Amine Patents (Class 423/228)
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Patent number: 8945280Abstract: An amine solvent solution that is useful in absorbing acid gases from a liquid or gas feed stream may have an amine additive added thereto. Additionally or alternatively, the amine additive may be added to a liquid or gas feed stream. The addition of the amine additive decreases the presence of amine-derived contaminants and/or degradation of amine in the amine solvent solution. As such, the amine solvent solution is available for effective reuse in treating the liquid or gas feed stream and there may be a decrease in the corrosion within an amine treating system.Type: GrantFiled: December 3, 2009Date of Patent: February 3, 2015Assignee: Huntsman Petrochemical LLCInventors: Patrick E. Holub, Robert A. Grigsby, Jr., Larry R. White, James E. Critchfield
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Publication number: 20150030516Abstract: A carbon dioxide (CO2) chemical absorption system comprising: a CO2 absorption column for separating CO2 from combustion exhaust gas by absorbing the CO2 in the combustion exhaust gas with a CO2 absorbing liquid mainly composed of an aqueous alkanolamine solution; a regeneration column for regenerating the CO2 absorbing liquid by desorbing CO2 gas from the CO2 absorbing liquid that has absorbed CO2; a condenser for condensing water vapor entrained in the desorbed CO2 gas discharged from the top of the regeneration column, thereby obtaining reflux water; a pipe for returning all or part of the reflux water obtained by the condenser to the top of the regeneration column, and dispersing the reflux water in the regeneration column; a collection plate for collecting the reflux water dispersed in an upper portion of a packed bed in the regeneration column; a pipe for sending the regenerated CO2 absorbing liquid from the bottom of the regeneration column to the top of the absorption column; and a pipe for joining thType: ApplicationFiled: February 27, 2013Publication date: January 29, 2015Applicant: BABCOCK-HITACHI KABUSHIKI KAISHAInventors: Hideaki Higashi, Jun Shimamura, Kazuki Kobayashi
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Publication number: 20150027056Abstract: A process for increasing the selectivity of an alkanolamine absorption process for selectively removing hydrogen sulfide (H2S) from a gas mixture which also contains carbon dioxide (CO2) and possibly other acidic gases such as COS, HCN, CS2 and sulfur derivatives of C1 to C4 hydrocarbons, comprises contacting the gas mixture with a liquid absorbent which is a severely sterically hindered capped alkanolamine. The improvement in selectivity is achieved at the high(er) pressures, typically least about 10 bara at conditions nearing the H2S/CO2 equilibrium at which CO2 begins to displace absorbed hydrosulfide species from the absorbent solution.Type: ApplicationFiled: July 3, 2014Publication date: January 29, 2015Applicant: ExxonMobil Research and Engineering CompanyInventors: Pavel Kortunov, Michael Siskin, Robert B. Fedich
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Patent number: 8940261Abstract: A contaminant-tolerant hybrid scrubbing solvent is provided for post-combustion CO2 capture and removal, the scrubbing solvent including an amine and a low fraction of ammonia. A stripping carrier having a low latent energy is included for solvent regeneration. In one embodiment, the amine is MEA and the stripping chemical having low latent energy is pentane or an isomer thereof. Processes and apparatus for CO2 removal from post-combustion gases and for solvent regeneration are described.Type: GrantFiled: September 30, 2011Date of Patent: January 27, 2015Assignee: The University of Kentucky Research FoundationInventors: Kunlei Liu, James Kyle Neathery, Joseph Eugene Remias
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Patent number: 8920544Abstract: A method for removing acid gases from a fluid flow using an absorbent including an aqueous solution with at least two different amines. An amine in a proportion of greater than 50 wt. % of the total amine amount in the aqueous solution is the first amine component in the aqueous solution, and a sterically hindered amine in a proportion of less than 50 wt. % is the second amine component in the aqueous solution. The fluid flow is brought into contact with the absorbent at a partial pressure of <200 mbar.Type: GrantFiled: December 21, 2010Date of Patent: December 30, 2014Assignee: ThyssenKrupp Uhde GmbHInventors: Johannes Menzel, Olaf Von Morstein
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Publication number: 20140377156Abstract: Disclosed is a CO2 permselective membrane 1 having an amino acid ionic liquid and a porous membrane impregnated with the amino acid ionic liquid, wherein the amino acid ionic liquid contains a certain range of water.Type: ApplicationFiled: February 6, 2013Publication date: December 25, 2014Applicants: NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITY, RENAISSANCE ENERGY RESEARCH CORPORATIONInventors: Osamu Okada, Nobuaki Hanai, Eiji Kamio, Shohei Kasahara, Hideto Matsuyama
