Purging Patents (Class 208/150)
  • Patent number: 10626524
    Abstract: A vortex tube system for conditioning and blending fibrous material utilizing a helical inlet to the base of a central vortex tube, to condition and blend fibers in a fluidly conveyed stream, and to separate the fibers from debris, by abruptly changing direction of the conveying air flow. The vortex tube system for conditioning and blending combines the helical input with helical shaping of the air flow through the central vortex tube to induce greater dynamics which is continued at the top of the vortex tube through a separate drying chamber.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: April 21, 2020
    Assignee: Lummus Corporation
    Inventors: Mark David Cory, Joseph W. Thomas
  • Patent number: 10487279
    Abstract: The present invention relates to a process of increasing syngas production during an upgradation process of petroleum residual oil by circulation of rejuvenated upgrading material through a heat removal zone such as an Auxiliary Reformer and by regeneration of spent upgrading material.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: November 26, 2019
    Assignee: Indian Oil Corporation Limited
    Inventors: Gadari Saidulu, Sadhullah Mukthiyar, Sayapaneni Gopinath Bhanuprasad, Vineeth Venu Nath, Doosa Hima Bindu, Satheesh Vetterkunnel Kumaran, Debasis Bhattacharyya, Brijesh Kumar, Biswapriya Das
  • Patent number: 10393374
    Abstract: A process for the incineration of activated coal-supported PGM catalysts, the process comprising a joint incineration of a multilayer arrangement, wherein the multilayer arrangement includes (i) a top layer of particulate activated coal-supported PGM catalyst, (ii) a layer of coarse charcoal located beneath said top layer and, optionally, (iii) a layer of particulate coke located beneath the charcoal layer, and wherein an upward flow of oxidizing gas is homogeneously passed through said multilayer arrangement during the incineration.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: August 27, 2019
    Assignees: HERAEUS DEUTSCHLAND & GMBH & CO. KG, HERAEUS PRECIOUS METALS NORTH AMERICA LLC
    Inventors: Brian Peters, Chris Hobbs, Todd England, Jimmy Taylor, Holger Winkler, Bernhard Bauer-Siebenlist
  • Patent number: 10376834
    Abstract: The invention relates to a continuous process for purifying a gas containing 60-99 percent SO2 (sulfur dioxide) by volume and 1 to 40 percent steam by volume, followed by synthesis of SO3 (sulfur trioxide) without first drying the gas, and to an apparatus for carrying out said method.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: August 13, 2019
    Assignee: CHEMETICS INC.
    Inventors: Torsten Weber, Bernd Erkes, Lucia Fernandez Lopez
  • Patent number: 10139323
    Abstract: An apparatus for separating micro-particles includes a channel through which a fluid flows, and a separating part protruding into the channel and including a slanted element inclined toward a length direction of the channel and a vertical element perpendicular to the length direction of the channel.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: November 27, 2018
    Assignees: SAMSUNG ELECTRONICS CO., LTD., UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Minseoks Kim, Sungyoung Choi
  • Patent number: 10016723
    Abstract: The present invention relates to a method for the catalytic removal of sulfur dioxide from waste gases in two reactors, wherein the first reactor is charged with an activated carbon catalyst. The method comprises: a. provision of a waste gas with a water content of less than 1 g H2O/Nm3 and an SO2 content of at least 5 ppm, b. introduction of the waste gases into a first reactor, c. catalytic conversion of the SO2 into gaseous SO3 in the first reactor by the activated carbon catalyst, wherein catalytic conversion on the activated carbon catalyst proceeds at a temperature of below 100° C., d. introduction of the prepurified waste gases from the first reactor into a second reactor, e. conversion of the SO3 with water into H2SO4 in the second reactor.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: July 10, 2018
    Assignee: CPPE CARBON PROCESS & PLANT ENGINEERING S.A.
