Hydrogen Sulfide Patents (Class 423/573.1)
  • Patent number: 10449491
    Abstract: Provided is an integrated system for wet desulfurization using a suspension bed and regeneration, comprising a suspension bed reactor, a gas liquid separation tank, a flash evaporation tank and an oxidation regeneration tank that are connected in sequence. The integrated system is adapted to reduce the sulfur content in the hydrogen sulfide containing gas from 2.4-140 g/Nm3 to 50 ppm or less by using a suspension bed, so that the desulfurization efficiency is 98% or more. The present invention is adapted to realize regeneration of a spent desulfurizer by reacting an oxygen-containing gas with the rich solution, and the barren solution may be recycled for being used as the desulfurization slurry, without generating secondary pollution. Therefore, a process using the integrated system is simple and reasonable, with high desulfurization and regeneration efficiency, simple equipment, little occupation of land and low investment, which is very suitable for industrial promotion.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: October 22, 2019
    Assignee: Beijing Huashi United Energy Technology and Development Co., Ltd.
    Inventors: Ke Lin, Lin Li, Lixin Guo, Gang Zhao, Jun Song
  • Patent number: 10449489
    Abstract: A high efficient desulfurization-regeneration system using a suspension bed, including a suspension bed reactor, a gas liquid separation tank, a flash evaporation tank and an oxidation regeneration tank that are connected in sequence, and a fixed bed reactor connected to the exhaust port of the gas liquid separation tank. The system reduces the sulfur content in a hydrogen sulfide containing gas from 2.4-140 g/Nm3 to 50 ppm or less, and further reduces the sulfur content to less than 10 ppm in conjunction with a fixed bed. High efficient desulfurization is achieved by combining the crude desulfurization of the suspension bed with fine desulfurization of the fixed bed connected in series. The spent desulfurizer can be regenerated by reacting an oxygen-containing gas with the rich solution, and the barren solution obtained by the regeneration may be recycled for use as desulfurization slurry, without generating secondary pollution.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: October 22, 2019
    Assignee: BEIJING HUASHI UNITED ENERGY TECHNOLOGY AND DEVELOPMENT CO. LTD
    Inventors: Lin Li, Lixin Guo, Ke Lin, Gang Zhao, Jun Song
  • Patent number: 9956549
    Abstract: A new class of organic-inorganic hybrid composite materials, composites of a fluoroalkyl fluorophthalocyanine and a solid-state support containing an imidazole group. The new class of composite materials can be used as a heterogeneous catalyst for the heterogeneous oxidation organic molecules in aqueous and some organic solvents systems is claimed.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: May 1, 2018
    Assignee: Seton Hall University
    Inventors: Hemantbhai Patel, Sergiu M. Gorun
  • Patent number: 9790105
    Abstract: Described herein is a filtration medium comprising a carbon substrate having a surface of COxEy, wherein E is selected from at least one of S, Se, and Te; and wherein x is no more than 0.1 and y is 0.005 to 0.3; a filtration device comprising the filtration medium; and methods of removing chloramines from aqueous solutions.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: October 17, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Allen R. Siedle, Mark R. Stouffer
  • Patent number: 9533260
    Abstract: A method for obtaining sweet gas, synthetic gas, and sulphur from natural gas. The method includes the steps of removing impurities from the natural gas for obtaining pre-treated natural gas; sweetening the pre-treated natural gas through a separation using a plurality of membranes for obtaining sweet gas and acid gases; ionizing the acid gases to dissociate them into sulphur and synthetic gas with remnants of acid gases; and neutralizing the synthetic gas with remnants of acid gases for generating sweet gas. Likewise, a system is presented on how to implement the method.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: January 3, 2017
    Assignees: CENTRO DE INVESTIGACION EN QUIMICA APLICADA, CENTRO DE INVESTIGACION CIENTIFICA DE YUCATAN, A. C., INSTITUTO NACIONAL DE INVESTIGACIONES NUCLEARES
