Ethanolamine Patents (Class 423/229)
  • Patent number: 10221369
    Abstract: The invention relates to a process and a device for generating a fuel gas for a gas turbine by separating off sulphur components from a gas mixture containing hydrogen, carbon monoxide, carbon dioxide and also carbonyl sulphide and/or hydrogen sulphide, which gas mixture is in this case scrubbed in a physical gas scrubber with a methanol scrubbing medium at a pressure between 30 and 80 bar(a) in order to obtain a first sulphur-free gas mixture and also a methanol scrubbing medium loaded with sulphur components and carbon dioxide, which methanol scrubbing is then regenerated, wherein a carbon dioxide-rich gas phase that contains sulphur components and is formed by pressure reduction is treated in a further gas scrubber with a methanol scrubbing medium in order to back-wash sulphur components and to generate a second sulphur-free gas mixture.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: March 5, 2019
    Assignee: Linde Aktiengesellschaft
    Inventors: Stephan Zehrer, Jan-Peter Bohn
  • Patent number: 10213747
    Abstract: Membranes, methods of making the membranes, and methods of using the membranes are described. The membranes can comprise a support layer, and a selective polymer layer disposed on the support layer. The selective polymer layer can comprise an oxidatively stable carrier dispersed within a hydrophilic polymer matrix. The oxidatively stable carrier can be chosen from a quaternary ammonium hydroxide carrier (e.g., a mobile carrier such as a small molecule quaternary ammonium hydroxide, or a fixed carrier such as a quaternary ammonium hydroxide-containing polymer), a quaternary ammonium fluoride carrier (e.g., a mobile carrier such as a small molecule quaternary ammonium fluoride, or a fixed carrier such as a quaternary ammonium fluoride-containing polymer), and combinations thereof. The membranes can exhibit selective permeability to gases. The membranes can selectively remove carbon dioxide and/or hydrogen sulfide from hydrogen and/or nitrogen.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: February 26, 2019
    Assignee: Ohio State Innovation Foundation
    Inventors: W. S. Winston Ho, Witopo Salim, Varun Vakharia
  • Patent number: 10131596
    Abstract: Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: November 20, 2018
    Assignee: CHEVRON PHILLIPS CHEMICAL COMPANY LP
    Inventors: Lei Ji, Ai-Fu Chang, Michael S. Driver, Hye Kyung Timken
  • Patent number: 9994782
    Abstract: A method for operating a gas scrubber, wherein a first feed gas is scrubbed in a first scrubbing installation and a second feed gas is scrubbed in a second scrubbing installation operated in parallel to the first, with the same physically acting scrubbing medium, in order to dissolve sulfur components out of the feed gases containing contaminants and to obtain desulfurized gas streams, wherein scrubbing medium streams loaded with sulfur components and co-absorbed carbon monoxide arise, and wherein the first feed gas, the carbon monoxide partial pressure of which is lower than that of the second, is scrubbed in the first scrubbing installation at a lower pressure than the second feed gas in the second scrubbing installation. The scrubbing medium is loaded in the second scrubbing installation with sulfur components and co-absorbed carbon monoxide is expanded into the first scrubbing installation to convert dissolved carbon monoxide to the gas phase.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: June 12, 2018
    Assignee: Linde Aktiengesellschaft
    Inventor: Jan-Peter Bohn
  • Patent number: 9919262
    Abstract: A process for removing sulfur dioxide from a feed gas stream, which comprises (i) contacting the feed gas stream with an aqueous lean absorbing medium comprising a chemical solvent comprising a regenerable absorbent, a physical solvent, and one or more heat stable salts. The regenerable absorbent is an amine. The ratio of the wt % of the physical solvent over that of the regenerable absorbent is 0.5 to 2.5. The ratio of the wt % of heat stable salts over that of the regenerable absorbent is 0.29 to 0.37. The pH of the lean absorbing medium is 6 or less. With the process SO2 can be selectively removed. When the absorbing medium is stripped, a reduced amount of energy is required as compared to known processes.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: March 20, 2018
    Assignee: SHELL OIL COMPANY
    Inventors: Michel Ouimet, Mélina Infantino
  • Patent number: 9908085
    Abstract: A method for removing heat stable base salts, such as amine salts, is disclosed. The method of the present invention can be used to reduce the level of heat stable salts in a solvent gas stream in an acid gas removal process. A solvent in which the lean acid gas loading is high is first stripped to achieve an acceptable lean gas loading. The lean solution is then reclaimed using one or more methods. The purified base or amine solution can be used again to remove acid gases from a gas stream. A process for recovering acid gas from an acid gas stream is also disclosed. The process also comprises a reduction of the level of heat stable salts in the solvent gas stream.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: March 6, 2018
    Assignee: Electrosep Technologies, Inc.
