Liquid Cooling Step Before Being Recycled Patents (Class 95/180)
  • Patent number: 9556387
    Abstract: The invention relates to a process for the catalytic hydrotreating of a feed of oil origin, of diesel fuel type, in at least one fixed-bed hydrotreating reactor, for manufacturing diesel fuel, characterized in that incorporated into said feed are vegetable oils and/or animal fats up to a level of around 30% by weight, the mixture of said feed and vegetable oils and/or animal fats being introduced into the reactor operating in a single pass, without recycling liquid effluent at the top of the reactor. It also relates to a hydrotreating reactor for implementing said process, and to a corresponding hydrorefining unit.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: January 31, 2017
    Assignee: TOTAL RAFFINAGE FRANCE
    Inventors: Vincent Mayeur, Cesar Vergel, Laurent Mariette
  • Patent number: 8906149
    Abstract: The present application relates to a system for removal of gaseous contaminants from a gas stream. The system includes an absorber for contacting the gas stream with a wash solution to form a used wash stream, a regenerator for regenerating the used wash solution, a reboiler and at least two heat exchangers in fluid communication with the absorber, regenerator and reboiler.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: December 9, 2014
    Assignee: ALSTOM Technology Ltd
    Inventors: Barath Baburao, Jonathan W. Leister, Frederic Vitse
  • Patent number: 8845789
    Abstract: The present application relates to systems and processes for removal of gaseous contaminants from gas streams. In particular, the application relates to a process for removal of gaseous contaminants from a gas stream comprising contacting the gas stream with a wash solution to remove gaseous contaminants from the gas stream by absorption into the wash solution; and regenerating the used wash solution to remove gaseous contaminants from the used wash solution, to provide a regenerated wash solution and a gas comprising removed contaminants, wherein in a first regeneration stage the gas comprising removed contaminants is cooled to minimize loss of water vapor from the regeneration step.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: September 30, 2014
    Assignee: ALSTOM Technology Ltd
    Inventors: Barath Baburao, Jonathan W. Leister, Frederic Vitse
  • Patent number: 8845790
    Abstract: A method and system for removing gaseous contaminants from a gas stream by contacting the gas stream with a wash solution and regenerating the wash solution in a regeneration system for future use in removing gaseous contaminants from the gas stream.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: September 30, 2014
    Assignee: ALSTOM Technology Ltd
    Inventors: Jonathan W. Leister, Barath Baburao, Frederic Vitse
  • Publication number: 20140245888
    Abstract: A CO2 recovery apparatus provided with a CO2 absorption tower for making a purified exhaust gas and an absorbing liquid regeneration tower for regenerating a CO2 absorbing liquid by separating CO2 from the CO2 absorbing liquid, in which a lean solution removed of CO2 in the absorbing liquid regeneration tower is reused in the CO2 absorption tower, a cooling tower for cooling the CO2-containing exhaust gas containing CO2 is provided on the upstream flow side of the CO2 absorption tower so as to set a temperature (T2) of the purified exhaust gas exhausted from the CO2 absorption tower lower than a temperature (T1) of the CO2-containing exhaust gas containing CO2 cooled in the cooling tower (T1>T2), and a condensed water made by condensing water vapor discharged from the absorbing liquid regeneration tower is evaporated in an evaporation portion.
    Type: Application
    Filed: September 10, 2012
    Publication date: September 4, 2014
    Applicants: THE KANSAI ELECTRIC POWER CO., INC., MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Tatsuya Tsujiuchi, Hiroshi Tanaka, Hiromitsu Nagayasu, Takuya Hirata, Tsuyoshi Oishi, Takashi Kamijo, Masahiko Tatsumi, Yasuyuki Yagi, Kazuhiko Kaibara
  • Patent number: 8800308
    Abstract: Methods and systems are provided for air conditioning, capturing combustion contaminants, desalination, and other processes using liquid desiccants.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: August 12, 2014
    Assignee: 7AC Technologies, Inc.
