Solids Moving Processes Patents (Class 208/176)
  • Patent number: 8709235
    Abstract: Process for increasing mixing in a fluidized bed. A slide, which may be in the form of a tube or trough, transports particles from an upper zone downward to a lower zone at a different horizontal position, thereby changing the horizontal position of the particle and creating lateral mixing in the fluidized bed. Increased mixing may improve efficiency for an apparatus using a fluidized bed. For example, increased lateral mixing in a regenerator may increase temperature and oxygen mixing and reduce stagnation to improve efficiency. A slide may be relatively unobtrusive, inexpensive, and simple for a retrofit or design modification and may improve combustion efficiency at high rates by enhancing the lateral blending of spent and regenerated catalyst.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: April 29, 2014
    Assignee: UOP LLC
    Inventors: Brian W. Hedrick, Keith A. Couch, Robert L. Mehlberg, Mohammad-Reza Mostofi-Ashtiani
  • Patent number: 8329028
    Abstract: Systems and processes for hydrocarbon conversion are provided that utilize a plurality of moving bed reactors. The reactors may be moving bed radial flow reactors. Optional mixers that mix a portion of a second hydrocarbon feed with the effluent stream from an upstream reactor, to produce reactor feed streams may be employed, and the reactor feed streams may be introduced at injection points prior to each reactor. Catalyst can be provided from the reaction zone of one reactor to the reaction zone of a downstream reactor through catalyst transfer pipes, and can be regenerated after passing through the reaction zones of the reactors. The moving bed reactors can be stacked in one or more reactor stacks.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: December 11, 2012
    Assignee: UOP LLC
    Inventors: Clayton C. Sadler, Mary Jo Wier, Laurence O. Stine, Christopher Naunheimer
  • Patent number: 8323476
    Abstract: Systems and processes for the hydroprocessing of a hydrocarbonaceous feed are provided that utilize a plurality of moving bed reactors. The reactors may be moving bed radial flow reactors. A hydrogen injection point can be provided prior to each reactor by providing a mixer that mixes hydrogen with a hydrocarbonaceous feed, or with the effluent stream from an upstream reactor, to produce a reactor feed stream. Catalyst can be provided from the reaction zone of one reactor to the reaction zone of a downstream reactor through catalyst transfer pipes, and can be regenerated after passing through the reaction zones of the reactors. The moving bed reactors can be stacked in one or more reactor stacks.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: December 4, 2012
    Assignee: UOP LLC
    Inventors: Clayton C. Sadler, Mary Jo Wier, Laurence O. Stine, Christopher Naunheimer
  • Patent number: 8282887
    Abstract: A reactor design and process for the dehydrogenation of hydrocarbons is presented. The reactor design includes a multibed catalytic reactor, where each of the reactor beds are fluidized. The catalyst in the reactor cascades through the reactor beds, with fresh catalyst input into the first reactor bed, and the spent catalyst withdrawn from the last reactor bed. The hydrocarbon feedstream is input to the reactor beds in a parallel formation, thereby decreasing the thermal residence time of the hydrocarbons when compared with a single bed fluidized reactor, or a series reactor scheme.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: October 9, 2012
    Assignee: UOP LLC
    Inventors: David N. Myers, Lev Davydov
  • Patent number: 8075227
    Abstract: An apparatus for the transfer of solid particulate matter from a low pressure system to a high pressure system is presented. The apparatus simplifies the particle transfer process, and is useful for systems where solid catalyst particles are cycled through a reactor and a regenerator.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: December 13, 2011
    Assignee: UOP LLC
    Inventor: Leon Yuan
  • Patent number: 8042284
    Abstract: A heating system and a method of controlling the heating system are provided. When a heating unit and a switch are turned on and off repeatedly by the predetermined number of times or more, only some of heaters of the heating unit are turned on, thereby increasing service life of the heating unit and the switch.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: October 25, 2011
    Assignee: LG Electronics Inc.