    Inventor: Paul Parisi
  • Patent number: 9545595
    Abstract: The present invention relates to a method for recovery of high purity carbon dioxide from a gaseous source and uses thereof. More specifically, the present invention relates to the production of high purity carbon dioxide, which is substantially free of nitrogen, oxygen, nitrogen oxides, sulphurous compounds and volatile organic contaminants, particularly benzene. The present invention also relates to a method for removal of benzene from a carbon dioxide feeding gas as well as the use of said high purity carbon dioxide in foodstuffs.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: January 17, 2017
    Assignee: UNION ENGINEERING A/S
    Inventor: Rasmus Find
  • Patent number: 9463417
    Abstract: Methods and systems for CO2 separation in low emission power plants are provided. One system includes a gas turbine system that combusts a fuel and an oxidant in the presence of a compressed recycle stream to provide mechanical power and a gaseous exhaust. A purge stream is taken from the compressed recycle stream and directed to a CO2 separator configured to absorb CO2 from the purge stream using a potassium carbonate solvent. Volatiles are removed from the rich solvent by stripping or by flashing to an intermediate pressure before the rich solvent is regenerated and CO2 is removed.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: October 11, 2016
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Russell H. Oelkfe, Richard A. Huntington, Franklin F. Mittricker
  • Patent number: 9382127
    Abstract: CO2 capture from flue gas is a costly procedure, usually due to the energy required for regeneration of the capture medium. One potential medium which could reduce such an energy consumption, however, is Na2CO3. It has been well studied as a sorbent, and it is understood that the theoretical energy penalty of use of Na2CO3 for CO2 separation is low, due to the relatively low heat of reaction and low heat capacity of the material. While it offers some advantages over other methods, its primary downfall is the slow reaction with CO2 during adsorption and the slow Na2CO3 regeneration process. An aspect of the invention relates to a catalyst to improve reaction kinetics, and more particularly to a catalyst to improve reaction kinetics for CO2 desorption and CO2 adsorption.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: July 5, 2016
    Inventor: Maohong Fan
  • Patent number: 9321005
    Abstract: The invention comprises an absorbent composition and process for purification of gaseous mixtures. The composition comprises a mixture of a physical absorption solvent and an ionic liquid. It was found that the mixtures provided improved absorption of a gas component, such as carbon dioxide, when compared physical absorption solvents.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: April 26, 2016
    Assignee: UOP LLC
    Inventors: Erin M. Broderick, Alakananda Bhattacharyya
  • Patent number: 9254462
    Abstract: In a reclaiming apparatus (106) that includes an airtight container (106a) as an absorbent storing unit that stores a part of an absorbent that absorbs CO2 included in an exhaust gas and a heating unit that heats the absorbent stored in the airtight container (106a), a part of the absorbent stored in the airtight container (106a) is distributed, and a gaseous body is brought into counterflow contact with the absorbent that is distributed. As a result, since the gaseous body is brought into counterflow contact with a part of the absorbent stored in the absorbent storing unit, an absorbent component volatilizes and is separated from a degraded material, and the absorbent component can be extracted from the degraded material, whereby a loss of the absorbent can be reduced.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: February 9, 2016
    Assignees: MITSUBISHI HEAVY INDUSTRIES LTD., THE KANSAI ELECTRIC POWER CO., INC.
    Inventors: Masaki Iijima, Masahiko Tatsumi, Yasuyuki Yagi, Kouki Ogura
  • Patent number: 9168487
    Abstract: An aqueous carbon dioxide-absorbent solution comprising at least one alkanolamine and at least one quaternary ammonium salt is disclosed. A method of recovering carbon dioxide from a carbon dioxide-containing gaseous mixture and a method of reducing metal corrosion in an alkanolamine-based exhaust gas treating process are also disclosed.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: October 27, 2015
    Assignee: LONZA LTD.