    Inventors: Peter F. Vandermeulen, Jack I. Hanoka, Chaim Hanoka
  • Publication number: 20130284020
    Abstract: The invention provides a process for removing carbon dioxide from a gas stream comprising the steps of: (a) contacting the gas stream with an absorption solvent to obtain a gas stream with a reduced carbon dioxide content and a carbon dioxide-containing absorption solvent; (b) withdrawing at least part of the gas stream with the reduced carbon dioxide content; (c) withdrawing at least part of the carbon dioxide-containing absorption solvent obtained in step (a) and heat it to obtain a mixture comprising a gas phase, an aqueous liquid phase and a non-aqueous liquid phase, wherein carbon dioxide is predominantly present in the gas phase; (d) introducing at least part of the mixture obtained in step (c) into a gas lift reactor to further release carbon dioxide absorbed in the aqueous liquid phase and the non aqueous liquid phase, whereby the gas phase establishes circulation and mixing of the aqueous liquid phase and the non-aqueous liquid phase between a lower section of the gas lift reactor and an upper sectio
    Type: Application
    Filed: December 7, 2011
    Publication date: October 31, 2013
    Inventors: Frank Haiko Geuzebroek, Gerrit Konijn, Xiaohui Zhang
  • Publication number: 20130269526
    Abstract: Described are methods and apparatus for the selective removal of CO2 from a mixture of gases. The method comprises contacting a first gaseous mixture containing CO2 in an absorber with an absorbent having substantial selectivity for CO2, thereby forming a second mixture of absorbed CO2 and absorbent. After separating any nonabsorbed gases from the second mixture of CO2 and absorbent, the second mixture enters a separator wherein the CO2 is released from the absorbent. The absorbent is recycled back to the absorber to start the process over. The released CO2, is then compressed in one or more stages. Each stage provides a compression step to heat the released CO2, followed by a cooling step. The heat generated during the cooling of the CO2 is captured by intercoolers and recycled to operate the capture and separating process in a substantial manner, if not entirely.
    Type: Application
    Filed: September 12, 2012
    Publication date: October 17, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: STEVEN RAYMOND LUSTIG, F. Glenn Gallagher, Manish S. Kelkar
  • Patent number: 8425655
    Abstract: The present invention provides a gas pressurized separation system to strip a product gas from a liquid stream and yield a high pressure gaseous effluent containing the product gas. The system comprises a gas pressurized stripping apparatus, such as a column, with at least one first inlet allowing flow of one or more liquid streams in a first direction and at least one second inlet allowing flow of one or more high pressure gas streams in a second direction, to strip the product gas into the high pressure gas stream and yield through at least one outlet a high pressure gaseous effluent containing the product gas; and two or more heat supplying apparatuses provided at different locations along the column. Processes for separating a product gas from a gaseous mixture to yield a high pressure gaseous effluent containing the product gas, utilize the gas pressurized separation system described above.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: April 23, 2013
    Assignee: Carbon Capture Scientific, LLC
    Inventors: Shiaoguo Chen, Zijiang Pan
  • Patent number: 8398748
    Abstract: Contemplated configurations and methods include a solvent regenerator (58) that has an upper (93) and a lower stripping section (94). Cooled rich solve is used as reflux while heated rich solvent (11) is used as a source of stripping agent in the upper section (91). A reboiler (62) in the lower section provides further stripping agent, hi especially preferred configurations, a portion of lean solved from the regenerator (58) is further stripped in a separate or integrated regenerator (62) to form an ultra-lean solvent. Both lean and ultra-lean solvents are preferably used in a two-stage absorber (52) to thereby from the rich solvent and an offgas that is very low in acid gas.