    Inventors: Yibran Argenis Perera Mercado, Luis Alfonso Garcia Cerda, Griselda Castruita De Leon, Luis Alberto Villarreal Cardenas, Maria Guadalupe Neira Velazquez, Manuel de Jesus Aguilar Vega, Maria Isabel de los Dolores Loria Bastarrachea, Jose Luis Santiago Garcia, Alejandra Aimee Gutierrez Mejia, Joel Osvaldo Pacheco Sotelo, Marquidia Josseline Pacheco Pacheco, Ricardo Valdivia Barrientos, Jose Fidel Ramos Flores, Miguel Angel Duran Garcia, Miguel Angel Hidalgo Perez
  • Patent number: 9221877
    Abstract: Conjugating LHRH to curcumin (LHRH-Curcumin) substantially enhances the bioavailability of curcumin, targets it to cells expressing LHRH receptors, facilitates intravenous administration, and increases the anti-cancer efficacy of curcumin. The conjugate may be used against cancer cells that express the LHRH receptor: pancreas, prostate, breast, testicular, uterine, ovarian, melanoma. LH-Curcumin conjugates may be used against cancer cells that express the LH receptor: prostate, breast, ovary, testis, uterus, pancreas, and melanoma.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: December 29, 2015
    Assignee: Board of Supervisors of Louisiana State University and Agricultural and Mechanical College
    Inventors: William Hansel, Sita Aggarwal, Robert P. Hammer
  • Patent number: 9028568
    Abstract: A system includes a carbon dioxide treatment system that includes a catalyst configured to treat carbon dioxide to produce a treated carbon dioxide. The system also includes a gasifier injector configured to inject the treated carbon dioxide, a fuel, and oxygen into a gasifier. The gasifier injector may be coupled to or located inside the gasifier.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: May 12, 2015
    Assignee: General Electric Company
    Inventors: Raymond Douglas Steele, Pradeep Stanley Thacker
  • Patent number: 9005566
    Abstract: A process for advantageously efficiently treating a sulfureous combustible effluent stream by recovering the sulfur in elemental form comprises a step of combustion of the sulfureous combustible effluent stream with an oxidant gas in excess, and then a step of post-combustion of the effluents from the combustion step with an acidic gas. The stream of the post-combustion effluents, free of chemical compounds that are harmful to the efficacy of the Claus catalysts, is treated in a Claus unit, which performs the recovery of the sulfur in elemental form.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: April 14, 2015
    Assignee: Total SA
    Inventors: Jean Nougayrede, Soufiene Maktouf
  • Patent number: 8986638
    Abstract: The present invention relates to a process for the catalytic oxidation of sulphide, mono- and/or dihydrogen sulphide, comprising the step of contacting the sulphide, mono- and/or dihydrogen sulphide in the presence of oxygen with a chelate complex comprising (i) a metal cation selected from the group consisting of Fez+, Mnz+, Niz+ and Coz+, where z=2 or 3, and (ii) a chelate ligand containing a porphyrin, a phthalocyanine or a porphyrazine ring coordinated to the metal cation, and at least one cationic substituent covalently attached to the ring in the chelate ligand.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: March 24, 2015
    Assignee: Friedrich-Alexander-Universitaet Erlanden-Nuernberg
    Inventors: Ivana Ivanovic-Burmazovic, Milos Filipovic
  • Patent number: 8968692
    Abstract: The present invention relates to a method for removing sulfur from a gaseous or liquid mixture. This method involves contacting the gaseous or liquid mixture with an iron-enriched matrix under conditions effective to remove sulfur from the mixture through adsorption of the sulfur to the matrix. The iron-enriched matrix used in this method is a lignocellulosic material that is enriched with iron. The present invention also relates to a system, composition, and plant fertilizer that contain the iron-enriched matrix. Methods of making the composition and preparing a plant fertilizer are also disclosed.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: March 3, 2015
    Assignee: Cornell University
    Inventor: Gary E. Harman
  • Publication number: 20150008368
    Abstract: A method for obtaining sweet gas, synthetic gas, and sulphur from natural gas. The method includes the steps of removing impurities from the natural gas for obtaining pre-treated natural gas; sweetening the pre-treated natural gas through a separation using a plurality of membranes for obtaining sweet gas and acid gases; ionizing the acid gases to dissociate them into sulphur and synthetic gas with remnants of acid gases; and neutralizing the synthetic gas with remnants of acid gases for generating sweet gas. Likewise, a system is presented on how to implement the method.