    Inventors: Larry Kent Hall, Joseph Kimler, Thomas Bedard
  • Patent number: 9126879
    Abstract: One exemplary embodiment can be a process for treating a hydrocarbon stream. The stream can include passing the hydrocarbon stream into a vessel containing a packed zone and a coalescing zone, passing an amine stream into the vessel at a location above an inlet for the hydrocarbon stream, and withdrawing the hydrocarbon stream.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: September 8, 2015
    Assignee: UOP LLC
    Inventor: Luigi Laricchia
  • Patent number: 9059489
    Abstract: An HF feed bushing device is provided that is designed to connect an HF transmitter/receiver to an antenna via an external medium by means of a balanced two-wire line. The balanced two-wire line is at least partially encapsulated in a central part of a closed conduit including a wall isolating the balanced two-wire line from the external medium. Applications: Feeding of antennas via balanced two-wire lines.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: June 16, 2015
    Assignee: THALES
    Inventors: Frédéric Lamour, Alain Eberland, Alain Denechaud
  • Publication number: 20150147254
    Abstract: A process for selectively removing hydrogen sulphide relative to carbon dioxide from a gaseous mixture containing at least hydrogen sulphide H2S and carbon dioxide CO2, includes a step of contacting the gaseous mixture with an absorbent solution including at least one amine, water, and at least one C2 to C4 thioalkanol. A use of the absorbent solution for selectively removing hydrogen sulphide relative to carbon dioxide from a gaseous mixture containing at least hydrogen sulphide and carbon dioxide, is disclosed. Disclosed is a use of at least one C2 to C4 thioalkanol as an additive in an absorbent solution including at least one amine, and water, for increasing the selectivity of the absorbent solution for the removal of hydrogen sulphide relative to carbon dioxide from a gaseous mixture containing at least hydrogen sulphide and carbon dioxide.
    Type: Application
    Filed: May 23, 2013
    Publication date: May 28, 2015
    Inventors: Claire Weiss, Renaud Cadours, Jing Zhao, Virenkumar Shah, Serge Capdeville
  • Patent number: 9034288
    Abstract: A CO2 amine scrubbing process uses an absorbent mixture consisting of an alkanolamine CO2 sorbent in combination with a non-nucleophilic base. The alkanolamine has oxygen and nitrogen sites capable of nucleophilic attack at the CO2 carbon atom. The nucleophilic addition is promoted in the presence of the non-nucleophilic, relatively stronger base, acting as a proton acceptor. The non-nucleophilic base promoter, which may also act as a solvent for the alkanolamine, can promote reaction with the CO2 at each of the reactive hydroxyl and nucleophilic amine group(s) of the alkanolamines. In the case of primary amino alkanolamines the CO2 may be taken up by a double carboxylation reaction in which two moles of CO2 are taken up by the reacting primary amine groups.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: May 19, 2015
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Lisa S. Baugh, Pavel Kortunov, David C. Calabro, Michael Siskin
  • Publication number: 20150132207
    Abstract: An absorbent is prepared by dissolving in water 1) monoethanolamine (MEA) and 2) a primary amine represented by the following formula (1) and having high steric hindrance. Releasability of CO2 or H2S during regeneration of the absorbent is thereby improved, and the amount of water vapor used during regeneration of the absorbent in a facility for recovering CO2 or H2S can be reduced. R1 to R3: H or a hydrocarbon group having 1 to 3 carbon atoms, at least one of R1 to R3 being a hydrocarbon.
    Type: Application
    Filed: April 25, 2013
    Publication date: May 14, 2015
    Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., THE KANSAI ELECTRIC POWER CO., INC.
    Inventors: Hiroshi Tanaka, Hiromitsu Nagayasu, Takuya Hirata, Tsuyoshi Oishi, Takashi Kamijo
  • Publication number: 20150050203
    Abstract: A system, method, and material that enables the pressure-activated reversible chemical capture of acid gasses such as CO2 from gas volumes such as streams, flows or any other volume. Once the acid gas is chemically captured, the resulting product typically a zwitterionic salt, can be subjected to a reduced pressure whereupon the resulting product will release the captures acid gas and the capture material will be regenerated. The invention includes this process as well as the materials and systems for carrying out and enabling this process.