    Inventor: Alain Strickroth
  • Patent number: 9446369
    Abstract: Apparatuses and processes are provided for stripping gaseous hydrocarbons from particulate material. One process comprises the step of contacting particles containing hydrocarbons with a stripping vapor in countercurrent flow to remove at least a portion of the hydrocarbons with the stripping vapor to form stripped particles. Contacting the particles includes advancing the particles down a sloping element of a structured packing toward a reinforcing rod that is disposed along a lower channel portion of the sloping element. The particles are advanced over the reinforcing rod. The particles are contacted with the stripping vapor that is rising up adjacent to the lower channel portion.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: September 20, 2016
    Assignee: UOP LLC
    Inventors: Erick D. Gamas-Castellanos, Mitchell J. Kowalczyk
  • Patent number: 9309467
    Abstract: Disclosed is a combination process for improved hydrotreating and catalytic cracking of hydrocarbon oils, including: contacting residual oil, catalytic cracking cycle oil, and optional distillate oil with a hydrotreating catalyst under hydrotreating conditions in the presence of hydrogen followed by separation of the reaction products to obtain gas, hydrogenated naphtha, hydrogenated diesel oil, and hydrogenated tail oil; contacting the hydrogenated tail oil and optional normal catalytic cracking feedstock oil with a cracking catalyst under catalytic cracking conditions followed by separation of the reaction products to obtain dry gas, hydrogenated naphtha, liquefied petroleum gas, catalytic cracked gasoline, catalytic cracked diesel oil, and catalytic cracking cycle oil; wherein the hydrogenated tail oil and/or normal catalytic cracking feedstock oil are separated into at least two fractions, the light and the heavy fractions or normal catalytic cracking heavy feedstock oil and normal catalytic cracking ligh
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: April 12, 2016
    Assignees: China Petroleum and Chemical Corp., Research Institute of Petroleum Processing, Sinopec
    Inventors: Yongcan Gao, Chaogang Xie, Chuanfeng Niu, Jiushun Zhang, Lishun Dai, Hong Nie, Dadong Li, Jun Long, Jianguo Ma, Yan Cui
  • Patent number: 9260667
    Abstract: Disclosed is a combination process for improved hydrotreating and catalytic cracking of hydrocarbon oils, including: contacting residual oil, catalytic cracking cycle oil, and optional distillate oil with a hydrotreating catalyst under hydrotreating conditions in the presence of hydrogen followed by separation of the reaction products to obtain hydrogenated tail oil and other products; contacting the hydrogenated tail oil and optional normal catalytic cracking feedstock oil with a cracking catalyst under catalytic cracking conditions followed by separation of the reaction products; wherein the hydrogenated tail oil and/or normal catalytic cracking feedstock oil are separated into at least two fractions prior to contacting the hydrogenated tail oil and/or normal catalytic cracking feedstock oil with the cracking catalyst.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: February 16, 2016
    Assignees: China Petroleum & Chemical Corporation, Research Institute of Petroleum Processing, Sinopec
    Inventors: Yongcan Gao, Chaogang Xie, Chuanfeng Niu, Jiushun Zhang, Lishun Dai, Hong Nie, Dadong Li, Jun Long, Jianguo Ma, Yan Cui
  • Patent number: 8999146
    Abstract: Hydrocarbon feed to a catalytic reactor can be heat exchanged with flue gas from a catalyst regenerator. This innovation enables recovery of more energy from flue gas thus resulting in a lower flue gas discharge temperature. As a result, other hot hydrocarbon streams conventionally used to preheat hydrocarbon feed can now be used to generate more high pressure steam.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: April 7, 2015
    Assignee: UOP LLC
    Inventors: Yunbo Liu, Xin X. Zhu, Daniel N. Myers, Patrick D. Walker
  • Patent number: 8383051
    Abstract: The present invention provides a compact riser separation system for Fluid Catalytic Cracking reactors possessing an external riser system wherein the riser enters the reactor from outside the reactor vessel.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: February 26, 2013
    Assignee: Stone & Webster Process Technology, Inc.
