Patents Assigned to The M. W. Kellogg Company
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Patent number: 5306418Abstract: A nozzle, and FCC process using the nozzle for atomizing heavy feed to a riser reactor, are disclosed. A liquid feed stream is atomized by radial out-to-in impingement of atomizing vapor, discharged onto an impingement plug in an annular expansion region, then sprayed through an outlet. Baffles at the expansion region outlet, and an orifice outlet improve feed atomization and feed/FCC catalyst contact in a riser reactor. The nozzle may be used to distribute liquid over other reactor beds, or to add liquid to distillation columns.Type: GrantFiled: April 2, 1992Date of Patent: April 26, 1994Assignees: Mobil Oil Corporation, M. W. Kellogg CompanyInventors: Suisheng M. Dou, Allen R. Hansen, Steven C. Heidenreich, William J. Hillier, Phillip K. Niccum, Maury I. Schlossman
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Patent number: 5303769Abstract: A thermosiphon reboiler heat exchanger which integrates multiple parallel reboilers into a single unit and a heating method are disclosed. The present heat exchanger utilizes a compartmentalized shell for vaporizing a tube-side liquid with a plurality of hot shell-side fluids. The present apparatus is particularly useful for a fractionation system in a phenol manufacture process.Type: GrantFiled: September 25, 1992Date of Patent: April 19, 1994Assignee: The M. W. Kellogg CompanyInventor: Otto H. Hoegberg
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Patent number: 5250270Abstract: A fixed bed, dual-zone radial flow catalytic reactor is disclosed. In particular, the catalyst bed configuration includes a first freeboard outwardly radial flow catalyst zone in series with a second inwardly radial flow zone separated by an interconnecting substantially impermeable catalyst chute to accommodate catalyst settling while preventing hot spots and/or fluidization in the freeboard area. A gas distributor divides the freeboard zone into segments including a bypass segment and one or more catalyst segments. The radial flow of gas through each segment is essentially unaffected by the level of catalyst so that the flow pattern is not adversely affected by catalyst setting in the freeboard zone.Type: GrantFiled: July 17, 1992Date of Patent: October 5, 1993Assignee: The M. W. Kellogg CompanyInventor: Stephen A. Noe
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Patent number: 5247907Abstract: A process furnace and method of operating a furnace are disclosed. The furnace comprises a radiant heating chamber, a primary convection section leg, a secondary convection section leg with two or more parallel flow channels, convection burners to heat the primary and/or secondary convection sections and dampers to adjust flue gas flow and temperature through the parallel flow channels. Combustion air comprising a mixture of gas turbine exhaust and fresh air which has been preheated in one of the parallel flow channels s supplied to the burners. The split flue design facilitates greater control of the flue gas temperature for improved operating efficiency.Type: GrantFiled: May 5, 1992Date of Patent: September 28, 1993Assignee: The M. W. Kellogg CompanyInventors: Jing M. Lee, Larry G. Hackemesser, William J. Bracken
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Patent number: 5232283Abstract: An apparatus and method for mixing concurrently downwardly flowing fluids is disclosed. The apparatus comprises a tray extending horizontally across a cross-section of a mixing chamber and having an aperture in the middle. A cap having a pair of opposing openings covers the aperture. Fluids pass through the openings into a pan adjacent a downstream portion of the mixing chamber and spaced below the tray. A tube encircling the aperture is disposed between the cap and the pan. The tube has notches cut into the lower wall to allow the fluids to enter the pan. Radially spaced risers extending from the bottom of the pan provide fluid communication to a downstream portion of the mixing chamber. The risers have upper ends which are above the notches and spaced below the tray. The mixing apparatus can be used between two catalyst beds in a vertical, fixed-bed reactor, wherein a hot, mixed-phase effluent stream is quenched with a hydrogen-rich gas in hydrodesulfurization, hydrocracking, and like processes.Type: GrantFiled: October 13, 1992Date of Patent: August 3, 1993Assignee: The M. W. Kellogg CompanyInventors: Kenneth W. Goebel, Vishnu A. Patel, Earl L. Whittington, Jr.