    Type: Application
    Filed: October 17, 2014
    Publication date: February 19, 2015
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: David J. Heldebrant, Phillip K. Koech, John C. Linehan, James E. Rainbolt, Mark D. Bearden, Feng Zheng
  • Patent number: 8951490
    Abstract: A CO2 recovery method and apparatus for desorbing and recovering carbon dioxide with low energy consumption from a gas discharged from a power generation plant having a boiler and a steam turbine. The adsorption and the desorption of carbon dioxide are performed alternately in two CO2 absorbers and located in a CO2 recovery apparatus, which each hold a carbon dioxide adsorbent. When carbon dioxide is desorbed, steam discharged from an outlet of a steam turbine of a power generation plant is partially branched before introduced into a condenser, and sent to a steam compressor. The partially branched steam is compressed in this compressor, and then sent to a cooling device. By cooling, the steam for desorption is prepared. The steam prepared in the cooling device is supplied into a CO2 absorber to desorb carbon dioxide. Accordingly, waste steam, before it is introduced into the condenser, is usable for desorption.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: February 10, 2015
    Assignee: Kawaski Jukogyo Kabushiki Kaisha
    Inventors: Takeshi Okumura, Yoshiharu Nonaka, Tomoyuki Ogino, Takatoshi Shoji, Masatoshi Hirokawa, Noboru Takikawa, Kazuto Kamazawa
  • Patent number: 8940261
    Abstract: 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: Grant
    Filed: September 30, 2011
    Date of Patent: January 27, 2015
    Assignee: The University of Kentucky Research Foundation
    Inventors: Kunlei Liu, James Kyle Neathery, Joseph Eugene Remias
  • Patent number: 8883036
    Abstract: 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: Grant
    Filed: March 13, 2013
    Date of Patent: November 11, 2014
    Assignee: Chevron U.S.A. Inc.
    Inventor: Bruce Edward Reynolds
  • Patent number: 8814989
    Abstract: 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: Grant
    Filed: May 17, 2011
    Date of Patent: August 26, 2014
    Assignee: BASF SE
    Inventors: Robin Thiele, Gerhard Theis
  • Patent number: 8784760
    Abstract: 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: Grant
    Filed: November 26, 2009
    Date of Patent: July 22, 2014
    Assignee: IFP Energies Nouvelles
    Inventors: Frederic Feugnet, Romina Digne, Pierre-Antoine Bouillon, Eric Lemaire
  • Patent number: 8771403
    Abstract: 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: Grant
    Filed: February 1, 2013
    Date of Patent: July 8, 2014
    Assignee: The Regents of the University of California
    Inventors: Shih-Ger Chang, Yang Li, Xinglei Zhao
  • Patent number: 8765086
    Abstract: 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 l
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: July 1, 2014
    Assignee: Shell Oil Company
    Inventors: Theodorus Johannes Brok, Gerardus Petrus Van Der Zwet
  • Patent number: 8703082
    Abstract: The present invention relates to a method for capturing CO2 from exhaust gas in an absorber (A1), wherein the CO2 containing gas is passed through an aqueous absorbent slurry wherein said aqueous absorbent slurry comprises an inorganic alkali carbonate, bicarbonate and at least one of an absorption promoter and a catalyst, and wherein the CO2 is converted to solids by precipitation in the absorber, said slurry having the precipitated solids is conveyed to a separating device (F1), in which the solids are separated off, essentially all of at least one of the absorption promoter and catalyst is recycled together with the remaining aqueous phase to the absorber.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: April 22, 2014
    Assignee: Sinvent AS
    Inventors: Hallvard F. Svendsen, Finn Andrew Tobiesen, Thor Mejdell, Karl Anders Hoff
  • Patent number: 8652237
    Abstract: A system and process are disclosed for selective removal and recovery of H2S from a gaseous volume, e.g., from natural gas. Anhydrous organic, sorbents chemically capture H2S gas to form hydrosulfide salts. Regeneration of the capture solvent involves addition of an anti-solvent that releases the captured H2S gas from the capture sorbent. The capture sorbent and anti-solvent are reactivated for reuse, e.g., by simple distillation.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: February 18, 2014
    Assignee: Battelle Memorial Institute
    Inventors: David J. Heldebrant, Phillip K. Koech, James E. Rainbolt, Mark D. Bearden, Feng Zheng
  • Patent number: 8641922
    Abstract: A sorbent for removal of acid gas from hydrocarbon gas includes a mixture of dewatered residue obtained from the distillation of ethanol, and an amine.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: February 4, 2014
    Assignee: Intevep, S.A.