    Type: Grant
    Filed: April 18, 2006
    Date of Patent: March 19, 2013
    Assignee: Fluor Technologies Corporation
    Inventor: John Mak
  • Patent number: 8388737
    Abstract: A method and apparatus for recovering a gaseous component from an incoming gas stream is described. The incoming gas stream is contacted with a lean aqueous absorbing medium to absorb at least a portion of the gaseous component from the incoming gas stream to form a lean treated gas stream and a rich aqueous absorbing medium. At least a portion of the gaseous component is desorbed from the rich aqueous absorbing medium at a temperature to form an overhead gas stream and a regenerated aqueous absorbing medium. At least a portion of the overhead gas stream is treated to recover a condensate stream. At least a portion of the condensate stream is used to form a heated stream. At least a portion of the heated stream is recycled back to the desorbing step. Novel absorbing medium compositions to recover carbon dioxide and/or hydrogen sulfide are also described.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: March 5, 2013
    Assignee: University of Regina
    Inventors: Don Gelowitz, Paitoon Tontiwachwuthikul, Raphael Idem
  • Patent number: 8357230
    Abstract: The invention relates to a process for purifying crude synthesis gas (1) containing metal carbonyls, in which undesirable substances such as sulphur components and/or carbon dioxide (CO2) and/or hydrocyanic acid (HCN) are scrubbed out by scrubbing with a physically acting scrubbing medium in at least one process step (main scrub (H)), and also an apparatus for carrying out the process. The crude synthesis gas (1) before introduction into the main scrub (H) is subjected to a gas scrub (carbonyl scrub (C)) in which a partial amount (4) of the laden scrubbing medium (2) taken off from the main scrub is used as scrubbing medium, with the partial amount (4) being chosen so that the metal carbonyls are (selectively) separated off from the crude synthesis gas (1) in the carbonyl scrub (C) largely independently of the other gas components.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: January 22, 2013
    Assignee: Linde Aktiengesellschaft
    Inventor: Ulvi Kerestecioglu
  • Patent number: 8257476
    Abstract: A first contaminant selected from oxygen and carbon monoxide is removed from impure liquid carbon dioxide using a mass transfer separation column system which is reboiled by indirect heat exchange against crude carbon dioxide fluid, the impure liquid carbon dioxide having a greater concentration of carbon dioxide than the crude carbon dioxide fluid. The invention has particular application in the recovery of carbon dioxide from flue gas generated in an oxyfuel combustion process or waste gas from a hydrogen PSA process. Advantages include reducing the level of the first contaminant to not more than 1000 ppm.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: September 4, 2012
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Vincent White, Rodney John Allam
  • Publication number: 20120003722
    Abstract: A system for removing CO2 from air such as atmospheric air is described that uses a cooling tower, a pseudo-cooling tower, or a wind capture device to provide a large volume of atmospheric air. A CO2 capture apparatus is positioned to contact atmospheric air moving towards or within the cooling tower, pseudo-tower, or wind capture device, and includes wherein the CO2 capture apparatus includes a CO2 binding agent that binds to CO2 in atmospheric air. An associated reprocessing apparatus releases C02 from the binding agent, directs the released CO2 to a CO2 storage chamber, and returns the binding agent to the CO2 capture apparatus. A system for removing CO2 from flue gas is also described.
    Type: Application
    Filed: March 18, 2010
    Publication date: January 5, 2012
    Applicant: COAWAY LLC
    Inventors: Robert B. Polak, Meyer Steinberg
  • Patent number: 7938888
    Abstract: A liquid desiccant regenerator system, including a desiccant/air heat exchanger having a first desiccant inlet and a desiccant reservoir. The reservoir has a first desiccant outlet, a second desiccant outlet and a second desiccant inlet. The first desiccant inlet and the first desiccant outlet are connectable to a heat source, the second desiccant inlet conducts diluted desiccant of the reservoir and the second desiccant outlet conducts concentrated desiccant from the reservoir. The second desiccant inlet and the desiccant outlet are connected to a desiccant/desiccant heat exchanger for applying heat to the diluted desiccant flowing into the reservoir. A dehumidification method is also provided.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: May 10, 2011
    Assignee: Agam Energy Systems Ltd.