    Inventors: Eusebius Anku Gbordzoe, Chris Robert Santner
  • 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: 8273937
    Abstract: Methods for producing in a reactor natural gas from heavy hydrocarbons. A mixture of heavy hydrocarbons and a catalyst comprising a transition metal are heated under an anoxic condition in a reactor. Natural gas, e.g., catalytic natural gas, is generated from the heavy hydrocarbons by a disproportionation reaction promoted by the catalyst. The anoxic condition can be created by flowing an anoxic stimulation gas in the reactor.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: September 25, 2012
    Assignee: Petroleum Habitats, LLC
    Inventor: Frank D. Mango
  • Patent number: 8192614
    Abstract: Apparatus and method are provided for separating and stripping suspensions comprising catalyst particles transported in vapors from the fluid catalytic cracking riser/reactor. Particles are disentrained from vapor in a vortex zone 112 of the primary cyclonic separator 100. The disentrained particles enter a stripping zone 126, wherein the particles are contacted with a stripping gas 136 to recover vapors entrained and adsorbed onto the catalyst. The stripping gas 136 enters stripping zone 126 via perforations in the wall of the cyclone 100. The stripping gas 136 limits the residual catalytic conversion of hydrocarbon vapors and formation of delta-coke on the catalyst. Stripped catalyst is delivered from the cyclone stripping zone 126 via a dipleg 130 connected to a bottom of the cyclone 100, and enters an FCC stripping vessel. Solids-lean stripping gas and vapors from the catalyst particles are blended with the carrier fluid and discharged from the cyclone.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: June 5, 2012
    Assignee: Kellogg Brown & Root LLC
    Inventors: Phillip Kent Niccum, Iwan Hirsan Chan, Richard Brian Miller, Steven Arthur Tragesser
  • Patent number: 8062507
    Abstract: A process for stripping gases from catalyst material in which catalyst travels down baffles at a first acute angle and then at a second acute angle on the same baffle. Traveling down the baffle at the second angle assures the catalyst will cross a downcomer channel and land on an adjacent baffle.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: November 22, 2011
    Assignee: UOP LLC
    Inventors: Jason P. Lambin, Keith A. Couch, Paolo Palmas, Giovanni Spinelli
  • Patent number: 7972565
    Abstract: An apparatus for stripping gases from catalyst material comprises baffles having a second face that extends toward a downcomer channel between baffles to spread catalyst out on adjacent baffles for better contact with stripping gas.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: July 5, 2011
    Assignee: UOP LLC
    Inventors: Jason P. Lambin, Keith A. Couch, Paolo Palmas, Giovanni Spinelli
  • Patent number: 7771585
    Abstract: The system of the present invention includes a centripetal cyclone for separating particulate material from a particulate laden gas solids stream. The cyclone includes a housing defining a conduit extending between an upstream inlet and a downstream outlet. In operation, when a particulate laden gas-solids stream passes through the upstream housing inlet, the particulate laden gas-solids stream is directed through the conduit and at least a portion of the solids in the particulate laden gas-solids stream are subjected to a centripetal force within the conduit.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: August 10, 2010
    Assignee: Southern Company
    Inventors: Pannalal Vimalchand, Guohai Liu, WanWang Peng
  • Patent number: 7351326
    Abstract: Thermal cracking in a riser cracking, closed cyclone, fluidized catalytic cracking process is reduced. A snorkel or flow conduit having an inlet just above the catalyst stripper moves stripper vapor into the closed cyclone. The system preferably operates without a stripper cap, relying on fluid dynamics to isolate stripper vapor from upper parts of the vessel containing the riser outlet. Preferably the snorkel is at least partially supported by, and ideally is inside, the primary cyclone dipleg. Reduced residence time of stripper vapor in the vessel containing the stripper and the closed cyclone system reduces thermal cracking of stripper vapor.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: April 1, 2008
    Inventor: Hartley Owen
  • Patent number: 7118715
    Abstract: A baffle-style stripper for an FCC process comprising sloped baffles in which a greater volumetric flow rate of stripping medium permeates openings in a bottom section of the baffle than through a top section of the baffle for low catalyst flux stripping operations. When low catalyst flux is used, the catalyst runs from baffle to baffle closer to the bottom edge of the baffle. Hence, more fluidization from stripping medium is concentrated near the lower edge of the baffle. The greater fluidization at the bottom section of the baffle is accomplished by providing greater opening area per baffle area in the lower section of the baffle than in the top section of the baffle.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: October 10, 2006
    Assignee: UOP LLC
    Inventors: Brian W. Hedrick, Thuy Khanh T. Nguyen
  • Patent number: 7022221
    Abstract: An FCC apparatus uses a cantilevered support for supporting baffles in a stripping vessel. Only one end of the support is fastened to a wall of a contacting conduit or a wall of the stripping vessel and the other end is spaced apart from the near wall of the contacting conduit or the stripping vessel. The arrangement provides for easier maintenance and accommodates differential thermal expansion.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: April 4, 2006
    Assignee: UOP LLC
    Inventor: Brian W. Hedrick
  • Publication number: 20040251167
    Abstract: A system for cleaning particulate solids contaminated with hydrocarbons and water includes a preheating feed auger (12), a first separator (14) which comprises an auger (26) and a heat source, a first vapour collection and condensation system, a second separator (30) which comprises an auger (26) and a heat source which accepts the solids from the first separator and operates at a higher temperature, and a second vapour collection and condensation system. The system is particularly useful for cleaning solids obtained from drilling mud, which solids are mixed with water and diesel.