    Type: Application
    Filed: July 3, 2013
    Publication date: January 8, 2015
    Inventors: Yibran Argenis PERERA MERCADO, Luis Alfonso GARCIA CERDA, Griselda CASTRUITA DE LEON, Luis Alberto VILLARREAL CARDENAS, Maria Guadalupe NEIRA VELAZQUEZ, Manuel de Jesus AGUILAR VEGA, Maria Isabel de los Dolores LORIA BASTARRACHEA, Jose Luis SANTIAGO GARCIA, Alejandra Aimee GUTIERREZ MEJIA, Joel Osvaldo PACHECO SOTELO, Marquidia Josseline PACHECO PACHECO, Ricardo VALDIVIA BARRIENTOS, Jose Fidel RAMOS FLORES, Miguel Angel DURAN GARCIA, Miguel Angel HIDALGO PEREZ
  • Publication number: 20140377165
    Abstract: A process of producing degassed liquid sulfur using process gas containing H2S to agitate the liquid sulfur being degassed while in contact with a degassing catalyst. Process gas is less costly and less complicated and quickly accomplishes substantial degassing rendering the liquid sulfur much safer in storage and transportation.
    Type: Application
    Filed: June 13, 2014
    Publication date: December 25, 2014
    Applicant: PHILLIPS 66 COMPANY
    Inventor: Alfred E. Keller
  • Patent number: 8900544
    Abstract: A method for removing sulphur from a fluid by the steps of providing a first fluid comprising a sulphur-containing compound; adsorbing the sulphur of sulphur-containing compound onto an adsorbent; regenerating the adsorbent by oxidation of the adsorbed sulphur to sulphur dioxide thereby yielding an off-gas stream comprising sulphur dioxide; providing a second fluid comprising hydrogen sulphide, using the second fluid and the off-gas stream as reactants in a Claus process for producing elemental sulphur, wherein a part of hydrogen sulphide provided by the second fluid is oxidized to sulphur dioxide and water at reaction temperature, the residual hydrogen sulphide, the resulting sulphur oxide and the sulphur oxide provided by the off-gas stream are converted to elemental sulphur, the oxygen required for the oxidation of the hydrogen sulphide provided by the second fluid is provided by an air stream, and the off-gas stream dilutes the second fluid in the Claus process.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: December 2, 2014
    Assignee: Linde Aktiengesellschaft
    Inventor: Bernhard Schreiner
  • Patent number: 8871176
    Abstract: The present invention provides a process for reducing sulfur emission of a sulfur plant, wherein the sulfur plant includes a thermal reaction unit, a catalytic reaction unit and a tail-gas purification unit, the process is characterized in that the waste-gas from the degassing of the liquid sulfur in the liquid sulfur tank is introduced into the catalytic reaction unit, and/or the waste-gas from the degassing of the liquid sulfur in the liquid sulfur tank is introduced into the tail-gas purification unit. In present invention, the H2S in purified tail-gas can be reduced to no more than 10 ppm(v) and the SO2 emission concentration of the sulfur plant can be reduced to no more than 100 mg/m3.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: October 28, 2014
    Assignee: China Petroleum & Chemical Corporation
    Inventors: Aihua Liu, Yongchang Xu, Qinshu Li, Jianbang Ren, Jianli Liu, Yiling Zhang
  • Patent number: 8828351
    Abstract: Systems and methods of removing sulfur from a gas stream comprising hydrogen sulfide (H2S) is provided. The systems and methods may utilize iodine to remove sulfur from the gas stream. In certain systems and methods, the iodine may be regenerated. In particular, the present systems and methods may be capable of reducing sulfur content in a gas stream comprising hydrogen sulfide H2S gas to levels that are undetectable.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: September 9, 2014
    Assignees: Siemens Energy, Inc., Nexen Energy ULC.