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Patent number: 8916117Abstract: A method for the reduction of corrosion in a treatment unit acid used for separating hydrogen sulfide from and acid gas stream using an alkaline absorption solution. Ions comprising the S2? and/or HS? ions formed by the absorption of the hydrogen sulfide in the absorbent solution are subjected to in situ electrochemical oxidization to form polysulfide ions which form a protective coating on the surfaces of the unit.Type: GrantFiled: December 5, 2013Date of Patent: December 23, 2014Assignee: ExxonMobil Research and Engineering CompanyInventors: Gordon Bryce McGarvey, Robert J. Falkiner, David R. Slim, Bryan M. Knickerbocker
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Publication number: 20140371478Abstract: A method for reversible capture and release of carbon dioxide comprises the steps of providing a solution of a defined tetranuclear complex or mixture thereof, in which absorption sites are provided by coordinated solvent molecules such as water molecules. The solution is exposed to the atmosphere or to a gas stream containing carbon dioxide to sequester carbon dioxide, and the pH of the resultant reaction mixture is adjusted to facilitate the release of carbon dioxide.Type: ApplicationFiled: November 15, 2012Publication date: December 18, 2014Inventors: Wolfgang Schmitt, Annmarie O'toole
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Publication number: 20140369914Abstract: A gas collection method comprises contacting a gas mixture including a weak acidic gas and a strong acidic gas with amine solution that absorbs a first portion of the gas mixture. After this first contacting step the gas mixture is contacted with amine solution that absorbs a second portion of the mixture. The amine solution after the second contacting step is heated to discharge at least some portion of the weak acid gas component absorbed therein. The method also includes adding an alkaline compound to the amine solution to generate a salt by reaction with the strong acidic component. The salt is separated from the amine solution and this amine solution can be used in the second contacting step.Type: ApplicationFiled: June 2, 2014Publication date: December 18, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Naomi TSUCHIYA, Takashi OGAWA, Masatoshi HODOTSUKA
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Patent number: 8911538Abstract: A system for treating an effluent stream including a carbon capture system utilizing an amine-containing solution to remove carbon dioxide from a flue gas stream, the carbon capture system generating an effluent stream comprising degradation products generated by the amine-containing solution; storage means for storing at least a portion of the effluent stream, the storage means being fluidly coupled to the carbon capture system. The system also including at least one nozzle connected to a combustion zone of a boiler, the at least one nozzle being fluidly coupled to the storage means for providing at least a portion of the effluent stream present in the storage means to the combustion zone of the boiler through the at least one nozzle, wherein the effluent stream provided to the combustion zone is co-incinerated with a fuel in the combustion zone.Type: GrantFiled: December 22, 2011Date of Patent: December 16, 2014Assignee: ALSTOM Technology LtdInventors: Staffan Joensson, Bjorn Ungerer, Christoph Weingartner, Shin G. Kang, Armand A. Levasseur
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Patent number: 8906135Abstract: A method for separating a target gas from a gaseous mixture using 1,2,3-triazolium ionic liquids is presented. Industrial effluent streams may be cleaned by removing carbon dioxide from the stream by contacting the effluent stream with a 1,2,3-triazolium ionic liquid compound.Type: GrantFiled: September 1, 2011Date of Patent: December 9, 2014Assignee: U.S. Department of EnergyInventors: David Luebke, Hunald Nulwala, Chau Tang
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Patent number: 8906149Abstract: 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: GrantFiled: August 26, 2014Date of Patent: December 9, 2014Assignee: ALSTOM Technology LtdInventors: Barath Baburao, Jonathan W. Leister, Frederic Vitse
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Publication number: 20140356268Abstract: The absorption of CO2 from a gas mixture by contacting the gas mixture with an absorption medium that comprises water and 5 to 50 wt % of amino acid salts of formula R1R2CHNHCH2COOK, in which R1 and R2 are n-alkyl radicals and the radicals R1 and R2 together have 2 to 4 carbon atoms, affords a high CO2 absorption capacity per unit weight in the cyclical operation of absorption and desorption.Type: ApplicationFiled: November 28, 2012Publication date: December 4, 2014Inventors: Alexander Schraven, Günter Knaup, Rolf Schneider
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Publication number: 20140335003Abstract: A carbon dioxide recovery system includes an absorption tower in which carbon dioxide is absorbed into an absorbing solution then the absorbing solution is output to a regeneration tower in which carbon dioxide is released from the absorbing solution. The regeneration tower outputs the absorbing solution from which carbon dioxide has been released and an exhaust gas included released carbon dioxide and water vapor. In a condensing section the exhaust gas is separated into dioxide gas stream and a condensed water stream. In a mixing section the condensed water is mixed with an amine to a replenishment amine aqueous solution in which the amine is dissolved in the condensed water. In a replenishment section the absorbing solution is mixed with the replenishment amine aqueous solution.Type: ApplicationFiled: May 8, 2014Publication date: November 13, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yasuhiro KATO, Shinji MURAI, Takehiko MURAMATSU, Satoshi SAITO