    Type: Application
    Filed: August 16, 2004
    Publication date: December 16, 2004
    Inventors: Earl Gingras, LeRoy Ness, Norman Arrison
  • Patent number: 6780308
    Abstract: A baffle-style stripper for an FCC process comprising sloped baffles in which a greater volumetric flow rate of stripping medium permeates openings in a bottom section of the baffle than through a top section of the baffle for low catalyst flux stripping operations. When low catalyst flux is used, the catalyst runs from baffle to baffle closer to the bottom edge of the baffle. Hence, more fluidization from stripping medium is concentrated near the lower edge of the baffle. The greater fluidization at the bottom section of the baffle is accomplished by providing greater opening area per baffle area in the lower section of the baffle than in the top section of the baffle.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: August 24, 2004
    Assignee: UOP LLC
    Inventors: Brian W. Hedrick, Thuy Khanh T. Nguyen
  • Patent number: 6740227
    Abstract: A baffle-style stripper for an FCC process having a complete or nearly complete coverage of stripping openings over the sloped surface of the baffle will provide improved stripping efficiency and catalyst flux through the stripper. The complete distribution of relatively small openings over the entire surface of a sloped baffle has been found to interrupt relatively dense streamers of catalyst that were previously not known to exist and which short-circuited the contact of the stripping fluid with the catalyst. Spreading out the stripping gas across the sloped area of the baffle to a much greater extent than has been practiced in the past has now been found to promote active contacting of the catalyst with the stripping fluid over the entire volume of the stripper between the baffles.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: May 25, 2004
    Assignee: UOP LLC
    Inventor: Brian W. Hedrick
  • Patent number: 6723227
    Abstract: Fluidized catalytic cracking process which process comprises: (a) separating the hydrocarbon product from the spent catalyst by means of one or more gas-solid separation steps; (b) stripping the spent catalyst in a dense phase fluidized stripping zone by introducing a stripping medium in the lower portion of the stripping zone; (c) introducing part of the spent catalyst obtained in step (b) to a regeneration zone wherein the coke is removed from the catalyst by means of combustion; (d) introducing the remaining part of the spent catalyst and part of the hot regenerated catalyst into a lower portion of an elongated dilute phase stripping zone; (e) introducing a stream of a stripping medium into the lower portion of the dilute phase stripping zone to contact the resulting mixture of spent catalyst and regenerated catalyst therein; (f) passing a stream of the spent catalyst mixed with the hot regenerated catalyst and stripping medium in the dilute phase stripping zone; (g) introducing the separated catalyst of s
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: April 20, 2004
    Assignee: Shell Oil Company
    Inventor: Rene Samson
  • Patent number: 6652736
    Abstract: The invention concerns a stripping method for extracting solid fluidized particles whereby the particles to be stripped are subjected to a first stripping in a first chamber (9), then at least a second stripping in a second chamber (10) wherein are provided solid/gas separating means allowing the gaseous fluids derived from the second stripping to directly pass through from the bottom to the top but preventing them from going up again into the first chamber (9). The invention also concerns a device for implementing said method.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: November 25, 2003
    Assignee: Total Raffinage Distribution S.A.
    Inventors: Mariano Del Pozo, Tanneguy Descazeaud, Daniel Barthod
  • Patent number: 6458265
    Abstract: A diesel fuel having at least 50% C10 to C20 paraffins, wherein the iso-paraffin to normal paraffin mole ratio is up to 21:1 and higher. This diesel fuel can be produced from a feed containing at least 90% C10+ normal paraffins. This diesel fuel is produced by contacting a feed in an isomerization reaction zone a feed with a catalyst comprising a SAPO-11 and platinum in the presence of hydrogen (hydrogen:feed ratio of from 1,000 to 10,000 SCFB) at a temperature of from 340° C. to 420° C., a pressure of from 100 psig to 600 psig, and a liquid hourly space velocity of from 0.1 hr−1 to 1.0 hr−1.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: October 1, 2002
    Assignee: ChevronTexaco Corporation
    Inventors: Stephen J. Miller, Arthur John Dahlberg, Kamala R. Krishna, Russell R. Krug
  • Publication number: 20020011428
    Abstract: A method, and a reactor, for hydroprocessing a hydrocarbon feed stream through multistage moving catalyst beds contained within a single onstream reactor vessel, with separate catalyst addition and withdrawal systems for each of the multistages of moving catalyst beds. The reactor contains two or more different and distinct moving catalyst beds for any hydroprocessing application. The method includes serially passing, without leaving the reactor vessel, at least a partially treated hydrocarbon stream from one hydroconversion reaction zone containing a moving catalyst bed with a first set of catalytic characteristics to another hydroconversion reaction zone containing a moving catalyst bed with a second set of catalytic characteristics that differ in catalytic abilities from the first set of catalytic characteristics.