    Inventors: Chad L. Felch, Matthew R Patterson, Bryan J. Kumfer, Timothy J. Schleusner, Richard Kelso Kerr
  • Patent number: 8778297
    Abstract: A sulfur recovery unit comprising: a reaction furnace configured to carry out a high-temperature Claus reaction between hydrogen-sulfide-containing gas and oxygen-containing gas introduced to the reaction furnace; a sulfur condenser configured to cool reaction gas discharged from the reaction furnace and condense sulfur contained in the reaction gas; and a pipe that connects the reaction furnace to the sulfur condenser, wherein the reaction furnace is fixed to the ground; and the sulfur condenser and the pipe are arranged so as to be able to move relative to the reaction furnace.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: July 15, 2014
    Assignee: JGC Corporation
    Inventors: Tatsuo Kamisuki, Hiroyuki Kosasayama, Yasushi Yamada, Shingo Arai, Mitsuru Kida
  • Patent number: 8722003
    Abstract: A system and method of capturing carbon dioxide from a flow of raw synthesis gas generated in a gasification system are provided. The carbon capture system includes an acid gas removal subsystem configured to generate a flow of reduced acid gas content syngas, a flow of hydrogen sulfide (H2S) lean gas, and a first flow of H2S-rich gas from a stream of particulate-free raw syngas, an H2S selective membrane separator, said H2S selective membrane separator configured to separate the flow of H2S-lean gas from the AGR into a second flow of H2S-rich gas and a flow of CO2 gas, and a sulfur recovery unit (SRU) coupled in flow communication with said H2S membrane separator downstream of said membrane separator, said SRU configured to generate a flow of elemental sulfur and a flow of tail gas from the first flow of H2S-rich gas and the second flow of H2S-rich gas.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: May 13, 2014
    Assignee: General Electric Company
    Inventors: Aaron John Avagliano, John Saunders Stevenson
  • Patent number: 8702994
    Abstract: A method for treating hydrogen sulfide in a solution includes providing the solution containing hydrogen sulfide. The method also includes adding sodium nitrite to the solution in an amount suitable to react with the hydrogen sulfide and treat the hydrogen sulfide.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: April 22, 2014
    Assignee: United Laboratories International, LLC
    Inventors: Jack G. Frost, Kenneth J. Snyder, Jr.
  • Patent number: 8685236
    Abstract: A method of removing contaminates from sour water is provided. The method includes producing raw sour water within a syngas production system, and removing the contaminates from the raw sour water using a chemical reaction within a treatment unit to produce treated sour water. The treatment unit is in flow communication with the syngas production system.
    Type: Grant
    Filed: August 20, 2009
    Date of Patent: April 1, 2014
    Assignee: General Electric Company
    Inventor: Gary Daniel Miller
  • Patent number: 8668894
    Abstract: The present invention relates to a method for processing a sulfur-containing gas and a hydrogenation catalyst used therefor. The method comprises introducing the sulfur-containing gas into the tail gas hydrogenation unit of a sulfur recovery device, processing it with the hydrogenation catalyst of the present invention, and absorbing the hydrogenated tail gas with a solvent. The hydrogenation catalyst comprises from 0.5 to 3 wt. % of an active component nickel oxide, from 1 to 4 wt. % of an active component cobalt oxide, from 8 to 20 wt. % of an active component molybdenum oxide or tungsten oxide, from 1 to 5 wt. % of a deoxidation auxiliary agent, from 10 to 40 wt. % of TiO2, the balance being ?-Al2O3, based on the weight of the catalyst.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: March 11, 2014
    Assignees: China Petroleum & Chemical Corporation, Research Institute of Petroleum Processing, Sinopec
    Inventors: Aihua Liu, Yiling Zhang, Xingzhong Xu, Jianli Liu, Weidong Tao, Jinshan Xu
  • Patent number: 8664462
    Abstract: A method of processing feed streams high in hydrogen sulfide is provided. The method includes providing a feed gas stream that includes hydrocarbons and at least 5 vol % hydrogen sulfide. At least a portion of the feed gas stream is separated into a hydrogen sulfide stream and a hydrocarbon stream. The hydrocarbon gas stream is processed to produce natural gas. At least 34 mol. % of the hydrogen sulfide in the hydrogen sulfide stream is combusted with an oxidant to generate thermal power. Thermal power generated by the combustion is utilized in one or more of the steps of separating the feed gas stream into the hydrogen sulfide stream and the hydrocarbon gas stream, and processing the hydrocarbon gas stream to produce natural gas, compressed natural gas, or liquefied natural gas.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: March 4, 2014
    Assignee: Shell Oil Company
    Inventors: Stanley Nemec Milam, Ann Marie Lauritzen, Michael Anthony Reynolds, Eswarachandra Kumar Paruchuri, Scott Lee Wellington
  • Patent number: 8652435
    Abstract: An improved process for reduction-oxidation desulphurization uses an oxidizer operating at a pressure greater than the absorber where a liquid reduction-oxidation catalyst solution contacts a sulfur-containing gas feed stream.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: February 18, 2014
    Assignee: Merichem Company
    Inventor: Gary J. Nagl
  • Patent number: 8650876
    Abstract: Ammonia sometimes present in geothermal steam increases the solubility of hydrogen sulfide in the steam condensate produced by the surface condenser in a steam cycle geothermal power generating unit by reacting with the hydrogen sulfide to produce nonvolatile ammonium bisulfide. The condenser vent gas also produced contains carbon dioxide. Contacting the steam condensate with the condenser vent gas at a pressure slightly greater than atmospheric causes carbon dioxide to dissolve in the condensate, decreasing pH and converting bisulfide ion back to hydrogen sulfide. Subsequently exposing the acidified condensate to condenser vacuum strips the hydrogen sulfide from the condensate, eliminating the need for further chemical treatment of the condensate to prevent air pollution. Hydrogen sulfide partitioning performance is further improved by converting the hydrogen sulfide in the vent gas to sulfur dioxide before contacting it with the condensate.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: February 18, 2014
    Assignee: ChemTreat, Inc.