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Publication number: 20140335002Abstract: Systems and methods for separating CO2 and H2S from a natural gas stream are provided herein. The system includes a first loop of co-current contacting systems configured to remove H2S and CO2 from a natural gas stream and a second loop of co-current contacting systems configured to remove the H2S from the CO2.Type: ApplicationFiled: May 2, 2014Publication date: November 13, 2014Inventors: Paul Scott Northrop, Charles J. Mart, J. Tim Cullinane
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Patent number: 8883036Abstract: A process for the production of a H2S-enriched H2 gas stream without the need for H2S compression is disclosed. A slip stream of rich amine from a hydroprocessing unit is reduced in pressure and stripped with a hydrogen-containing gas. The H2S content of the resulting gas stream can be readily controlled by adjusting the stripping pressure and/or hydrogen rate. The H2S-enriched H2 gas stream is suitable for the sulfidation of catalytically active metals.Type: GrantFiled: March 13, 2013Date of Patent: November 11, 2014Assignee: Chevron U.S.A. Inc.Inventor: Bruce Edward Reynolds
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Publication number: 20140322115Abstract: The invention relates to a method of performing a carbon dioxide absorption with reduced risk of aerosol formation from a carbon dioxide containing stream in an absorption apparatus having a specific sequence of sections and wherein the method comprises specific steps. Another aspect of the invention relates to a use of a structured packing as part of a carbon dioxide absorption section in an apparatus for the absorption of carbon dioxide, characterized in that the use is in reducing the risk of aerosol formation in a top region of the carbon dioxide-absorption section. Yet another aspect of the invention is a use of an absorption apparatus comprising a specific sequence of sections, wherein the use is for avoiding a super-saturation of a solvent and water and a risk of aerosol formation.Type: ApplicationFiled: October 11, 2012Publication date: October 30, 2014Inventor: Markus Duss
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Patent number: 8864876Abstract: The invention generally relates to a method for sequestration contaminates. More particularly, the invention relates to a significant performance enhancement over existing mineral carbonation processes through the use of a high mass transfer system and an efficient pH swing reaction. More particularly, aspects of the invention are directed to direct and indirect methods of sequestering contaminates.Type: GrantFiled: September 28, 2009Date of Patent: October 21, 2014Assignee: Neumann Systems Group, Inc.Inventors: David Kurt Neumann, Boris R. Nizamov, Thomas Lee Henshaw, Jeremy L. Anderson
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Patent number: 8858828Abstract: The present disclosure provides a scrubbing composition containing an aqueous solution of 2-(3-aminopropoxy)ethan-1-ol. The scrubbing composition is especially suited for use in removing acid gases, such as carbon dioxide and hydrogen sulfide, from gas streams.Type: GrantFiled: October 18, 2011Date of Patent: October 14, 2014Assignee: Huntsman Petrochemical LLCInventors: Howard P. Klein, Robert A. Grigsby, Jr., Jingjun Zhou, Patrick Holub, Attila Gaspar, Zsolt Gaspar
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Patent number: 8858906Abstract: The invention provides a process for the removal of CO2 from a gas, the process comprising the steps of: (a) removing CO2 from the gas by contacting the gas with absorbing liquid in an absorber to obtain absorbing liquid enriched in CO2 and a purified gas; (b) heating absorbing liquid enriched in CO2 (c) contacting heated absorbing liquid enriched in CO2 with a stripping gas at elevated temperature in a regenerator to obtain regenerated absorbing liquid and a hot gas stream enriched in CO2 wherein at least part of the absorbing liquid enriched in CO2 is heated through external heat exchange with the hot gas stream enriched in CO2.Type: GrantFiled: March 11, 2009Date of Patent: October 14, 2014Assignee: Shell Oil CompanyInventors: Ayhan Eksilioglu, Frank Haiko Geuzebroek
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Publication number: 20140301930Abstract: The absorbent solution for removing acidic compounds contained in a gas effluent comprises water and at least one amine that is selected from among tertiary monoalkanolamines that contain an etheric function and belong to the 3-alkoxypropylamine family having general formula (A). The method for removing the acidic compounds contained in a gas effluent involves placing a gas effluent 1 into the column C1 together with the absorbent solution 4.Type: ApplicationFiled: September 28, 2012Publication date: October 9, 2014Applicant: IFP Energies nouvellesInventors: Bruno Delfort, Dominique Le Pennec, Julien Grandjean