    Inventors: Hea Kyung Yoo, Seog Ho Go
  • Patent number: 7887264
    Abstract: Method and apparatus are provided for transferring particles from an upper zone through an intermediate zone to a lower zone. The transfer of particles between the zones through valveless conduits is regulated by varying the pressure of the intermediate zone and the flow rate of gas passing through the valveless conduits. A body within the lower zone is in particle communication with a valveless conduit and obstructs the particle flow within the lower zone.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: February 15, 2011
    Assignee: UOP LLC
    Inventors: Christopher Naunheimer, Paul A. Sechrist
  • Patent number: 7878737
    Abstract: Method and apparatus are provided for transferring particles from an upper zone through an intermediate zone to a lower zone. A valveless conduit provides particle communication from the upper zone to the middle zone and a valved conduit provides particle communication from the middle zone to the lower zone. The transfer of particles between the zones through the conduits is regulated by varying the pressure of the middle zone, the flow rate of gas passing through the valveless conduit, and the valve in the valved conduit.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: February 1, 2011
    Assignee: UOP LLC
    Inventor: Christopher Naunheimer
  • Patent number: 7878736
    Abstract: Method and apparatus are provided for transferring particles from an upper zone through an intermediate zone to a lower zone. The transfer of particles between the zones through valveless conduits is regulated by varying the pressure of the intermediate zone and the flow rate of gas passing through the valveless conduits. A container within the second zone is in particle communication with a valveless conduit and provides more consistent particle flows.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: February 1, 2011
    Assignee: UOP LLC
    Inventors: Christopher Naunheimer, Paul A. Sechrist
  • Patent number: 7874769
    Abstract: Method and apparatus are provided for transferring particles from an upper zone through an intermediate zone to a lower zone. The transfer of particles between the zones through valveless conduits is regulated by varying the pressure of the intermediate zone and the flow rate of gas passing through the valveless conduits. A body within the lower zone is in particle communication with a valveless conduit and obstructs the particle flow within the lower zone.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: January 25, 2011
    Assignee: UOP LLC
    Inventors: Christopher Naunheimer, Paul A. Sechrist
  • Patent number: 7867321
    Abstract: An improved cyclone system for disengaging solid and gaseous particles in fluid catalytic cracking (FCC) processes with reduced coke formation in disengager vessels, without favoring release of the disengaged catalyst into cyclones in subsequent stages, said system comprising legless cyclones 42 fitted with external collector pipes 43, is described. The collector pipes 43 optimize the purge of gases coming from the disengager vessel 49, reducing the time the hydrocarbons remain inside the disengager vessel 49, thus preventing overcracking and subsequent coke formation. Positioning of the external collector pipes 43 prevents release of the disengaged catalyst into cyclones in subsequent stages.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: January 11, 2011
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: Emanuel Freire Sandes, Paulo Sérgio Freire, José Geraldo Furtado Ramos, Aurélio Medina Dubois, José Mozart Fusco, Eduardo Cardoso de Melo Guerra, Wilson Kenzo Huziwara
  • Patent number: 7854906
    Abstract: A reactor for carrying out a reaction between two fluid starting materials over a catalyst bed with premixing of the fluid starting materials before introduction into the catalyst bed within a delay time of less than 150 ms in a mixing-in device, wherein the mixing-in device is made up of the following elements which are arranged essentially transverse to the inflow direction of the first fluid starting material stream: two or three rows arranged behind one another of tubes which have turbulence generators on the outside and constrict the flow cross section for the first fluid starting material stream to from ½ to 1/10, with the second fluid starting material stream being passed through the interiors of the tubes and injected via openings in the tubes into the first fluid starting material stream; a perforated plate upstream of the tubes; and a perforated plate downstream of the tubes, is proposed.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: December 21, 2010
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Olbert, Franz Corr, Sven Crone
  • Patent number: 7854835
    Abstract: A hydrocarbon desulfurization system that circulates fluidizable solid particles through a fluidized bed reactor, a fluidized bed regenerator, and a fluidized bed reducer to thereby provide for substantially continuous desulfurization of a hydrocarbon-containing fluid stream and substantially continuous regeneration of the solid particles. A novel transport system is employed for transporting the solid particles between the reactor, the regenerator, and the reducer. The transport system uses close-coupled vessels and gravity flow between various vessels to minimize equipment cost and particle attrition.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: December 21, 2010
    Assignee: China Petroleum & Chemical Corporation
    Inventors: Victor G. Hoover, Max W. Thompson, Darrin D. Barnes, Joe D. Cox, Philip L. Collins, Christopher J. Lafrancois, Ricky E. Snelling, Jean B. Thesee, Robert Zapata
  • Patent number: 7841808