    Inventor: Gad Assaf
  • Publication number: 20100319540
    Abstract: A process for removing acid gases from a fluid stream in which a) the fluid stream is treated with an absorption liquid which comprises at least one amine, a stripping aid, and water, wherein the stripping aid is selected from water-miscible liquids, the boiling temperature of which at atmospheric pressure is lower than that of water, b) the treated fluid stream is treated with a liquid aqueous phase in order to convert entrained stripping aid at least in part to the aqueous phase, c) the loaded aqueous phase is heated in order to expel the stripping aid at least in part, and d) the regenerated aqueous phase is cooled and at least in part recycled to step b). The stripping aid promotes the regeneration of the absorbent by stripping. Emissions of the stripping aid via the treated fluid stream are avoided by the treated fluid stream being scrubbed with a liquid aqueous phase.
    Type: Application
    Filed: June 21, 2010
    Publication date: December 23, 2010
    Applicant: BASF SE
    Inventors: Hugo Rafael Garcia Andarcia, Ralf Notz, Georg Sieder, Oliver Spuhl, Hans Hasse, Inga Toennies, Sebastian Hoch, Hari Prasad Mangalapally
  • Patent number: 7819951
    Abstract: A first contaminant selected from oxygen and carbon monoxide is removed from impure liquid carbon dioxide using a mass transfer separation column system which is reboiled by indirect heat exchange against crude carbon dioxide fluid, the impure liquid carbon dioxide having a greater concentration of carbon dioxide than the crude carbon dioxide fluid. The invention has particular application in the recovery of carbon dioxide from flue gas generated in an oxyfuel combustion process or waste gas from a hydrogen PSA process. Advantages include reducing the level of the first contaminant to not more than 1000 ppm.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: October 26, 2010
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Vincent White, Rodney John Allam
  • Patent number: 7754102
    Abstract: This invention discloses a method for the reclaim of carbon dioxide and nitrogen from boiler flue gas, which includes: the flue gas enters into the water-washing and desulfurizing tower from the inferior part and contacts the sulfide solution flowing backward for the cleaning and desulfurizing of the flue gas; the desulfurized flue gas is introduced to the inferior part of the chemical absorber, where the contained carbon dioxide contacts the carbon dioxide adsorption liquid (containing, by the total weight of the liquid, of, besides water, 20-60% water solution of compound amine, 5-10% polyoxinolum, 1-5% antioxygen and 1-5% corrosion inhibitor) flowing backward; The adsorption liquid coming from the bottom of the absorber and having absorbed carbon dioxide, after heated when passing through heat exchangers, is sent to the top of the carbon dioxide regenerator and flows down through the packing layer; carbon dioxide is emitted out from the top of the regenerator; Nitrogen separated out from the top of the che
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: July 13, 2010
    Assignee: CNPC Greatwall Drilling Engineering Company Ltd.
    Inventors: Fengshan Zhang, Yuanwen Gao, Yongchun Zhang
  • Publication number: 20100132552
    Abstract: One exemplary embodiment can be a process for increasing an efficiency of an acid gas removal zone. The process may include passing an absorber-solvent cooling stream through a heat exchanger. Usually, the heat exchanger warms the absorber-solvent cooling stream with a lean solvent stream before removing at least a portion of the carbon dioxide remaining in the absorber-solvent cooling stream and returning a partially-lean solvent stream to an absorber.
    Type: Application
    Filed: July 8, 2009
    Publication date: June 3, 2010
    Inventors: William J. Lechnick, Edward P. Zbacnik
  • Publication number: 20090199712
    Abstract: A method and a device for the absorption of pressurised natural gas containing at least hydrogen sulphide and carbon dioxide, using a physically active absorption agent. The natural gas containing acid gas is first conveyed to an absorption column, where it is directly contacted with the physical detergent, and the physical detergent absorbs the acid gas, leaving only a residue. The charged detergent is conveyed to a stripping column, the working pressure being further reduced. The residue of the released acid gas from the detergent is desorbed in said stripping column. The detergent thus regenerated is returned, at least in part, to the absorption column. The acid gas leaving the first separator is conveyed to another absorption column, in which the part of the released acid gas containing predominately hydrogen sulphide is reabsorbed with regenerated detergent and mixed with the charged detergent from the first separator.