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Publication number: 20140301929Abstract: A method for collecting carbon dioxide from flue gas of a power plant. The method includes: 1) mixing an organic amine, an ionic liquid, and water to obtain an aqueous solution of a composite absorbent; 2) spraying the aqueous solution of the composite absorbent into the flue gas to allow the flue gas flowing upwardly to fully contact with the downwardly sprayed aqueous solution of the composite absorbent and to allow CO2 in the flue gas to react with the composite absorbent to yield a solution rich in A.CO2 and B.CO2, where A represents the organic amine and B represents the ionic liquid; allowing the solution rich in A.CO2 and B.CO2 to stand and clarify to form different liquid layers; 3) thermally decomposing the mixed solution rich in A.CO2 and B.CO2 after heat exchange to release the chemically bound CO2.Type: ApplicationFiled: June 23, 2014Publication date: October 9, 2014Inventors: Zhilong WANG, Yanfeng ZHANG
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Publication number: 20140294709Abstract: Functionalized metal-organic framework adsorbents with ligands containing basic nitrogen groups such as alkylamines and alkyldiamines appended to the metal centers and method of isolating carbon dioxide from a stream of combined gases and carbon dioxide partial pressures below approximately 1 and 1000 mbar. The adsorption material has an isosteric heat of carbon dioxide adsorption of greater than ?60 kJ/mol at zero coverage using a dual-site Langmuir model.Type: ApplicationFiled: March 28, 2014Publication date: October 2, 2014Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Jeffrey R. Long, Thomas M. McDonald, Deanna M. D'Alessandro
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Patent number: 8845787Abstract: Acid compounds are removed from a gaseous effluent in an absorption method using an aqueous solution of N,N,N?,N?-tetramethylhexane-1,6-diamine formulated with a particular primary or secondary amine, allowing to obtain a single-phase absorbent solution under the absorption conditions of acid gases such as CO2. The method is advantageously applied to the treatment of natural gas and of gas of industrial origin.Type: GrantFiled: July 21, 2009Date of Patent: September 30, 2014Assignee: IFP Energies NouvellesInventors: Marc Jacquin, Julien Grandjean, Thierry Huard
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Patent number: 8845789Abstract: 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: GrantFiled: March 26, 2010Date of Patent: September 30, 2014Assignee: ALSTOM Technology LtdInventors: Barath Baburao, Jonathan W. Leister, Frederic Vitse
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Patent number: 8840806Abstract: Provided is an absorbent for capturing carbon dioxide. The absorbent may include an amino acid with multiple amine groups and an alkali-metal hydroxide mixed with the amino acid and thus, may increase an absorption capacity for carbon dioxide. When a sterically hindered effect is induced to the amino acid with multiple amine groups, the absorption capacity for carbon dioxide may increase and heat of absorption reaction may decrease and thus, energy consumed for regeneration of an absorbent may be reduced. The absorbent for capturing carbon dioxide may include amino acid with multiple amine groups and the metal hydroxide, and may provide a functional group around the amine groups to cause an sterically hindered effect and thus, the absorption capacity for carbon dioxide and an carbon dioxide absorption rate may increase, and the capital cost for a carbon dioxide capturing process and an operating cost may be significantly reduced.Type: GrantFiled: October 11, 2011Date of Patent: September 23, 2014Assignee: Korea Institute of Energy ResearchInventors: Soon Kwan Jeong, Sung Chan Nam, Si Hyun Lee, Sang Do Kim, Dong Hyuk Jeon, Yeo Il Yoon, Il Hyun Baek, Jin Ah Lim, Dae Hoon Kim
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Patent number: 8840704Abstract: A carbon dioxide separation method and a carbon dioxide separation apparatus capable of maintaining a carbon dioxide adsorption capacity for a long term by collecting an amine compound that evaporates during an operation of the apparatus and reloading the amine compound onto a carbon dioxide adsorbent. An amine collector and an amine aqueous solution preparation device are connected to an adsorbent-packed tank packed with a carbon dioxide adsorbent. An amine compound that evaporates from the carbon dioxide adsorbent during an operation of the apparatus is collected by the amine collector into the amine aqueous solution preparation device. The collected amine compound is reloaded onto the carbon dioxide adsorbent via a supply line.Type: GrantFiled: July 22, 2010Date of Patent: September 23, 2014Assignee: Kawasaki Jukogyo Kabushiki KaishaInventors: Takatoshi Shoji, Akira Kimura, Teruo Kishimoto