    Abstract: Method and apparatus are provided for transferring particles from an upper zone through an intermediate zone to a lower zone. A valveless conduit provides particle communication from the upper zone to the middle zone and a valved conduit provides particle communication from the middle zone to the lower zone. The transfer of particles between the zones through the conduits is regulated by varying the pressure of the middle zone, the flow rate of gas passing through the valveless conduit, and the valve in the valved conduit.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: November 30, 2010
    Assignee: UOP LLC
    Inventor: Christopher Naunheimer
  • Patent number: 7841807
    Abstract: Method and apparatus are provided for transferring particles from an upper zone through an intermediate zone to a lower zone. The transfer of particles between the zones through valveless conduits is regulated by varying the pressure of the intermediate zone and the flow rate of gas passing through the valveless conduits. A container within the second zone is in particle communication with a valveless conduit and provides more consistent particle flows.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: November 30, 2010
    Assignee: UOP LLC
    Inventors: Christopher Naunheimer, Paul A. Sechrist
  • Patent number: 7837856
    Abstract: A reactor for carrying out a continuous oxydehydrogenation of a feed gas stream of saturated hydrocarbons after premixing with an oxygen-comprising gas stream over a moving catalyst bed which is introduced in the longitudinal direction of their reactor between two concentric cylindrical holding devices so as to leave a central interior space and an intermediate space between the moving catalyst bed and the interior wall of the reactor to give a reaction gas mixture, wherein the reactor has two or more reactor sections which are separated from one another by disk-shaped deflection plates arranged alternately in the central interior space and divided in subregions by annular deflection plates arranged in the intermediate space between the moving catalyst bed and the interior wall of the reactor, in each case with a mixing-in device which is located upstream of the moving catalyst bed in the flow direction of the reaction gas mixture and comprises the following elements: two or three rows arranged behind one
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: November 23, 2010
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Olbert, Franz Corr, Sven Crone
  • Patent number: 7811447
    Abstract: One exemplary embodiment can include a method of controlling a catalyst transfer vessel cycle of loading and unloading based on an expected level of a catalyst in a downstream vessel for a hydrocarbon conversion unit. The method can include calculating an expected catalyst level in the downstream vessel based on the unloading of the catalyst transfer vessel to adjust a setpoint to change the catalyst transfer vessel cycle of loading and unloading.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: October 12, 2010
    Assignee: UOP LLC
    Inventors: David J. Fecteau, Christopher Naunheimer
  • Patent number: 7655138
    Abstract: A system which circulates fluidizable solid particles through a fluidized bed reactor, a fluidized bed regenerator, and a fluidized bed reducer to thereby provide for substantially continuous desulfurization of a hydrocarbon-containing fluid stream and substantially continuous regeneration of the solid particles is disclosed.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: February 2, 2010
    Assignee: China Petroleum & Chemical Corporation
    Inventors: Victor G Hoover, Daniel T Fernald, Gwen J DeBrower
  • Patent number: 7632395
    Abstract: A method and apparatus for metering catalyst in a fluid catalytic cracking catalyst injection system are provided. In one embodiment, apparatus for metering catalyst in a fluid catalytic cracking catalyst injection system includes a low pressure storage vessel coupled to a pressure vessel that defines a high pressure side of the apparatus, where the determination of the amount of catalyst transferred is made on the low pressure side of the apparatus.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: December 15, 2009
    Assignee: Intercat Equipment, Inc.
    Inventor: Martin Evans
  • Patent number: 7534341
    Abstract: Method of metering at least one solid, particulate catalyst into a reactor containing a fluidized bed (11) of particles in an at least partly gaseous medium, in which the catalyst is metered discontinuously at prescribed time intervals into the fluidized bed (11) at at least one metering point (10). According to the present invention, a fluid stream is firstly introduced into the reactor (5) so that a region having a reduced particle density is formed in the fluidized bed (11) around the metering point (10) and the catalyst is subsequently metered into this region. As a result of the prior introduction of a fluid stream (“preblowing”) before the actual introduction of the catalyst, the catalyst can penetrate significantly deeper into the fluidized bed from the metering point due to the reduced particle density and is dispersed better.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: May 19, 2009
    Assignee: Basell Polyolefine GmbH
    Inventors: Rainer Karer, Kaspar Evertz, Peter Kölle, Hans-Jacob Feindt
  • Patent number: 7438863
    Abstract: The invention is a multi-catalyst injection system. In one embodiment, the system comprises a plurality of catalyst storage regions associated with a vessel and a metering device associated with the vessel. The metering device is configured to provide a metric indicative of an amount of catalyst dispensed from a selected one of the catalyst storage regions.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: October 21, 2008
    Assignee: Intercat Equipment, Inc.