    Type: Application
    Filed: February 10, 1999
    Publication date: January 31, 2002
    Inventor: GEORGIEANNA L. SCHEUERMAN
  • Publication number: 20020008052
    Abstract: A baffle-style stripper for an FCC process having a complete or nearly complete coverage of stripping openings over the sloped surface of the baffle will provide improved stripping efficiency and catalyst flux through the stripper. The complete distribution of relatively small openings over the entire surface of a sloped baffle has been found to interrupt relatively dense streamers of catalyst that were previously not known to exist and which short-circuited the contact of the stripping fluid with the catalyst. Spreading out the stripping gas across the sloped area of the baffle to a much greater extent than has been practiced in the past has now been found to promote active contacting of the catalyst with the stripping fluid over the entire volume of the stripper between the baffles. As an added benefit, more complete coverage by the stripper openings also prevents choking of stripper flow by the restriction of stripping gas flow to narrow open areas between the sloped baffles.
    Type: Application
    Filed: December 21, 2000
    Publication date: January 24, 2002
    Inventor: Brian W. Hedrick
  • Publication number: 20010027938
    Abstract: A baffle-style stripping arrangement for an FCC process having substantially horizontal stripping baffles is disclosed. The stripping baffles comprise a perforated section and a downcomer section which generates transverse movement of catalyst across the baffle to ensure adequate vertical movement of stripping media. The perforated section is covered with stripping openings to provide improved stripping efficiency and catalyst flux through the stripping vessel. The perforated section may comprise a grate. Baffles may also include an imperforate section which is vertically aligned with a downcomer section of a superjacent baffle.
    Type: Application
    Filed: June 8, 2001
    Publication date: October 11, 2001
    Inventors: Jeffrey P. Koebel, Brian W. Hedrick, Kalidas Puppala
  • Patent number: 6010618
    Abstract: An FCC process provides ultrashort catalyst and feed contacting in an FCC riser by recovering a short contact product stream in an intermediate section of the riser. The remainder of the catalyst and gas mixture continues through the riser along a continuous flow path for further for controlled cracking of the heavier adsorbed hydrocarbons and entrained hydrocarbons. Residual catalyst separated from the recovery of the short contact product stream returns to the upstream end of the riser for recycle. The section of the riser downstream of the short contact product recovery may receive additional feed to perform secondary cracking reactions. The riser arrangement greatly simplifies methods for performing ultra short FCC feed and catalyst contacting.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: January 4, 2000
    Assignee: UOP LLC
    Inventor: David A. Lomas
  • Patent number: 5910240
    Abstract: An improved stripper section design is provided for use in fluid catalytic cracking (FCC) units. The stripper section contains means for imparting rotational movement to the FCC cracking catalyst as it traverses the stripping section. In one embodiment the stripper section contains at least one rotation vane that is preferably disposed on the surface of a stripper section tray. The rotation vane provides angular, rotational movement to the cracking catalyst as it traverses the stripper section. Vertical movement is imparted to the cracking catalyst due to gravity and radial movement is imparted to the catalyst due to the slanted nature of the tray. Through the use of the rotation vanes the contact between the catalyst particles and the stripping steam is increased, thereby improving the overall efficiency of the FCC operation.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: June 8, 1999
    Assignee: Mobil Oil Corporation
    Inventors: Richard C. Senior, Christopher G. Smalley, Timothy P. Holtan
  • Patent number: 5868922
    Abstract: A FCC process in which spent catalyst is stripped of hydrocarbon in a stripping zone prior to entering the regenerator. In order to maximize the amount of strippable hydrocarbon removed in the stripping zone with minimal use of stripping gas, a sample of spent catalyst is removed prior to entering the regenerator. The spent catalyst is analyzed for strippable hydrocarbon by conducting the sample to a heated catalyst collection vessel, evacuating the catalyst, collecting the gases from the collection vessel and analyzing the gases for amount of strippable hydrocarbon on the spent catalyst.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: February 9, 1999
    Assignee: Exxon Research and Engineering Company
    Inventors: James P. Glass, Jr., George A. Swan
  • Patent number: 5863417
    Abstract: A FCC process in which spent catalyst is stripped of hydrocarbon in a stripping zone prior to entering the regenerator. In order to maximize the amount of strippable hydrocarbon removed in the stripping zone, a sample of spent catalyst is removed prior to entering the regenerator. The spent catalyst is analyzed for strippable hydrocarbon by conducting the sample to a heated catalyst collection vessel, stripping hydrocarbon from the catalyst using an inert stripping gas, oxidizing the gasses from the collection vessel to carbon dioxide and water, and measuring the amount of carbon dioxide and/or water which amount of carbon dioxide and/or water can be correlated to the amount of strippable hydrocarbon on the catalyst sample.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: January 26, 1999
    Assignee: Exxon Research and Engineering Company
    Inventors: Richard A. Demmin, James P. Glass, Jr.