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Patent number: 8834822Abstract: A method for the separation of carbon dioxide from ambient air and flue gases is provided wherein a phase separating moiety with a second moiety are simultaneously coupled and bonded onto an inert substrate to create a mixture which is subsequently contacted with flue gases or ambient air. The phase-separating moiety is an amine whereas the second moiety is an aminosilane, or a Group 4 propoxide such as titanium (IV) propoxide (tetrapropyl orthotitanate, C12H28O4Ti). The second moiety makes the phase-separating moiety insoluble in the pores of the inert substrate. The new sorbents have a high carbon dioxide loading capacity and considerable stability over hundreds of cycles. The synthesis method is readily scalable for commercial and industrial production.Type: GrantFiled: August 18, 2011Date of Patent: September 16, 2014Assignees: Georgia Tech Research Corporation, U.S. Department of EnergyInventors: McMahan Gay, Sunho Choi, Christopher W. Jones
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Patent number: 8828130Abstract: An object of the present invention is to solve these problems and to provide a exhaust gas treatment system which prevents formation of deposits in a main duct and a flue, on and after the point where the exhaust gases converge, after the removal of CO2 and reduces labor required for maintenance such as cleaning, and thus enabling a long-term operation.Type: GrantFiled: March 3, 2010Date of Patent: September 9, 2014Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Jun Shimamura, Toshio Katsube, Shigehito Takamoto, Masaharu Kuramoto, Naoki Oda
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Publication number: 20140241968Abstract: The invention relates to a method for upgrading a gas by separation of carbon dioxide therefrom, which method comprises the steps of introducing a stream of gas to a wet bed of ion exchange resin, and desorbing the adsorbed carbon dioxide from the resin by increasing the temperature and/or lowering the pressure in said wet bed.Type: ApplicationFiled: January 2, 2013Publication date: August 28, 2014Applicant: RE-N TECHNOLOGY APSInventors: Bo Wennergren, Jens Tradsborg Christensen
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Publication number: 20140241967Abstract: In accordance with an embodiment, a carbon dioxide capturing apparatus includes a first absorbing unit, a regeneration unit, a water washing capturing unit, and a pre-amine capturing unit. The first absorbing unit brings a gas containing carbon dioxide into contact with an absorbing liquid containing an amine compound, and discharges the absorbing liquid which has absorbed carbon dioxide as a rich liquid. The regeneration unit releases a carbon dioxide gas from the rich liquid sent from the first absorbing unit. The water washing capturing unit captures the amine compound entrained in a decarbonated treatment gas sent from the first absorbing unit. The pre-amine capturing unit receives part of the rich liquid from the first absorbing unit, and traps the amine compound entrained in the decarbonated treatment gas by bringing the decarbonated treatment gas from the first absorbing unit into countercurrent contact with the part of the rich liquid.Type: ApplicationFiled: May 8, 2014Publication date: August 28, 2014Applicant: Kabushiki Kaisha ToshibaInventors: Koshito FUJITA, Masatoshi HODOTSUKA
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Publication number: 20140241966Abstract: Supported amine polymer adsorbents based on polymers containing only or primarily primary amines sites are to be used as regenerable adsorbents for CO2 capture from ultra-dilute gas streams, such as ambient air, or from mixtures of gases containing preferably at least 10% oxygen. and can also be useful for use at the moderate gas pressures found in typical post-combustion capture processes, such as flue gas from large point sources such as coal-fired power plants. Preferred supported solid amine adsorbents of this invention are based on poly(allylamine) (“PAA”) and poly(vinyl amine) (“PVAm”), both of which are linear polymers, and their derivatives, containing substantially all primary amine groups, supported on substrates. Preferred such substrates include silica mesocellular foam (MCF) and mesoporous-?-alumina, as well on mesoporous-?-alumina coated throughout the pores of MCF, most preferably of monolithic structure.Type: ApplicationFiled: October 25, 2013Publication date: August 28, 2014Inventors: Ratayakorn Khunsupat, Christopher W. Jones, Sumit Bali
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Patent number: 8814989Abstract: A process for removing carbon dioxide (CO2) by means of an absorption medium from a cycle gas system, wherein the CO2 occurs within a process in which, in the gas phase, ethylene is oxidized by oxygen (O2) to ethylene oxide (EO) in the presence of a catalyst, in which, as by product, CO2 is generated, by using as absorption medium an aqueous solution of one or more amines, wherein, for further purification of the cycle gas stream obtained downstream of the CO2 absorption step, this cycle gas stream is brought into intimate contact with water to which no mineral acid and no higher glycol was added.Type: GrantFiled: May 17, 2011Date of Patent: August 26, 2014Assignee: BASF SEInventors: Robin Thiele, Gerhard Theis