    Inventors: Alfredo Viloria, Rafael Yoll, Yanine Gonzalez, Monica Roman, Jose Biomorgi
  • Publication number: 20140017153
    Abstract: Systems containing imidazoles or blends of imidazoles and amines are described herein. Methods of their preparation and use are also described herein. The methods of using the systems include the reduction of volatile compounds from gas streams and liquid streams.
    Type: Application
    Filed: June 10, 2013
    Publication date: January 16, 2014
    Inventor: Jason E. Bara
  • Publication number: 20130309155
    Abstract: A method for removing heat stable base salts, such as amine salts, is disclosed. The method of the present invention can be used to reduce the level of heat stable salts in a solvent gas stream in an acid gas removal process. A solvent in which the lean acid gas loading is high is first stripped to achieve an acceptable lean gas loading. The lean solution is then reclaimed using one or more methods. The purified base or amine solution can be used again to remove acid gases from a gas stream. A process for recovering acid gas from an acid gas stream is also disclosed. The process also comprises a reduction of the level of heat stable salts in the solvent gas stream.
    Type: Application
    Filed: January 24, 2012
    Publication date: November 21, 2013
    Applicant: ELECTROSEP TECHNOLOGIES INC. `
    Inventor: Paul Parisi
  • Patent number: 8535419
    Abstract: A modular amine plant having a front-end module and a back-end module in fluid communication with each other. The front-end module having pre-fabricated connections for the association of various equipment including: a filter, an absorption tower, and a flash tank. The back-end module having pre-fabricated connections for the association of other various equipment including: a heat exchanger, a distillation tower, and a reboiler. The modular amine plant capable of being installed at a site in less than about 5 days. The modular amine plant further having moment forces sufficient to withstand wind speeds of about 100 miles per hour.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: September 17, 2013
    Assignee: Zephyr Gas Services LLC
    Inventors: Glen Wind, John Kenton Thompson, Lance Perryman
  • Patent number: 8529857
    Abstract: A method for removing acid gases from a fluid stream comprises a) treating the fluid stream in an absorption zone with an absorption medium which comprises an aqueous solution of at least one amine, conducting the treated fluid stream through at least two scrubbing zones and treating it with a non-acidic aqueous phase in order to transfer entrained amine and/or entrained amine decomposition products at least in part to the aqueous phase, wherein aqueous phase is recycled via at least one scrubbing zone and aqueous phase is conducted through at least one scrubbing zone without recycling. The method permits efficient retention of amines from the treated fluid streams.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: September 10, 2013
    Assignee: BASF SE
    Inventors: Georg Sieder, Ralf Notz, Hugo Rafael Garcia Andarcia, Sandra Schmidt, Peter Moser
  • Patent number: 8486183
    Abstract: An acid gas absorbent comprising an alkylamino alkyloxy (alcohol) monoalkyl ether and a process for the selective removal Of H2S from gaseous mixtures containing H2S and CO2 using an absorbent solution comprising an alkylamino alkyloxy alcohol monoalkyl ether.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: July 16, 2013
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Michael Siskin, Edmund John Mozeleski, Robert Basil Fedich, Frank Cheng-Yu Wang
  • Patent number: 8476475
    Abstract: A premix is described for producing an absorption medium for removing acid gases from fluid streams. The premix comprises at least one alkanolamine, piperazine and water, the premix having a total amine content of more than 65% by weight, the molar ratio of water to piperazine in the premix being 1.6 to 4.8. The premix is characterized by a low solidification point. It is diluted with water and/or alkanolamine to give the ready-to-use absorption medium.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: July 2, 2013
    Assignee: BASF SE
    Inventor: Norbert Asprion
  • Patent number: 8470079
    Abstract: The present invention relates to a process for separating off CO2 from a gas stream, wherein in a second step the CO2 is removed from the CO2-absorbing agent by means of phase separation.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: June 25, 2013
    Assignee: Universital Dortmund
    Inventors: David Agar, Yudy Halim Tan, Zhang Xiaohui
  • Patent number: 8419832
    Abstract: The invention relates to a process for the purification of a gaseous mixture containing mercaptans and other acid gases comprising a stage of bringing said gaseous mixture into contact with an absorbent solution comprising an alkanolamine, a C2-C4 thioalkanol and water.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: April 16, 2013
    Assignee: Total S.A.