  • Patent number: 5853568
    Abstract: A fluid cat cracking process for catalytically cracking a feed containing vanadium into lower boiling products, includes a cat cracker and a regenerator, with the feed entering the catalytic cracking zone preheated by indirect heat exchange with spent, stripped catalyst particles being recycled from the cracking reactor to the regenerator. Operating the regenerator at a temperature no higher than about 1150.degree. F. permits the amount of vanadium in the feed to be substantially increased with no loss of catalytic activity due to vanadium poisoning of the catalyst, when compared to a higher regenerator temperature of 1365.degree. F. Using the stripped, spent catalyst for heating the feed reduces feed coking and heat exchanger fouling, compared to using the hotter regenerated catalyst for feed preheat.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: December 29, 1998
    Assignee: Exxon Research and Engineering Company
    Inventor: John F. R. Brander
  • Patent number: 5846402
    Abstract: A process for selective catalytic cracking of a petroleum-based feedstock to produce a product having a high yield of liquified petroleum gas (LPG) and light olefins having 3 to 4 carbons includes providing a fluidized bed reactor which is a high velocity riser, continuously circulating fluidized bed reactor; providing a solid acidic catalyst comprised of: from 1 to 6% by wt. of ultra stable Y-zeolite; from 8-25% by wt. of Pentasil zeolite which is shape selective; from 0-8% by wt. of an active material which is bottom selective; from 0-1% by wt. of rare earth constituents; and from 91 to 60% by wt. of nonacidic constituents and binder; charging the fluidized bed reactor with the solid acidic catalyst and the petroleum-based feedstock; and cracking the petroleum-based feedstock in the presence of the solid acidic catalyst in the fluidized bed reactor. The reactor is operated at a Weight Hourly Space Velocity (WHSV) ranging from 40 to 120 hr.sup.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: December 8, 1998
    Assignee: Indian Oil Corporation, Ltd.
    Inventors: Sukumar Mandal, Suresh Kumarshah, Debasis Bhattacharyya, Vutukuru Lakshmi Narasimha Murthy, Asit Kumar Das, Sanjeev Singh, Ram Mohan Thakur, Shankar Sharma, Jagdev Kumar Dixit, Sobhan Ghosh, Satyen Kumar Das, Manoranjan Santra, Latoor Lal Saroya, Marri Rama Rao, Ganga Shanker Mishra, Satish Makhija
  • Patent number: 5702589
    Abstract: Disclosed is a process for converting olefinic hydrocarbons using spent FCC catalysts which comprises using spent FCC catalysts, optionally containing spent FCC additives, in the reactor/stripper part of the FCCU, instead of or in addition to a separate olefin upgrader, to upgrade C.sub.2 -C.sub.8 oligomerizable olefins, preferably propylene and ethylene, into C.sub.4 /C.sub.5 olefins and isoparaffins as well as gasoline, wherein feedstock can be product streams of the FCCU containing propylene/ethylene such as, for example, the absorber and depropanizer overheads.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: December 30, 1997
    Assignee: ABB Lummus Global Inc.
    Inventors: Chih-Hao Mark Tsang, Randall Hughes Petty, Glenn Allen Clausen, Charles Henry Schrader
  • Patent number: 5665949
    Abstract: A process for separating catalyst particles in the catalytic cracking of reacted hydrocarbons includes feeding the reacted hydrobarbons to an unconfined cyclone device made up of a diplegless cyclone opening directly into a large volume separator vessel downwardly through a mouth and upwardly through the annular space between concentric pipes. The concentric pipes are connected to the other components of the system as well as the hydrocarbon fluid catalytic cracking process carried out in the system.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: September 9, 1997
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: Jose Mozart Fusco, Jose Geraldo Furtado Ramos, Valmor Neves Vieira, Eduardo Cardoso de Melo Guerra
  • Patent number: 5584985
    Abstract: In this invention a cyclonic separation method and apparatus discharges particulate solids and gaseous fluids into a separation vessel from a discharge opening of a central conduit and withdraws separated gaseous fluids from the separation vessel that contacts the catalyst in the separation vessel with redistributed gases from outside the separation vessel. The invention increases the effective utilization of available stripping medium in an FCC process.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: December 17, 1996
    Assignee: UOP
    Inventor: David A. Lomas
  • Patent number: 5584986
    Abstract: A fluidized process which comprises contacting a hydrocarbon feedstock with a fluidized particulate solid in a contacting zone wherein carbonaceous deposits accumulate on the solid and the solid becomes spent and wherein the carbonaceous deposits are burned from the spent solid to produce a regenerated solid; removing a stream of the fluidized spent solid and entrained hydrocarbons from the contacting zone; introducing the fluidized spent solid/entrained hydrocarbon stream and a stream of hot regenerated solid into a lower portion of a zone; introducing a stream of a fluid stripping medium, e.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: December 17, 1996
    Assignee: Bar-Co Processes Joint Venture
    Inventor: David B. Bartholic
  • Patent number: 5549814
    Abstract: An FCC stripper uses a grid arrangement that provides increased contacting of stripping fluid and catalyst through multiple levels of stripping grids while using a configuration that permits access through the stripper vessel for maintenance and inspection. The invention is particularly suited for large diameter stripping vessels where the typical frusto-conical configuration of baffles greatly increases the length of the stripper. The stripper grids also have orifice openings to redistribute stripping fluid at each level of stripping grid and increase contact between catalyst and stripping fluid.