    Inventor: Martin Evans
  • Patent number: 7399450
    Abstract: A fluidized-bed reactor is disclosed. The fluidized-bed reactor steadies the gas flow through the fluidized bed chamber of the reactor. The swirl chamber of the reactor consists of a conical housing in which a conical insert is also situated. This creates an annular gap between the housing and the insert, which acts as the swirl chamber and which, according to the geometry of the two components, causes a velocity of the gas flow which remains the same along the height, which increases or which decreases. Such a reactor can also be called a constant annular-gap reactor.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: July 15, 2008
    Inventor: Sebastian Zimmer
  • Patent number: 7368052
    Abstract: A process is disclosed for discharging and transferring upwardly fluidized particles from a dense fluidizing layer forming section to a high-velocity transferring section having a diameter which is smaller than that of the dense fluidizing fluidized layer forming section, wherein at least one intermediate cylindrical section is provided between the dense fluidizing fluidized layer forming section and the high-velocity transferring section. The process can decrease the degree of changes in the amount of particles to be discharged from the dense fluidizing layer forming section and transferred by the riser, thereby proving a stable and uniform transfer of the fluidized particles.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: May 6, 2008
    Assignee: Nippon Mitsubishi Oil Corporation
    Inventors: Yoneichi Ikeda, Yuichiro Fujiyama
  • Patent number: 7172685
    Abstract: A hydrocarbon desulfurization system employing regenerable solid sorbent particulates in a fluidized bed desulfurization reactor. The sulfur-loaded sorbent particulates are continuously withdrawn from the reactor and transferred to a regenerator. A novel solids transport mechanism provides for the safe and effective transfer of the sulfur-loaded sorbent particulates from the high pressure hydrocarbon environment of the reactor to the low pressure oxygen environment of the regenerator.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: February 6, 2007
    Assignee: Conocophillips Company
    Inventors: Max W. Thompson, Behzad Jazayeri, Robert Zapata, Manuel Hernandez
  • Patent number: 7141711
    Abstract: The present invention is a process for removing catalyst fines from a reactor effluent stream that has catalyst fines therein. The process comprises withdrawing the reactor effluent stream from the reactor. The reactor effluent stream is transported in a first conduit to a quench device and is quenched to form a quenched effluent stream and a liquid fraction containing a majority of the catalyst fines. The liquid fraction is transported in a second conduit to a solids separation device. The conditions under which the catalyst fines are moved prevent accumulation of catalyst fines in the catalyst fines process steps.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: November 28, 2006
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Cor F. Van Egmond, Richard E. Walter
  • Publication number: 20030192811
    Abstract: A hydrocarbon desulfurization system employing regenerable solid sorbent particulates in a fluidized bed desulfurization reactor. The sulfur-loaded sorbent particulates are continuously withdrawn from the reactor and transferred to a regenerator. A novel solids transport mechanism provides for the safe and effective transfer of the sulfur-loaded sorbent particulates from the high pressure hydrocarbon environment of the reactor to the low pressure oxygen environment of the regenerator.
    Type: Application
    Filed: April 11, 2002
    Publication date: October 16, 2003
    Inventors: Max W. Thompson, Behzad Jazayeri, Robert Zapata, Manuel Hernandez
  • Patent number: 6280609
    Abstract: A process and apparatus for contacting reactants with a particulate catalyst while indirectly contacting the reactants with a heat exchange medium performs heat exchange in a first reaction zone and moves catalyst, at least intermittently, through the second reaction zone while the process is operating. The first reaction zone is preferably a fixed bed reaction zone. The use of first reaction zone as a fixed bed reaction zone simplifies the process arrangement by not requiring means for catalyst movement in a reaction zone that performs simultaneous heat exchange. Long periods of operation are possible since the first reaction zone will typically experience a slow rate of catalyst deactivation and need infrequent regeneration. The first reaction zone may also be designed for catalyst movement, but independently controlled from the first reaction zone to facilitate the movement of catalyst therethrough.