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Publication number: 20140234192Abstract: 1) A first amine, which is a straight chain secondary monoamine, 2) a second amine, which is a cyclic secondary polyamine as a reaction accelerator, and 3) a third amine, which is an amine consisting of one selected from a cyclic amine group constituted from a secondary or tertiary amino group or a straight chain amine group with high steric hindrance are mixed to obtain an absorbent. By the synergistic effect thereof, absorption properties to CO2 and/or H2S are excellent and the absorbed CO2 or H2S emission properties during the regeneration of the absorbent become excellent. Therefore, the water vapor amount used during the regeneration of the absorbent in CO2 recovery equipment can be reduced.Type: ApplicationFiled: October 17, 2012Publication date: August 21, 2014Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., THE KANSAI ELECTRIC POWER CO., INC.Inventors: Takuya Hirata, Hiroshi Tanaka, Tsuyoshi Oishi, Masahiko Tatsumi, Yasuyuki Yagi
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Publication number: 20140234191Abstract: The present invention relates to a novel class of aminopyridine derivatives with the general formula: wherein R1; R2, R3, and R4 are each independently hydrogen, an alkyl group, —(O—CH2—CH2)n-OH wherein n is an integer from 0 to 8, —CH2—(O—CH2—CH2)n-OH wherein n is an integer from 0 to 8, an hydroxyalkyl group, an aminoalkyl group where the nitrogen can be part of a 5 or 6 ring membered cycle, an alkylene group containing quaternary ammonium, a carboxylic acid and/or a salt thereof, or a sulphonic acid and/or a salt thereof, preferably R1; R2, R3, and R4 are each hydrogen. The compounds are useful for removal of hydrogen sulfide and other impurities from fluid streams containing hydrogen sulfide, including selective removal from such streams which also contain carbon dioxide.Type: ApplicationFiled: July 17, 2012Publication date: August 21, 2014Applicant: Dow Global Technologies LLCInventors: Christophe R. Laroche, Gerardo Padilla
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Patent number: 8808654Abstract: Organic sulfur compounds contained in refinery off gas streams having either high ort low concentrations of olefins are converted to hydrogen sulfides which can be then be removed using conventional amine treating systems. The process uses a catalytic reactor with or without a hydrotreater depending on the olefin concentration of the off gas stream. The catalytic reactor operates in a hydrogenation mode or an oxidation mode to convert a majority of organic sulfur compounds into hydrogen sulfides.Type: GrantFiled: August 16, 2010Date of Patent: August 19, 2014Assignee: Praxair Technology, Inc.Inventors: Minish Mahendra Shah, Raymond Francis Drnevich, Vasilis Papavassiliou
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Patent number: 8801836Abstract: The present invention relates to a method for recovery of carbon dioxide from a gas (G3), in particular the present invention relates to a method for recovery of carbon dioxide using a process gas (G1) heated reboiler (A1) for carbon dioxide removal in a stripper (A3).Type: GrantFiled: February 1, 2010Date of Patent: August 12, 2014Assignee: Union Engineering A/SInventor: Rasmus Find
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Publication number: 20140219899Abstract: Methods and systems for capturing carbon dioxide from dilute sources are disclosed. In some embodiments, the methods include the following: (a) directing a first substantially gaseous stream including a first amount of carbon dioxide to a primary scrubber; (b) in the primary scrubber, removing a portion of the first amount of carbon dioxide thereby forming a second substantially gaseous stream including a second amount of carbon dioxide; (c) directing the second substantially gaseous stream to a secondary scrubber; (d) in the secondary scrubber, removing a portion of the second amount of carbon dioxide thereby forming a third substantially gaseous stream; (e) mixing substantially all of the portion of the second amount of carbon dioxide removed in step (d) with the first substantially gaseous stream before it enters the primary scrubber; and (f) repeating steps (a) thru (e).Type: ApplicationFiled: February 6, 2012Publication date: August 7, 2014Inventors: Klaus Lackner, Allen Wright
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Patent number: 8795618Abstract: A method and apparatus for utilizing an amine-based absorption compound for flue gas, or combustion gas, CO2 capture, according to embodiments of the present invention. In some embodiments, CO2 is delivered from a wet, or dry, flue gas scrubber to an absorber. The amine-based absorption compound is introduced in an aqueous solution to the absorber, which is located downstream of the wet, or dry, flue gas scrubber. In some embodiments, the CO2-laden amine-based absorption compound is then subjected to a regeneration step to regenerate the CO2-laden amine-based absorption compound and strip out absorbed CO2. In some embodiments, energy is supplied to a stripper through a reboiler to accomplish the regeneration step.Type: GrantFiled: March 22, 2011Date of Patent: August 5, 2014Assignee: Babcock & Wilcox Power Generation Group, Inc.Inventors: Lei Ji, George A. Farthing, Jr.