    Type: Application
    Filed: May 23, 2006
    Publication date: August 13, 2009
    Inventors: Johannes Menzel, Martin Cosfeld
  • Publication number: 20090101868
    Abstract: This invention discloses a method for the reclaim of carbon dioxide and nitrogen from boiler flue gas, which includes: the flue gas enters into the water-washing and desulfurizing tower from the inferior part and contacts the sulfide solution flowing backward for the cleaning and desulfurizing of the flue gas; the desulfurized flue gas is introduced to the inferior part of the chemical absorber, where the contained carbon dioxide contacts the carbon dioxide adsorption liquid (containing, by the total weight of the liquid, of, besides water, 20-60% water solution of compound amine, 5-10% polyxinolum, 1-5% antioxygen and 1-5% corrosion inhibitor) flowing backward; The adsorption liquid coming from the bottom of the absorber and having absorbed carbon dioxide, after heated when passing through heat exchangers, is sent to the top of the carbon dioxide regenerator and flows down through the packing layer; carbon dioxide is emitted out from the top of the regenerator; Nitrogen separated out from the top of the c
    Type: Application
    Filed: November 9, 2007
    Publication date: April 23, 2009
    Inventors: Fengshan Zhang, Yuanwen Gao
  • Patent number: 6984257
    Abstract: An improved apparatus and method for use with a natural gas dehydrator. The apparatus and method of the invention provide for recirculation of gaseous or combustible materials so that they are not released into the atmosphere and to provide fuel for the process. Likewise, liquid hydrocarbons are collected. Various components, including separators, an absorber, wet glycol, dry glycol, an effluent condenser, heat exchangers, and a reboiler are utilized in accordance with the present invention.
    Type: Grant
    Filed: April 18, 2003
    Date of Patent: January 10, 2006
    Inventors: Rodney T. Heath, Forrest D. Heath
  • Patent number: 6896718
    Abstract: Moisture is removed from gas by contacting the gas with a solution of potassium formate to remove moisture from the gas, regenerating the potassium formate solution by removing water from it, and returning the potassium formate solution to contact gas to dehydrate it. Regeneration of the potassium formate solution is most preferably accomplished in a cavitation regenerator. The gas is most preferably natural gas.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: May 24, 2005
    Assignee: Clearwater International LLC
    Inventor: John H. Hallman
  • Patent number: 6793714
    Abstract: In a process for dehydration/fractionation of a wet natural gas containing heavy constituents and light constituents, In the presence of methanol, aqueous liquid phases are combined and the resultant combined aqueous liquid phase contacted with the first part of the gas to be scrubbed, which carries along the major part of the methanol, which allows to collect practically pure water. Before this step, all or part of one or both of the aqueous liquid phases and/or all or part of the aqueous liquid phase from a washing zone is sent to a distillation stage where practically pure methanol is collected at the top and a methanol-depleted aqueous liquid phase is collected at the bottom prior to being sent back to the first stage or used for the washing stage.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: September 21, 2004
    Assignee: Institut Francais du Petrole
    Inventors: Fabrice Lecomte, Béatrice Fischer, Jean-Charles Viltard
  • Patent number: 6767388
    Abstract: Process for dehydrating/fractionating a low-pressure wet natural gas containing “heavy” constituents and “light” constituents includes a stage a) in which at least a fraction of the wet gas at temperature T0 is contacted with an aqueous liquid phase L'1 containing methanol, the gas carrying along substantially all of the methanol contained in phase L'1. In a stage b), the gas from stage (a) is cooled to a temperature T1 lower than temperature T0, producing a gas phase G1 at equilibrium with a hydrocarbon-containing liquid phase L1 containing C3+ and an aqueous liquid phase L'1 containing methanol. In stage c), phase L'1 is sent to stage (a), and in stage d), said phase G1 is fractionated by distillation carried out by continuous thermal exchange with a cooling fluid, so as to extract the “light” constituents (gas phase G2) and the “heavy” constituents (condensed phase L2).