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: August 28, 2001
    Assignee: UOP LLC
    Inventors: Bipin V. Vora, Raymond A. Pogliano
  • Patent number: 6010620
    Abstract: An arrangement for the controlled production of an essentially linear array of hydrocarbon feed injection jets maintains stable and reliable jets by passing individual piping for each jet through a support shroud that is located in a contacting vessel. Controlled atomization is provided by independently injecting a uniform quantity of gas medium into each of the plurality of uniformly created feed injection streams upstream of a discharge nozzle that separately discharges each mixed stream of hydrocarbons and gas medium into a stream of catalyst particles at or about the inner end of the support shroud. The feed injection jets are suitable for positioning in an inner location of large contacting vessel. Uniformity of distribution is obtained by dividing the hydrocarbons streams from an oil header into an individual oil conduit for each spray injection nozzle.
    Type: Grant
    Filed: November 11, 1997
    Date of Patent: January 4, 2000
    Assignee: UOP LLC
    Inventors: Daniel N. Myers, Aziz A. Sattar
  • Patent number: 5858210
    Abstract: A controlled method of changing the transport rate of particles between a source zone and a destination zone is disclosed. Changes are made in a desired value of the pressure difference of the conduit between the two zones through which the particles are transported. The changes are of a magnitude that are determined by the batchwise transfer of particles into the source zone and are performed at a rate that is determined by the dynamics of the process, rather than by the frequency of the batchwise transfers, until the desired final value of the pressure difference is reached. The method minimizes fluctuations in the pressures of the two zones without over-sized vessels or additional equipment that would otherwise be needed to accommodate pressure changes. This results in a savings in construction costs. This invention is adaptable to a multitude of processes for the catalytic conversion of hydrocarbons in which deactivated catalyst particles are regenerated.
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: January 12, 1999
    Assignee: UOP LLC
    Inventor: Larry D. Richardson
  • Patent number: 5840176
    Abstract: A method for replacing particles in a process that transfers particles is disclosed. This invention employs a seal zone which is in communication with two zones of the process and in which particles that are being added to the process are purged. This invention allows particles to be replaced without reducing the normal rate of particle transfer through the process, which results in a savings in downtime costs. This invention is adaptable to a multitude of processes for the catalytic conversion of hydrocarbons in which deactivated catalyst particles are regenerated.
    Type: Grant
    Filed: August 12, 1996
    Date of Patent: November 24, 1998
    Assignee: UOP LLC
    Inventors: Roger R. Lawrence, Frank T. Micklich, Charles T. Ressl, Paul A. Sechrist
  • Patent number: 5820747
    Abstract: A steam cracking process and facility is described which comprises injection of erosive powder to effect at least partial decoking of transfer line exchangers without interrupting the steam cracking stream. The powder, preferably injected just upstream of the transfer line exchangers (TLE) (4), is separated from the cracked gases in primary gas/solid separators (5), temporarily stored in receiving drums at a controlled temperature and evacuated to a common powder storage and/or treatment module by pneumatic transfer by means of a relatively low flow of uncondensable gas. The process and facility can be used to collect solid fragments generated by injection of chemical compounds which are catalysts for the gasification of coke by steam.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: October 13, 1998
    Assignees: Institut Francais du Petrole, Procedes Petroliers et Petrochimiques, Eric Lenglet
    Inventors: Eric Lenglet, Paul Broutin, Jean-Pierre Burzynski, Herve Cazor, Roland Huin
  • Patent number: 5716516
    Abstract: A system for transporting particulate material uses a combination of non-mechanical valves and pneumatic and gravity transport to reduce breakage of particulate material. This system is particularly useful for the conveyance of catalyst particles where a lift conduit raises the particles from a low elevation to a relatively higher elevation. A particular advantage of the arrangement is the elimination of pneumatic conveyance through elbows to reduce pressure drop and eliminate churning of catalyst particles. The elbows are replaced with an impactless flow diverter that uses gravity assisted conveyance to eliminate or minimize the attrition resulting from pneumatic conveyance.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: February 10, 1998