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: August 27, 1996
    Assignee: UOP
    Inventor: Randy J. Zinke
  • Patent number: 5531884
    Abstract: A fluidized catalytic cracking (FCC) process and apparatus uses a catalyst stripper with slant trays or shed trays having "downcomers". Downcomers, vertical catalyst/gas contacting elements, provide a vertical, countercurrent region for catalyst/stripping vapor contact. The downcomers improve stripping effectiveness.
    Type: Grant
    Filed: August 3, 1994
    Date of Patent: July 2, 1996
    Assignee: Mobil Oil Corporation
    Inventors: David L. Johnson, Richard C. Senior
  • Patent number: 5474669
    Abstract: A side-by-side reactor vessel and stripping vessel arrangement uses a rejection vessel to collect the catalyst from the bottom of a reactor vessel and eliminate stagnant layers of catalyst within the reactor vessel while increasing the efficiency of a stripper vessel located to the side of the reactor. Catalyst containing entrained and sorbed hydrocarbons pass from the bottom of a reactor vessel into the small diameter rejection vessel that provides a hydrocarbon rejection zone and uses a fresh stripping medium to maintain a dense fluidized bed from which entrained hydrocarbons are quickly disengaged from the catalyst and travel upward into the reactor vessel. Partially stripped catalyst flows through a passageway that extends horizontally to a stripping vessel that contains a conventional stripping zone. In the stripping vessel, catalyst counter-currently contacts additional stripping medium which removes sorbed hydrocarbons from the catalyst surface.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: December 12, 1995
    Assignee: UOP
    Inventor: Ismail B. Cetinkaya
  • Patent number: 5430222
    Abstract: An apparatus for the catalytic cracking in the fluid state of hydrocarbon feedstocks which comprises a riser-type column (2); at the top of the riser (2) and concentric therewith, a chamber (1) for separation of the hydrocarbon vapors and the coke-laden catalyst particles; directly above the upper opening of the riser (2) and in the interior of said chamber (1), a ballistic separator (3); at least one unit for regeneration of the spent catalyst, fed by stripped particles received from said chamber. The chamber (1) for separation of the coke-laden catalyst particles and the stripping thereof comprises, at a level intermediate between the bed (6) of particles being stripped and the opening of the riser (2), a means (11) adapted to form a baffle for locally reducing the diameter of said chamber (1) and the free passage at the periphery of the riser (2), thereby reducing recirculating streams of hydrocarbon vapors in separation chamber (1) of the FCC unit thus avoiding overcracking.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: July 4, 1995
    Assignee: Total Raffinage Distribution S.A.
    Inventors: Marc Fersing, Denis Pontvianne
  • Patent number: 5389231
    Abstract: A catalytic cracking process and apparatus wherein hot regenerated catalyst particles from the dense phase of the regenerator are passed through a heat exchanger in indirect heat exchange with stripped catalyst particles whereby the former are cooled and the latter are heated. The regenerated catalyst which contacts the feed is thus cooler than it would otherwise be, and there is a reduction in thermal cracking. The stripped catalyst entering the regenerator is hotter than it would otherwise be thereby improving the efficacy of the regeneration step.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: February 14, 1995
    Assignee: Exxon Research and Engineering Company
    Inventors: John F. R. Brander, Todd R. Steffens
  • Patent number: 5380426
    Abstract: A fluidized catalytic cracking process and apparatus with an active bed annular spent catalyst stripper is disclosed. An annular catalyst stripper disposed about a riser reactor is separated, by a baffle or fluid flow, into a secondary stripper nearer the catalyst regenerator and a primary stripper on the far side of the annular stripper from the regenerator. Catalyst flows through the primary stripper as a dense bed, to a transport means which lifts catalyst to the inlet of the secondary stripper. The "dead" region on side of annular strippers far from the regenerator is eliminated. Preferably catalyst is added to the primary stripper via cyclone diplegs, and a cyclone is used on the transport outlet.