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Patent number: 8795415Abstract: A process for removing carbon dioxide from a fluid comprises the steps of: (a) treating the fluid by bringing it into countercurrent contact with a liquid absorbent in a first absorption zone and thereafter in a second absorption zone to absorb at least part of the carbon dioxide contained in the fluid into the absorbent; (b) depressurizing the loaded absorbent to release a first stream of carbon dioxide and yield a partially regenerated absorbent; (c) recycling a first stream of the partially regenerated absorbent into the first absorption zone; (d) heating a second stream of the partially regenerated absorbent to release a second stream of carbon dioxide and yield a regenerated absorbent; (e) recycling the regenerated absorbent into the second absorption zone; (f) condensing water vapor entrained in the second stream of carbon dioxide by cooling the second stream of carbon dioxide and transferring at least part of the heat recovered to the partially regenerated absorbent by indirect heat exchange.Type: GrantFiled: May 25, 2010Date of Patent: August 5, 2014Assignees: BASF SE, JGC CorporationInventors: Torsten Katz, Georg Sieder, Koji Tanaka
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Publication number: 20140205525Abstract: Promoter amines are used to enhance CO2 uptake by sterically hindered or tertiary amines. The promoter amines can be cyclic amines, including aromatic cyclic amines or bridged cyclic amines. The combination of a promoter amine plus a sterically hindered or tertiary amines allows for improved uptake kinetics while reducing or minimizing the amount of formation of carbamate salts. The promoted sterically hindered or tertiary amines can be used as part of a CO2 capture and release system that involves a phase transition from a solution of amine-CO2 products to a slurry of amine-CO2 precipitate solids.Type: ApplicationFiled: November 21, 2013Publication date: July 24, 2014Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Pavel Kortunov, Michael Siskin
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Patent number: 8784760Abstract: The invention describes an integrated process for capturing CO2 emitted by at least a portion of the flue gas coming from the regeneration zone of a catalytic cracking unit using a unit for amine treatment of said flue gas, in which the catalytic cracking unit is equipped with an external exchanger using as the hot fluid a portion of the catalyst removed from the regeneration zone, the heat necessary for the amine treatment unit being supplied integrally by the catalytic cracking unit using the steam generated by said external exchanger.Type: GrantFiled: November 26, 2009Date of Patent: July 22, 2014Assignee: IFP Energies NouvellesInventors: Frederic Feugnet, Romina Digne, Pierre-Antoine Bouillon, Eric Lemaire
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Patent number: 8784537Abstract: CO2 is absorbed from a gas mixture by contacting the gas mixture with an absorption medium which comprises at least water as solvent and at least one amine of formula (I) where R1 is an aliphatic radical, having 2 to 6 carbon atoms and at least one amino group, and R2 is hydrogen, a C1-4 alkyl radical or a radical R1.Type: GrantFiled: November 10, 2011Date of Patent: July 22, 2014Assignee: Evonik Degussa GmbHInventors: Matthias Seiler, Rolf Schneider, Jörn Rolker, Daniel Dembkowski, Manfred Neumann, Daniel Witthaut, Michael Keup, Volker Brehme, Muhammad Irfan
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Publication number: 20140199220Abstract: Methods related to the removal of acidic gas are provided. In particular, the present disclosure relates to methods for the removal of acidic gas from a gas mixture, wherein said methods minimize the accumulated concentration of nitrosamines.Type: ApplicationFiled: January 14, 2013Publication date: July 17, 2014Inventors: Gary ROCHELLE, Mandana ASHOURIPASHAKI, Alexander K. VOICE, Omkar NAMJOSHI, Steven FULK
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Patent number: 8771403Abstract: The present invention provides a system for capturing CO2 and/or SO2, comprising: (a) a CO2 and/or SO2 absorber comprising an amine and/or amino acid salt capable of absorbing the CO2 and/or SO2 to produce a CO2- and/or SO2-containing solution; (b) an amine regenerator to regenerate the amine and/or amino acid salt; and, when the system captures CO2, (c) an alkali metal carbonate regenerator comprising an ammonium catalyst capable catalyzing the aqueous alkali metal bicarbonate into the alkali metal carbonate and CO2 gas. The present invention also provides for a system for capturing SO2, comprising: (a) a SO2 absorber comprising aqueous alkali metal carbonate, wherein the alkali metal carbonate is capable of absorbing the SO2 to produce an alkali metal sulfite/sulfate precipitate and CO2.Type: GrantFiled: February 1, 2013Date of Patent: July 8, 2014Assignee: The Regents of the University of CaliforniaInventors: Shih-Ger Chang, Yang Li, Xinglei Zhao