    Inventors: Serge Capdeville, Jean-Louis Peytavy, Georges Fremy, Didier Anglerot
  • Patent number: 8419831
    Abstract: Disclosed is a method for recovering carbon dioxide from a gas containing carbon dioxide, comprising the step (1) of bringing a gas containing carbon dioxide into contact with an aqueous solution containing 2-isopropylaminoethanol and at least one substance selected from the group consisting of piperazines and alkanolamines to absorb carbon dioxide into the aqueous solution; and the step (2) of heating the aqueous solution containing carbon dioxide absorbed therein, which is obtained in the step (1), to separate and recover carbon dioxide from the solution.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: April 16, 2013
    Assignee: Research Institute of Innovative Technology for the Earth
    Inventors: Shinkichi Shimizu, Firoz Alam Chowdhury, Hiromichi Okabe, Kazuya Goto
  • Publication number: 20130052110
    Abstract: A process for removing CO2 from a CO2 containing gas stream in which the CO2 containing gas stream is contacted with an aqueous ammonium solution. The aqueous ammonia solution comprises 0.1-40% w/v, v/v/ w/w ammonia, and a soluble salt at a concentration range of 0.01%-10% wt or v/v or w/v, the soluble salt having cations selected from the group of group IA, IIA, IIIA and IVA metals with counter anions selected from the group of anion of group VIIA elements, NO3?, SO42?, OH43?, PO43? and HCO3?. The invention also extends to a CO2 capture solvent comprising an aqueous ammonia solution and the above soluble salt.
    Type: Application
    Filed: February 21, 2011
    Publication date: February 28, 2013
    Inventors: Phil Jackson, Moetaz Ibrahim Attalla, Benjamin Jack Ballinger
  • Patent number: 8361425
    Abstract: A method for removing CO2 in a exhaust gas from combustion of carbonaceous material, in which method the exhaust gas is brought in countercurrent flow with a liquid CO2 absorbent in a contact section of an absorption column, to produce a CO2 depleted exhaust gas that is released into the atmosphere and a CO2 rich absorbent that is withdrawn from the absorption column, wherein the exhaust gas is introduced into the absorption column at a temperature above about 90 and the exhaust gas is cooled in the absorption column by countercurrent flow of the liquid absorbent in the absorption column, is described.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: January 29, 2013
    Assignee: Aker Clean Carbon AS
    Inventors: Randi Lund, Knut Sanden, Anne-Helene Haaland, Trygve Andreas Rikheim, Simon Woodhouse
  • Patent number: 8318117
    Abstract: Absorption medium for acid gases comprising an oligoamine (A) of the general formula (I) and a primary or secondary alkanolamine (B) of the general formula (II) in which the weight ratio of oligoamine (A) to the primary or secondary alkanolamine (B) is 0.2 to 4, and also the process for removing acid gases from a gas stream by contacting the gas stream at a pressure of 0.05 to 10 MPa abs with an aqueous solution brought to and maintained at a temperature of 20 to 80° C. of said absorption medium.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: November 27, 2012
    Assignee: BASF SE
    Inventors: Ute Lichtfers, Robin Thiele, Susanna Voges, Georg Sieder, Oliver Spuhl, Hugo Rafael Garcia Andarcia
  • Publication number: 20120288429
    Abstract: The invention generally relates to a bi-directional reactor and supported amine sorbent, and more particularly to a method and system for carbon dioxide sequestration utilizing a bi-directional reactor and monoethenalamine (MEA) on a substrate. The bi-directional reactor is configured to reclaim the sorbent material as the sorbent is immobilized during the sorption phase, but is mobilized during desorption phased. The immobilized sorbent reacts with the desired contaminate to absorb and is transported to another reactor during desorption phase, thereby permitting reclamation of the sorbent.