    Assignee: UOP
    Inventor: Frank T. Micklich
  • Patent number: 5614083
    Abstract: This FCC process suspends a layer of catalyst in a riser proximate or above the riser outlets. The density at the riser outlets is higher than the flowing density in the riser. The suspended catalyst provides a disengagement zone that enhances the separation of catalyst from product vapors. The riser operates in a manner that prevents any discharge of catalyst from its end. The arrangement also provides a convenient method for vetoing stripping vapors into a closed reactor cyclone system.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: March 25, 1997
    Assignee: UOP
    Inventor: Ismail B. Cetinkaya
  • Patent number: 5589057
    Abstract: This invention makes possible substantially continuous flow of uniformly distributed hydrogen and hydrocarbon liquid across a densely packed catalyst bed to fill substantially the entire volume of a reactor vessel by introducing the fluids as alternate annular rings of gas and liquid (i.e. a mixture of liquid hydrocarbon and a hydrogen-containing gas) at a rate insufficient to levitate or ebullate the catalyst bed. Catalyst are selected by density, shape and size at a design feed rate of liquids and gas to prevent ebullation of the packed bed at the design feed rates. The liquid and gas components of the hydrocarbon feed flow into the catalyst bed from concentric annular rings that are coaxial with the catalyst bed. At the desired hydrocarbon flow rate, such catalyst bed continually flows in a plug-like manner downwardly through the reactor vessel. Catalyst is removed on a periodic or semicontinuous basis by laminarly flowing catalyst particles in a liquid stream out of the bottom of the catalyst bed.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: December 31, 1996
    Assignee: Chevron U.S.A. Inc.
    Inventors: Harold J. Trimble, Brian A. Darsow
  • Patent number: 5549815
    Abstract: Disclosed is a method for fluidizing a dense phase bed of solid particles, preferably a method for fluidizing a dense phase bed of solid catalyst particles. The method includes the steps of continuously supplying a flowing fluid stream in a downward direction within an enclosed volume; contacting an upper surface of a dense phase bed of solid particles resting within the enclosed volume with the downward flowing fluid stream; continuously directing the flowing fluid stream into the dense phase bed of particles to form a continuous fluidized bed of solid particles within the enclosed volume; directing the flowing fluid stream in an upward direction after contacting the upper surface of the dense phase bed; and collecting the flowing fluid stream.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: August 27, 1996
    Assignee: Exxon Research and Engineering Company
    Inventor: William A. Wachter
  • Patent number: 5545312
    Abstract: A method and apparatus for replacing particles in a process that transfers particles is disclosed. This invention employs a seal zone which is in communication with two zones of the process and in which particles that are being added to the process are purged. This invention allows particles to be replaced without reducing the normal rate of particle transfer through the process, which results in a savings in downtime costs. This invention is adaptable to a multitude of processes for the catalytic conversion of hydrocarbons in which deactivated catalyst particles are regenerated.
    Type: Grant
    Filed: May 6, 1994
    Date of Patent: August 13, 1996
    Assignee: UOP
    Inventors: Roger R. Lawrence, Frank T. Micklich, Charles T. Ressl, Paul A. Sechrist
  • Patent number: 5512166
    Abstract: A process for the simultaneous replacement of a first catalyst by a second catalyst which first catalyst is circulating as a moving bed of solid particles in a hydrocarbon treating unit, which unit comprises at least one processing reactor. The first catalyst is withdrawn downstream of the reactor, or of each reactor, in the direction of catalyst circulation. The second catalyst is simultaneously injected upstream of the reactor or of each reactor. The bulk density of the material withdrawn downstream of the reactor, or of each reactor, is measured continuously. The withdrawal of the first catalyst and the injection of the second catalyst into the reactor concerned are interrupted when the bulk density so measured is equal to that of the second catalyst.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: April 30, 1996
    Assignee: Total Raffinage Distribution, S.A.