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Patent number: 5228825Abstract: There is disclosed a flange or pressure vessel closure device and method for deheading a coke drum. The coke drum deheading device has an annular retaining element spring biased from a lower flange of a coke drum, and a plurality of hooks which extend from the retaining element to engage a cradle holding the bottom head against the flange. When it is desired to disengage the head from the flange, the hook retaining element is moved by a first set of cylinders toward the flange to release tension from the hooks so that they can be disengaged from the bottom head by pivoting them outwardly using a second set of cylinders or other hook pivoting means. The bottom head can then be disengaged from the flange, lowered and moved laterally away from the coke drum on a hydraulic table.Type: GrantFiled: November 1, 1991Date of Patent: July 20, 1993Assignee: The M. W. Kellogg CompanyInventors: Joseph Fruchtbaum, Frederick B. Kronmiller
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Patent number: 5223238Abstract: A method is described which enables ammonia plant process condensate contaminated with ammonia, carbon dioxide and methanol and urea plant condensate contaminated with urea, ammonia, carbon dioxide and other combined forms of ammonia and carbon dioxide to be simultaneously converted, in a single treatment vessel, substantially and continuously to a vaporous stream rich in ammonia, carbon dioxide and methanol and an liquid stream poor in ammonia, carbon dioxide, methanol and urea. The vaporous stream thus produced is recycled and employed as a feedstock in the reforming section in the ammonia plant.Type: GrantFiled: January 16, 1992Date of Patent: June 29, 1993Assignee: The M. W. Kellogg CompanyInventor: Thomas A. Czuppon
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Patent number: 5122299Abstract: Synthesis gases are produced by reaction of steam, oxidant, and a major portion of fresh hydrocarbon feed in an exothermic catalytic reforming zone to a first reformed gas having very low methane content. The balance of the fresh feed is reacted with steam in an endothermic catalytic reforming zone to a second reformed gas having a low methane content. The first and second reformed gases are combined and passed in indirect heat exchange with reactants in the endothermic reforming zone to provide all of the heat required therein and are then recovered as product synthesis gases.Type: GrantFiled: March 14, 1991Date of Patent: June 16, 1992Assignee: The M. W. Kellogg CompanyInventor: Joseph R. LeBlanc
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Patent number: 5011625Abstract: Ammonia synthesis gas is produced by reaction of steam, an oxidant, and a major portion of fresh hydrocarbon feed in an exothermic catalytic reforming zone to a first reformed gas having very low methane content. The balance of the fresh feed is reacted with steam in an endothermic catalytic reforming zone to a second reformed gas having a low methane content. The first and second reformed gases are combined and passed in indirect heat exchange with reactants in the endothermic reforming zone to provide all of the heat required therein and are then recovered as raw ammonia synthesis gas.Type: GrantFiled: December 11, 1989Date of Patent: April 30, 1991Assignee: The M. W. Kellogg CompanyInventor: Joseph R. Le Blanc
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Patent number: 4940828Abstract: Dilution steam for steam cracking hydrocarbons to produce lower olefins is economically provided by saturating gaseous hydrocarbon feed with water at a temperature selected to achieve the particular steam to hydrocarbon ratio desired in the steam cracking step. Complete saturation of the feed gas is ensured by injecting the gas into the flooded portion of an indirectly heated tubular saturation zone.Type: GrantFiled: October 13, 1989Date of Patent: July 10, 1990Assignee: The M. W. Kellogg CompanyInventors: William C. Petterson, Thomas A. Wells, Peter Cherish, Stephen W. Morgan
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Patent number: 4908121Abstract: When steam cracking hydrocarbons to lower olefins in a tubular fired furnace having a convection section for preheating hydrocarbon feed, feedstock flexibility to process light feeds is provided by cooling mixed feed of steam and hydrocarbon followed by reheating to the desired mixed feed temperature.Type: GrantFiled: May 12, 1986Date of Patent: March 13, 1990Assignee: The M. W. Kellogg CompanyInventors: Larry G. Hackemesser, Bradley L. Lankford
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Patent number: 4735780Abstract: A vertical, cold wall, three bed ammonia converter having upper and lower shell and tube heat exchangers wherein the lower heat exchanger is disposed axially within the upper, annular catalyst bed and preheated synthesis gas from the heat exchangers is initially converted in the middle catalyst bed which is penetrated by first, second, and third coaxial pipes. Partially converted gas from the middle catalyst bed flows upwardly through the annulus formed by the second and third axial pipes through the hot side of the lower exchanger and is then divided for parallel flow through the upper catalyst bed and, by way of the annulus formed by the first and second axial pipes, the lower catalyst bed. Converted gas from the upper and lower catalyst beds is then combined and introduced to the hot side of the upper feed/effluent exchanger.Type: GrantFiled: July 27, 1987Date of Patent: April 5, 1988Assignee: The M. W. Kellogg CompanyInventor: Stephen A. Noe
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Patent number: 4727723Abstract: A method for sub-cooling normally gaseous hydrocarbon mixtures produced in a cryogenic process unit wherein the mixture is introduced to a gas/liquid separator, which may be a storage vessel, and vapor containing at least two components of the mixture is recovered as refrigerant, employed in an open cycle refrigeration system to sub-cool the hydrocarbon mixture, and returned to the separator. The system is particularly useful for sub-cooling a hydrocarbon product stream while, at the same time, recovering boil-off vapor from a cryogenic storage vessel.Type: GrantFiled: June 24, 1987Date of Patent: March 1, 1988Assignee: The M. W. Kellogg CompanyInventor: Charles A. Durr