    Type: Application
    Filed: May 11, 2012
    Publication date: November 15, 2012
    Inventor: Maohong Fan
  • Patent number: 8303685
    Abstract: An improved acid gas regeneration and injection process wherein the separated acid gas stream emerging from a regenerator is compressed and injected into subsurface reservoir, the improvement comprising conducting the acid gas separation in the regenerator under pressure that exceeds 50 psia and does not exceed 300 psia.
    Type: Grant
    Filed: June 21, 2004
    Date of Patent: November 6, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Craig N. Schubert, Timothy C. Frank
  • Patent number: 8287626
    Abstract: A method for treating a gas mixture containing acid gases, including: contacting the gas mixture with an absorbing solution, to obtain a de-acidified gas mixture and an absorbing solution with acid gases. To regenerate the absorbing solution with acid gases, the absorbing solution is passed into a first regenerator at a first pressure, then the solution is passed into a second regenerator at a second pressure, and finally to a third regenerator at a third pressure, the third pressure being less than the second pressure which is less than the first pressure. The gases from the second and third regenerator are compressed and recycled to the first and second regenerator, respectively. Gases from the second and/or the third regenerator are drawn off to provide a gas mixture rich in hydrogen sulfide. Gases from the first regenerator are drawn off to provide a gas mixture rich in carbon dioxide.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: October 16, 2012
    Assignee: Total S.A.
    Inventors: Viep Hoang-Dinh, Damien Roquet, Kenza Habchi-Tounsi, Olivier Chazelas, Claire Weiss
  • Publication number: 20120248372
    Abstract: Systems containing imidazoles or blends of imidazoles and amines are described herein. Methods of their preparation and use are also described herein. The methods of using the systems include the reduction of volatile compounds from gas streams and liquid streams.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 4, 2012
    Applicant: BOARD OF TRUSTEES OF THE UNIVERSITY OF ALABAMA
    Inventor: Jason E. Bara
  • Publication number: 20120251421
    Abstract: Acid gas purification processes for reducing nitrosamine precursor formation from a gas stream containing NOx, wherein the acid gas is selectively absorbed in an amine based wash solution comprising at least one secondary diamine. The processes generally include absorbing carbon dioxide from the gas stream containing NOx species with the amine-based wash solution comprising at least one secondary diamine to provide a carbon dioxide lean gas stream that is released into the surroundings, wherein absorbing the acid gas forms a rich amine solution; and regenerating the rich amine solution at an elevated temperature to release the carbon dioxide to form a regenerated lean amine solution, wherein absorbing and regenerating are configured to promote formation of carbamate species of at least one diamine.
    Type: Application
    Filed: January 20, 2012
    Publication date: October 4, 2012
    Applicant: ALSTOM TECHNOLOGY LTD
    Inventor: STEPHEN A. BEDELL
  • Publication number: 20120237421
    Abstract: A method for the removal of CO2 from exhaust gases, e.g., exhaust gases from plants for pig-iron production or exhaust gases from synthesis-gas plants, includes removing CO2 using chemical and/or physical absorption, wherein the heat for regenerating the absorbent is obtained at least partially from an air separation plant. As a result, the CO2 can be separated from the exhaust gases to a greater extent than in the pressure-swing adsorption of other gases, but a lower-order energy carrier can additionally be used for this purpose.