    Inventors: Patrice Herrenschmidt, Fran.cedilla.ois-Xavier Cormerais, Thierry Patureaux
  • Patent number: 5500110
    Abstract: A controlled method of changing the transport rate of particles between two zones is disclosed. Changes are made in a computed value of the pressure difference of the conduit between the two zones through which the particles are transported. The changes are of a predetermined magnitude and are performed at predetermined time intervals, until the desired final value of the pressure difference is reached. The method minimizes fluctuations in the pressures of the two zones without over-sized vessels or additional equipment that would otherwise be needed to accommodate pressure changes. This results in a savings in construction costs. This invention is adaptable to a multitude of processes for the catalytic conversion of hydrocarbons in which deactivated catalyst particles are regenerated.
    Type: Grant
    Filed: May 6, 1994
    Date of Patent: March 19, 1996
    Assignee: UOP
    Inventors: Paul A. Sechrist, Roger R. Lawrence, Frank T. Micklich, Larry D. Richardson, David M. Kazell
  • Patent number: 5348644
    Abstract: In a fluidized catalytic cracking (FLC) type unit for contacting of a hydrocarbon feedstock with hot solid particles in a fluidized bed in an upright tubular-type upflow hydrocarbon conversion reactor, there is provided, between the means for fluidization and the means for injection of the feedstock, a means for causing the fluidized phase at the periphery of the reactor to rotate about the axis of the reactor.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: September 20, 1994
    Assignee: Compagnie de Raffinage et de Distribution Total France
    Inventors: Pierre Maroy, Roben Loutaty, Thierry Patureaux
  • Patent number: 5290430
    Abstract: This FCC process suspends a catalyst and a riser proximate or above the riser cyclone inlets at a density that is higher than the flowing density in the riser. The suspended catalyst provides a disengagement zone that enhances the separation of catalyst from product vapors. The riser operates in a manner that prevents any discharge of catalyst from its end. The arrangement also provides a convenient method for venting stripping vapors into a closed reactor cyclone system.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: March 1, 1994
    Assignee: UOP
    Inventor: Ismail B. Cetinkaya
  • Patent number: 5246568
    Abstract: A process for making a lubricant oil of low pour point and improved oxidation stability by catalytically hydro-dewaxing a lube chargestock containing paraffin wax in a vertical column reactor having a cascade series of fixed downflow catalyst beds over dewaxing catalyst comprising acid medium pore size zeolite. The treatment is carried out by selectively hydrodewaxing paraffinic wax contained in the liquid petroleum in a first serial catalyst bed under adiabatic cracking temperature conditions while controlling adiabatic exothermal heat of reaction within a 30.degree. C. maximum excursion from the initial reaction temperature, thereby producing lighter olefinic components, recovering partially hydrodewaxed liquid petroleum from a bottom portion of the first serial catalyst bed, and redistributing said partially hydrodewaxed liquid petroleum for contact with said catalyst in at least one downstream fixed catalyst bed.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: September 21, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Thomas R. Forbus, Chwan P. Kyan
  • Patent number: 5188725
    Abstract: An improvement in iso-olefin etherification is obtained in an integrated process combining a fluidized catalytic cracking reaction and a fluidized catalyst etherification reaction wherein zeolite catalyst particles are withdrawn in partially deactivated form from the ether reaction stage and added as part of the catalyst in the FCC reaction.
    Type: Grant
    Filed: March 15, 1991
    Date of Patent: February 23, 1993
    Assignee: Mobil Oil Corporation
    Inventor: Mohsen N. Harandi
  • Patent number: 5021147
    Abstract: A system for adding and withdrawing solids to a high pressure reactor wherein there is provided improved control of flow and concentrations of a slurry of solids in a transport oil for introducing and withdrawing solids from the reactor. In addition, there is provided for improved heating and cooling of the solids.
    Type: Grant
    Filed: June 7, 1989
    Date of Patent: June 4, 1991
    Assignee: Abb Lummus Crest, Inc.
