process for producing methanol which uses both steam reforming and partial oxidation by adiabatically reforming with substantially pure oxygen the reformed gas to produce the maximum amount of hydrogen for the synthesis of methanol.Type: GrantFiled: July 28, 1982Date of Patent: April 17, 1984Assignee: The M. W. Kellogg CompanyInventors: Joseph R. Le Blanc, Jr., Dewey O. Moore, Robert V. Schneider, III
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Patent number: 4407973Abstract: The present invention is directed to a process which uses the methanol synthesis gas from steam reforming in a first methanol plant and effectively integrates a second methanol plant which uses as the methanol synthesis gas (a) the purge gas from the first methanol plant and (b) the clean syn-gas produced by partial oxidation.Type: GrantFiled: July 28, 1982Date of Patent: October 4, 1983Assignee: The M. W. Kellogg CompanyInventors: Christiaan P. van Dijk, Aage Solbakken, Jerry M. Rovner
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Patent number: 4352341Abstract: A system for producing superheated steam includes a waste heat boiler, a steam drum and a superheater. A process stream is utilized to provide the heat necessary to produce the steam and superheated steam. A floating head design is employed in both the waste heat boiler and the superheater.Type: GrantFiled: April 6, 1981Date of Patent: October 5, 1982Assignee: The M.W. Kellogg CompanyInventor: James R. Styslinger
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Patent number: 4302177Abstract: Apparatus and method are described for the vaporization of liquid fuel oils to produce a gaseous mixture suitable for burning in a burner normally designed for operation utilizing natural gas.Type: GrantFiled: June 5, 1978Date of Patent: November 24, 1981Assignee: The M. W. Kellogg CompanyInventors: Martin O. Fankhanel, Alfred K. Roosov
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Patent number: 4298589Abstract: The present invention is directed to an improved synthesis process and system for the production of ammonia. More specifically, the present invention involves the use of a split axial flow converter in the low pressure synthesis of ammonia.Type: GrantFiled: June 17, 1980Date of Patent: November 3, 1981Assignee: The M. W. Kellogg CompanyInventors: Joseph R. LeBlanc, Robert B. Peterson