    Type: Application
    Filed: September 7, 2010
    Publication date: September 20, 2012
    Inventors: Robert Millner, Jan-Friedemann Plaul, Johannes Leopold Schenk, Kurt Wieder
  • Publication number: 20120230896
    Abstract: The invention relates to an absorbent, comprising an aqueous solution (A) of at least one amino acid salt of the formula (I), wherein R1 and R2 independently from each other represent alkyl or hydroxyalkyl, R is hydrogen, alkyl or hydroxyalkyl, or a group R together with R1 is alkylene, M is an alkali metal, and n an integer from 1 to 6, and (B) of at least one primary alkanolamine, which is substantially free of inorganic alkaline salts. The absorbent is used in a method for removing carbon dioxide from a gas flow, particularly combustion exhaust gases. Preferred amino acid salts (A) are N,N-dimethylamino acetic acid potassium salt, N,N-diethylamino acetic acid potassium salt and N-ethyl-N-methylamino acetic acid-potassium salt. Preferred alkanolamines (B) are 2-aminoethanol, 3-aminopropanol, 4-aminobutanol, 2-aminobutanol, 5-aminopentanol, 2-aminopentanol and 2-(2-aminoethoxy)ethanol.
    Type: Application
    Filed: May 18, 2012
    Publication date: September 13, 2012
    Applicant: BASF SE Patents, Trademarks and Licenses
    Inventors: Rupert Wagner, Ute Lichtfers, Volker Schuda
  • Patent number: 8231713
    Abstract: Novel solvent composition for selective removal of COS from a gas stream containing same, said composition comprising a) at least one polyalkylene glycol alkyl ether of the formula R1O-(Alk-O)n—R2??(I) or 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone or a mixture of N-formylmorpholine and N-acetylmorpholine wherein R1 is an alkyl group having from 1 to 6 carbon atoms; R2 is hydrogen or an alkyl group having from 1 to 4 carbon atoms; Alk is an alkylene group, branched or unbranched, having from 2 to 4 carbon atoms, and n is from 1 to 10; and b) at least one alkanolamine compound of the formula R3NHR4OR6??(II) or at least one piperazine compound of formula wherein R3 is hydrogen, an alkyl group having from 1 to 6 carbon atoms, or the R4OH group; R4 is a branched or unbranched alkylene group having from 1 to 6 carbon atoms; R5, independently in each occurrence, is hydrogen or an hydroxyalkyl group having from 1 to 4 carbon atoms; and R6 is hydrogen, an alkyl group having from 1
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: July 31, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Craig N. Schubert, Arnold C. Ashcraft
  • Patent number: 8231706
    Abstract: A method for separating methane and carbon dioxide from biogas and a device are intended for purifying biogas, wherein carbon dioxide is separated off from the biogas. The method is distinguished by an energetically favorable mode of operation. The biogas is passed under atmospheric pressure and standard temperature into an absorption column. While the biogas ascends through a packed bed, which has a surface area of 600 to 1200 m2/m3, and at a space velocity of 5 to 40 Nm3/m3h, carbon dioxide present in the biogas is bound in a wash liquid by chemosorption. The purified methane gas is taken off at the top of the absorption column at a defined flow velocity. Carbon dioxide bound in the wash liquid is removed by desorption at a relatively high pressure of 2 to 30 bar and a temperature of at least 120° C. Biogas may be separated into methane and CO2.
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: July 31, 2012
    Assignee: MT-Biomethan GmbH
    Inventor: Lothar Günther
  • Patent number: 8231719
    Abstract: An absorbent liquid according to the present invention is an absorbent liquid for absorbing CO2 or H2S or both from gas, in which the absorbent liquid includes an alkanolamine as a first compound component, and a second component including a nitrogen-containing compound having in a molecule thereof two members or more selected from a primary nitrogen, a secondary nitrogen, and a tertiary nitrogen or a nitrogen-containing compound having in a molecule thereof all of primary, secondary, and tertiary nitrogens. The absorbent liquid has an excellent absorption capacity performance and an excellent absorption reaction heat performance, as compared to an aqueous solution containing solely an alkanolamine and a nitrogen-containing compound in the same concentration in terms of wt %, and can recover CO2 or H2S or both from gas with smaller energy.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: July 31, 2012
    Assignees: Mitsubishi Heavy Industries, Ltd., The Kansai Electric Power Co., Inc.
    Inventors: Ryuji Yoshiyama, Masazumi Tanoura, Noriko Watari, Shuuji Fujii, Yukihiko Inoue, Mitsuru Sakano, Tarou Ichihara, Masaki Iijima, Tomio Mimura, Yasuyuki Yagi, Kouki Ogura