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Publication number: 20140186246Abstract: Methods are provided for synthesizing novel types of self-assembled siloxanes, such as polysiloxanes, with a sufficiently high density of amine functional groups to be useful for CO2 capture and release processes. Additionally, it has been unexpectedly found that some self-assembled polysiloxanes can be used for high temperature adsorption of CO2.Type: ApplicationFiled: November 25, 2013Publication date: July 3, 2014Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: David C. Calabro, Quanchang Li, Dennis G. Peiffer, Mobae Afeworki, Stephen M. Cundy, Charanjit S. Paur, Peter I. Ravikovitch
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Patent number: 8765083Abstract: This invention provides novel compositions comprising substituted polyamines as acid gas scrubbing solutions and methods of using the compositions in an industrial system. The invention relates to the use of such polyamine compounds in industrial processes to remove acidic contaminants from natural and industrial fluid streams, such as natural gas, combustion gas, natural gas, synthesis gas, biogas, and other industrial fluid streams. The compositions and methods of the invention are useful for removal, absorption, or sequestration of acidic contaminants and sulfide contaminants including CO2, H2S, RSH, CS2, COS, and SO.Type: GrantFiled: November 19, 2010Date of Patent: July 1, 2014Assignee: Nalco CompanyInventors: Alan M. Blair, Keith N. Garside, William J. Andrews, Kailas B. Sawant
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Patent number: 8765951Abstract: This invention provides novel compositions comprising substituted polyamines as acid gas scrubbing solutions and methods of using the compositions in an industrial system. The invention relates to the use of such polyamine compounds in industrial processes to remove acidic contaminants from natural and industrial fluid streams, such as natural gas, combustion gas, natural gas, synthesis gas, biogas, and other industrial fluid streams. The compositions and methods of the invention are useful for removal, absorption, or sequestration of acidic contaminants and sulfide contaminants including CO2, H2S, RSH, CS2, COS, and SO.Type: GrantFiled: May 1, 2013Date of Patent: July 1, 2014Assignee: Nalco CompanyInventors: Alan M. Blair, Keith N. Garside, William J. Andrews, Kailas B. Sawant
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Patent number: 8765088Abstract: The degradation of an absorbent solution comprising organic compounds having a amine function in aqueous solution is substantially reduced in the presence of a small amount of thiadiazole-derived degradation inhibiting agents defined by the general formula as follows: The absorbent solution is used to deacidize a gaseous effluent.Type: GrantFiled: June 23, 2009Date of Patent: July 1, 2014Assignee: IFP Energies nouvellesInventors: Pierre-Louis Carrette, Bruno Delfort
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Patent number: 8765086Abstract: A process for removal of H2S and CO2 from an acid gas stream comprising H2S and CO2, the process comprising the steps of: (a) reacting H2S in the acid gas stream with SO2 to form sulphur vapor and water vapor, thereby obtaining a first off-gas stream comprising CO2, water vapor, sulphur vapor, residual SO2 and residual H2S; (b) converting residual SO2 in the first off-gas stream to H2S in a first off-gas treating reactor, thereby obtaining a second off-gas stream depleted in SO2 and enriched in H2S and CO2 compared to the first off-gas stream; (c) contacting the second off-gas stream with an H2S absorbing liquid, thereby transferring H2S from the gas stream to the H2S absorbing liquid to obtain H2S absorbing liquid enriched in H2S and a third off-gas stream enriched in CO2; (d) removing CO2 from the third off-gas stream by contacting the third off-gas stream with CO2 absorbing liquid in a CO2 absorber, thereby transferring CO2 from the third off-gas stream to the CO2 absorbing liquid to obtain CO2 absorbing lType: GrantFiled: August 29, 2008Date of Patent: July 1, 2014Assignee: Shell Oil CompanyInventors: Theodorus Johannes Brok, Gerardus Petrus Van Der Zwet