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: July 27, 2004
    Assignee: Institut Francais du Petrole
    Inventors: Fabrice Lecomte, Béatrice Fischer, Jean-Charles Viltard
  • Patent number: 6514321
    Abstract: A system and method for dehumidifying air including a multiple effect evaporator that creates a concentrated desiccant solution. The desiccant solution from the multiple effect evaporator is conveyed to a desiccant spray chamber that sprays the cooled desiccant solution into an air stream. The desiccant solution absorbs water vapor from the air stream creating a desiccant and water solution. A conduit transfers the water and desiccant solution to the multiple effect evaporator for removal of the water from the desiccant solution.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: February 4, 2003
    Assignee: PowerMax, Inc.
    Inventors: John M. Lehto, John Tyson
  • Publication number: 20020178918
    Abstract: In a process intended for dehydration/fractionation of a wet natural gas containing <<heavy>> constituents and <<light>> constituents, in the presence of methanol, which comprises at least the following stages
    Type: Application
    Filed: March 29, 2002
    Publication date: December 5, 2002
    Inventors: Fabrice Lecomte, Beatrice Fischer, Jean-Charles Viltard
  • Patent number: 6461413
    Abstract: In a process using a hydrophilic liquid desiccant, for dehydrating a gas containing water with regeneration of the steps of: (a) absorbing water by contact between the moist gas and regenerated liquid desiccant from step c), producing a dry gaseous effluent and a stream of liquid desiccant charged with water and absorbed gases; (b) regenerating the liquid desiccant charged with water in a regeneration zone constituting a reboiling zone and a distillation zone, the charged liquid desiccant being sent to said distillation zone, from which a vapor containing water leaves overhead and from which liquid desiccant still containing water leaves from the bottom in the reboiling zone; (c) passing the liquid desiccant from the reboiling zone of step b) and still containing water to an absorption zone, in which the water in the desiccant is vaporized and the water vapor is absorbed by a fraction of regenerated or non regenerated desiccant, passing the resultant desiccant which has absorbed water vapor to the reboiling z
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: October 8, 2002
    Assignee: Prosernat
    Inventors: Benoit Landreau, Jean-Claude Amande
  • Patent number: 6015450
    Abstract: Methanol emissions in the CO.sub.2 vent from a synthesis gas unit in an ammonia or hydrogen plant are reduced by contacting raw synthesis gas from a low temperature shift converter with recycled stripped condensate to absorb methanol. The synthesis gas is treated in a purification unit to form the CO.sub.2 vent of reduced methanol content. The condensate from the contacting step is steam stripped to form a process steam stream suitable for feed to the reformer and a stripped process condensate stream suitable for offsites polishing, a portion of which is recycled for contacting the raw synthesis gas.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: January 18, 2000
    Assignee: The M. W. Kellogg Company
    Inventors: Girish Chimanlal Joshi, Stephen Allen Noe
  • Patent number: 6004380
    Abstract: A process for dehydrating a natural gas or refinery gas containing water and BTEX using a liquid desiccant (glycol) and including regeneration provides the following steps:(a) absorption of the water and the BTEX by contacting the gas with the liquid desiccant which has been regenerated in step (c), producing a dry gaseous effluent and the liquid desiccant charged with water and BTEX;(b) separating the charged liquid desiccant into a vapor containing a portion of the BTEX and a liquid phase containing mainly desiccant charged with water and BTEX;(c) regenerating the liquid desiccant in a distillation zone from which a vapor containing water and BTEX and regenerated liquid desiccant are extracted, the latter being sent to absorption step (a);(d) condensing the vapor from the distillation zone and separating it into three phases: a gaseous effluent containing BTEX, a liquid hydrocarbon phase containing BTEX, and an aqueous liquid phase; and(e) washing the gaseous effluent by absorbing the BTEX in a fraction of
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: December 21, 1999
    Assignees: Nouvelles Applications Technologiques, Institut Francais du Petrole
    Inventors: Benoit Landreau, Jean-Claude Amande, Nicole Doerler, Alenxandre Bojey
  • Patent number: 5743944
    Abstract: An apparatus and method for separation of heavy noble gas in a gas volume. An apparatus and method have been devised which includes a reservoir containing an oil exhibiting a clathrate effect for heavy noble gases with a reservoir input port and the reservoir is designed to enable the input gas volume to bubble through the oil with the heavy noble gas being absorbed by the oil exhibiting a clathrate effect. The gas having reduced amounts of heavy noble gas is output from the oil reservoir, and the oil having absorbed heavy noble gas can be treated by mechanical agitation and/or heating to desorb the heavy noble gas for analysis and/or containment and allow recycling of the oil to the reservoir.