    Inventors: Roger P. Van Driesen, William R. Adams, Mario Baldasarri, John Caspers, Harold Trimble
  • Patent number: 4985136
    Abstract: A fluid catalytic cracking process wherein a hydrocarbon charge-stock is atomized and injected, in a contactor/reactor, into a vertical curtain of hot regenerated catalyst to vaporize and crack hydrocarbons in the charge-stock, wherein the catalyst preferably contains at least 40% by weight of a zeolitic cracking component and the contact time of the hydrocarbon vapors and the catalyst in the contactor/reactor is ultra-short, preferably not greater than 0.5 second.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: January 15, 1991
    Inventor: David B. Bartholic
  • Patent number: 4952306
    Abstract: A novel slurry hydrotreating process is described which employs a hydrotreating catalyst of small particle size having a quantity of catalyst sites in excess of those required for reaction and/or adsorption of nitrogen compounds in the petroleum or synfuel feed being treated. The excess catalyst sites can therefore in effect be contacted with a low nitrogen or essentially zero nitrogen feed, allowing rapid hydrogenation of aromatics at low temperatures where equilibrium is favored. In a further aspect of the invention, the catalyst which contains adsorbed nitrogen is activated by high temperature denitrogenation.
    Type: Grant
    Filed: September 22, 1989
    Date of Patent: August 28, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Willard H. Sawyer, Roby Bearden, Jr., Russell R. Chianelli, William E. Winter, Jr.
  • Patent number: 4923591
    Abstract: Process for the continuous catalytic dewaxing of lube containing feeds wherein the feed effectively moves countercurrently to the catalyst. The process is based on the discovery that in a two-stage catalytic dewaxing process the stage-two or back-end dewaxing catalyst shows a concave upward aging when it is used to produce a targeted pour point lube, but the back-end dewaxing catalyst can be used as a stage one or front-end dewaxing catalyst to produce an intermediate pour point product.
    Type: Grant
    Filed: January 4, 1988
    Date of Patent: May 8, 1990
    Assignee: Mobil Oil Corporation
    Inventors: Kenneth R. Graziani, James R. Katzer, Chwan P. Kyan
  • Patent number: 4875995
    Abstract: A system for adding and withdrawing solids to a high pressure reactor wherein there is provided improved control of flow and concentrations of a slurry of solids in a transport oil for introducing and withdrawing solids from the reactor. In addition, there is provided for improved heating and cooling of the solids.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: October 24, 1989
    Assignee: Lummus Crest, Inc.
    Inventors: Roger P. Van Driesen, William R. Adams, Mario Baldasarri, John Caspers, Harold Trimble
  • Patent number: 4872969
    Abstract: A method and apparatus are provided for controlling the transfer of particles between zones of different pressure using particle collection and particle transfer conduits. The solids are moved from a low pressure zone to a high pressure zone by means of a valveless lock hopper system that vents all of the gas from the collection zones through the particle collection conduits. Venting gas from the collection zones through the transfer conduits prevents erosion of control valves and eliminates the need for filters which are prone to clogging. The venting of gas is accomplished by varying the size of the transfer conduits between zones. The invention is particularly applicable in the regeneration of catalyst used in hydrocarbon conversion processes such as catalytic reforming.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: October 10, 1989
    Assignee: UOP
    Inventor: Paul A. Sechrist
  • Patent number: 4859315
    Abstract: A continuous fluidized process for upgrading a heavy liquid hydrocarbon charge-stock containing solid or solid-forming contaminants, e.g., inorganic solids, metals and asphaltenes. The charge is atomized to provide a stream of liquid particles introduced horizontally into a horizontal contacting zone to contact a vertical curtain of fluidized hot solid particles so as to vaporize hydrocarbons in the charge without substantial cracking, the solid particles being solely derived from the contaminants in the charge. The mixture of hydrocarbon vapors and solid particles are rapidly separated, carbon is burned from the separated particles, and the resulting hot solid particles are recycled to the contacting zone. The hydrocarbon vapors are condensed and there is recovered a liquid product having a substantially reduced content of contaminants.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: August 22, 1989
    Inventor: David B. Bartholic
  • Patent number: 4824557
    Abstract: The present invention relates to a process for immediately and intimately mixing a fluidizable cracking catalyst with a fluid hydrocarbon in a riser reactor. The process involves passing the hydrocarbon through a stationary fluid feedstock feed means in fixed relationship with the upstream end of the riser. The feedstock is atomized by a nozzle attached to the downstream end of the feed means. A hollow plug valve positioned concentrically around the feed means is capable of moving in a reciprocating fashion to permit the flow of catalyst to the riser.
    Type: Grant
    Filed: August 28, 1987
    Date of Patent: April 25, 1989
    Assignee: Amoco Corporation
    Inventors: Robert R. Cartmell, Carl J. Horecky