    Type: Grant
    Filed: September 27, 1993
    Date of Patent: January 10, 1995
    Assignee: Mobil Oil Corporation
    Inventors: David L. Johnson, David H. Parsons, Gerald J. Teitman
  • Patent number: 5376261
    Abstract: A process and apparatus for controlling the flow of FCC catalyst around a catalyst regenerator, using a non-mechanical valve, is disclosed. The preferred non-mechanical valve provides a de-aeration section, addition of fluidizing gas, a "U" trap seal, and venturi gas outlet on the top of the trap, for reliable flow control of non-uniform settling particles such as FCC catalyst. Control of the flow of a fluidizing gas to such a valve changes the flow properties of the FCC catalyst and permits flow control without resort to plug valves, or other internal mechanical valves, which are difficult to use in the harsh environment experienced within FCC regenerators.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: December 27, 1994
    Assignee: Mobil Oil Corporation
    Inventor: Amos A. Avidan
  • Patent number: 5364515
    Abstract: An FCC process and apparatus is arranged to provide a low volume dilute disengagement zone in a reactor vessel. A vented riser that provides an open discharge of catalyst and gaseous products is directly discharged into a reactor vessel. The interior of the reactor vessel is arranged such that the outlet of the reactor riser is located close to and directed at the top of the reactor vessel. The reactor vessel operates with a dense bed of catalyst having an upper bed level that is only a short distance below the outlet of the reactor riser. The cyclone separators are located to the outside of the reactor riser and circulate catalyst directly back to the reactor riser or directly to an independent stripping vessel that returns the catalyst to the regenerator.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: November 15, 1994
    Assignee: UOP
    Inventors: David A. Lomas, Paul A. Sechrist, Edward C. Haun
  • Patent number: 5348642
    Abstract: A catalytic cracking process and apparatus wherein particles of cracking catalyst circulate continuously between a reaction zone and a regeneration zone and hot regenerated catalyst from the regeneration zone contacts hydrocarbon feed in the reaction zone to produce cracked hydrocarbon products and spent catalyst. The spent catalyst is recovered and subjected to stripping in a stripping zone to remove strippable material therefrom. The stripped spent catalyst is circulated to the regeneration zone for oxidative exothermic regeneration. Some hot regenerated catalyst is passed directly from the regenerator to the stripping zone via a conduit provided for this purpose. Another hydrocarbon stream is passed into contact with the hot regenerated catalyst in this conduit. The said other hydrocarbon stream is converted to products of enhanced value (e.g., olefins) during contact with catalyst in the conduit, and the said products are recovered.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: September 20, 1994
    Assignee: Exxon Research Engineering Co.
    Inventors: Willibald Serrand, Philip Holmes, Todd R. Steffens, Patrick H. Terry, Paul E. Eberly
  • Patent number: 5332704
    Abstract: A fluidized solid process for upgrading or converting a hydrocarbon feedstock wherein carbonaceous deposits accumulate on a particulate fluidized solid and are burned in a regenerator to regenerate the solid, the regenerated solid and entrained combustion products are introduced into a vertical lift pipe, a fluid lift medium is introduced into the lift pipe and the regenerated solid is separated from the lift medium and combustion products to improve the quality of the regenerated solid contacted with the hydrocarbon feedstock.
    Type: Grant
    Filed: March 19, 1993
    Date of Patent: July 26, 1994
    Assignee: Bar-Co Processes Joint Venture
    Inventor: David B. Bartholic
  • Patent number: 5284575
    Abstract: A fluidized catalytic cracking process operates with a turbulent or fast fluidized bed (FFB) spent catalyst stripper. Higher vapor velocities in the stripper improve stripping. Preferably spent catalyst is added to the stripper via cyclone diplegs. Preferably most of the spent catalyst is added into the bed near the top of the FFB stripper is removed via the top of the stripper, to a contiguous, annular bubbling dense bed stripper surrounding the FFB stripper. Some catalyst may be removed from the base of the FFB stripper.
    Type: Grant
    Filed: September 24, 1992
    Date of Patent: February 8, 1994
    Assignee: Mobil Oil Corporation
    Inventor: Hartley Owen