    Type: Grant
    Filed: October 11, 1995
    Date of Patent: April 28, 1998
    Assignee: University of Chicago
    Inventors: Kenneth C. Gross, Francis Markun, Mary T. Zawadzki
  • Patent number: 5520724
    Abstract: The invention relates to a process for the recovery of low molecular weight C.sub.2+ hydrocarbons, in particular ethylene and ethane from a cracking gas, in particular from a fluid catalytic cracking waste gas. In accordance with the invention the light C.sub.2+ hydrocarbons are scrubbed out of the cracking gas by absorption, using an organic, preferably paraffinic, physically acting scrubbing agent, the scrubbing agent having a molecular weight of between 50 and 75 g/mol, preferably between 60 and 75 g/mol. Particularly suitable as scrubbing agents are pentane, isopentane or mixtures thereof. Prior to the generation of the loaded scrubbing agent, co-extracted methane is advantageously stripped off.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: May 28, 1996
    Assignee: Linde Aktiengesellschaft
    Inventors: Heinz Bauer, Hans Becker
  • Patent number: 5462582
    Abstract: When a vapor-phase mixture is brought in contact with a liquid absorbent kept at a temperature above the condensation temperature of the vapor-phase mixture, the vapor-phase mixture becomes concentrated for those components which are absorbed by the absorbent in small or negligible amounts. In the method according to the invention, the regeneration of the absorbent essentially utilizes the heat of absorption of the absorbed components. The actual absorption process can be isothermal or adiabatic or a combination of these. The method is particularly suited to the separation of vapor-phase mixtures of minimum boiling point azeotropes.
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: October 31, 1995
    Assignee: K.H. Innovations Oy
    Inventor: Kaj Holm
  • Patent number: 5399188
    Abstract: An organic emissions elimination apparatus, and process for same, for substantially eliminating the emission of potentially harmful organic constituents, such as benzene, toluene and xylene ("BTX") into the ambient environment during dehydration of water bearing gas. The apparatus includes a first chamber which incorporates a membrane for use in association with a water absorbing material (such as triethylene glycol) which is operably displaceable and retained within the membrane fibers. Although the water vapors from the gas will permeate the membrane (and become absorbed by the triethylene glycol), the BTX will not be able to permeate the membrane. Accordingly, the BTX and the dehydrated gas will be discharged from the first chamber toward a point of use by conventional dehydrated gas using equipment.
    Type: Grant
    Filed: December 1, 1993
    Date of Patent: March 21, 1995
    Assignee: Gas Research Institute
    Inventor: Daryl L. Roberts
  • Patent number: 5308383
    Abstract: Disclosed is a method of removing chlorine from a mixture of gases. The mixture of gases is contacted with a liquid which contains a compound having the general formula ##STR1## where n is 1 to 3, whereby chlorine in the mixture of gases is absorbed by the liquid. The liquid is then heated to volatilize the chlorine and separate it from the liquid.
    Type: Grant
    Filed: June 21, 1993
    Date of Patent: May 3, 1994
    Assignee: Occidental Chemical Corporation
    Inventor: Edward A. Rowe