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Patent number: 4726826Abstract: Heavy components of hydrocarbon gas mixtures are recovered through partial condensation of a first portion of the starting gas by indirect heat exchange with a refrigerant wherein the condensate formed is entrained in the gas stream. The condensate is separated from the resulting partially condensed, two-phase mixture and the separated condensate is then thermally stripped of light components by heat exchange with a second portion of the starting gas which is thereby also partially condensed. Heavy components from the starting gas mixture are recovered as stripped hydrocarbon condensate.Type: GrantFiled: July 17, 1987Date of Patent: February 23, 1988Assignee: The M. W. Kellogg CompanyInventors: Duffer B. Crawford, T. Michael O'Connor, Ramanathan R. Tarakad
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Patent number: 4711651Abstract: A process for separation of a high pressure gas stream such as refinery gas in which the starting gas mixture is cooled and separated into a first vapor portion and a first liquid portion which is expanded to an intermediate pressure. The first vapor portion is further cooled and separated into a second vapor portion which may be further processed for ultimate recovery of, for example, a methane-rich product gas and a second liquid portion which is expanded to essentially the same intermediate pressure and combined with the expanded first liquid portion. The resulting mixed intermediate pressure stream or a portion thereof is then employed as refrigerant.Type: GrantFiled: December 19, 1986Date of Patent: December 8, 1987Assignee: The M. W. Kellogg CompanyInventors: Shanmuk Sharma, Donnie K. Hill, Charles A. Durr
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Patent number: 4710214Abstract: A process for separation of a high pressure gas stream such as light refinery gases in which the gas mixture is expanded, preferably through a turbine, and separated into first vapor and liquid portions. The first vapor portion may be recovered as, for example, methane-rich product gas. The first liquid portion is raised to an intermediate pressure, revaporized, and introduced to a fractionator from which an ethane-containing stream is recovered. The ethane-containing stream is then cooled and separated into a second vapor portion and a second liquid portion which is then expanded and combined with the expanded starting gas mixture to increase the amount of refrigeration that may be recovered from the first liquid stream prior to its fractionation.Type: GrantFiled: December 19, 1986Date of Patent: December 1, 1987Assignee: The M. W. Kellogg CompanyInventors: Shanmuk Sharma, Donnie K. Hill, Charles A. Durr
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Patent number: 4702819Abstract: A process for separating gaseous or liquid hydrocarbons in first and second fractionation zones wherein the first fractionation zone employs a side reboiler discharging below the side draw point. A vapor sidestream is removed from the first fractionator below the side draw point and introduced to the second fractionator. The flow scheme permits control of the first fractionator bottoms temperature to match available low level waste heat which may therefore be used in fractionator reboiling duty.Type: GrantFiled: December 22, 1986Date of Patent: October 27, 1987Assignee: The M. W. Kellogg CompanyInventors: Shanmuk Sharma, Donnie K. Hill, Charles A. Durr
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Patent number: 4696799Abstract: A horizontal, cold wall, multi-bed ammonia converter having two, shell and tube interchangers for cooling reaction gas streams leaving respectively the first and second catalyst beds with incoming reactant gases wherein each of the interchangers is vertically oriented and physically located between catalyst beds. The catalyst beds are adiabatic, slab-shape beds defined in part by side portions of the inner wall of the converter and are arranged for downward, transverse flow of reacting gases. Longitudinal conduits and baffling in cooperation with the arrangement of catalyst beds and interchangers provide serial flow of gas through the cold side of each of the interchangers, a first catalyst bed, the hot side of one of the interchangers, a second catalyst bed, the hot side of the other interchanger, a third catalyst bed, and, optionally, a fourth catalyst bed.Type: GrantFiled: July 15, 1986Date of Patent: September 29, 1987Assignee: The M. W. Kellogg CompanyInventor: Stephen A. Noe
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Patent number: 4695367Abstract: Diesel range fuel is produced in excess of gasoline range fuel from virgin hydrocarbon oils having low carbon content by heat soaking under mild thermal cracking conditions carried out at low pressure wherein the cracked fractions are removed substantially as they are formed.Type: GrantFiled: March 24, 1986Date of Patent: September 22, 1987Assignee: The M. W. Kellogg CompanyInventors: Daniel D. Ezernack, Robert B. Armstrong
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Patent number: 4693731Abstract: Mercury is removed from natural gas by contacting the gas with a relatively mercury-free liquid state hydrocarbon and recovering a mercury-lean methane-rich gas and a mercury-enriched hydrocarbon liquid. The mercury-free hydrocarbon liquid may be obtained by separation of mercury from the mercury-enriched hydrocarbon liquid or its derivative streams.Type: GrantFiled: October 27, 1986Date of Patent: September 15, 1987Assignee: The M. W. Kellogg CompanyInventors: Ramanathan R. Tarakad, Duffer B. Crawford