    Inventor: Oleh Weres
  • Patent number: 8598059
    Abstract: The present invention relates to a process for sulfurizing a hydrocarbon treatment catalyst, comprising: at least a first step of depositing, on the surface of the catalyst, one or more sulfurization auxiliaries of formula (I): and at least a second step, carried out after the first step, of placing the catalyst in contact with a sulfur-containing gaseous mixture containing hydrogen and a sulfur compound. This process does not comprise the deposit of any carbon sources other than the auxiliary of formula (I).
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: December 3, 2013
    Assignee: Eurecat S.A.
    Inventors: Pierre Dufresne, Eric Nagy, Pauline Galliou
  • Patent number: 8597581
    Abstract: A system may include a sulfur recovery unit. The sulfur recovery unit may include an acid gas supply, which may supply acid gas, an oxygen supply, which may supply oxygen, a fuel supply, which may supply fuel. The fuel may have a higher heating value than the acid gas. Also, the sulfur recovery unit may include a thermal reaction zone, which may thermally recover sulfur from the acid gas by combustion of the fuel and the acid gas with the oxygen and through reaction of the acid gas with combustion products arising from the combustion.
    Type: Grant
    Filed: January 4, 2010
    Date of Patent: December 3, 2013
    Assignee: General Electric Company
    Inventors: Sachin Suhas Naphad, Ganesh Prasadh Kidambi
  • Patent number: 8591846
    Abstract: A method and apparatus for processing a sour gas rich in carbon dioxide in a Claus process, so sulfur compounds are removed by a selective solvent in a gas scrubbing process. Sulfur components and carbon dioxide, are separated into at least two sour gas fractions, wherein at least one sour gas fraction having a higher content of sulfur components is obtained, wherein the fraction having the highest hydrogen sulfide content is introduced in the thermal reaction stage of the Claus furnace with a gas containing oxygen by means of a burner. The sulfur is converted to sulfur dioxide in the thermal reaction stage of the Claus furnace and exhaust gases are discharged into the closed Claus reaction chamber behind the burner. The remaining sour gas fractions stripped of sulfur components are fed to the Claus reaction chamber and are mixed with the combustion gases leaving the burner.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: November 26, 2013
    Assignee: Thyssenkrupp UHDE GmbH
    Inventor: Johannes Menzel
  • Patent number: 8580208
    Abstract: The present invention describes a reactor (1) for continuously preparing hydrogen sulfide H2S from hydrogen and sulfur, comprising a distributor device (15) for distributing gaseous hydrogen in a sulfur melt (9) present at least in a lower part of the reactor. The distributor device (15) is arranged in the sulfur melt (9) and comprises a distributor plate (16) which is arranged in the reactor (1) and has an edge (17) extending downward and, if appropriate, has passage orifices (19). The hydrogen from a hydrogen bubble which forms below the distributor plate (16) is (for example through the passage orifices (19)) distributed in the sulfur melt (9) via the distributor plate (16).
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: November 12, 2013
    Assignee: BASF SE
    Inventors: Andreas Woelfert, Herald Jachow, Heinz Driess
  • Patent number: 8574539
    Abstract: The present invention provides a process for the selective oxidation of hydrogen sulphide in a hydrogen sulphide-containing hydrocarbon and/or hydrogen feed gas to elemental sulphur in a reaction zone containing a Claus catalyst, comprising the steps of: i) reacting in the reaction zone the hydrogen sulphide in the hydrogen sulphide-containing hydrocarbon and/or hydrogen feed gas with sulphur dioxide at a pressure in the range of from 4 to 200 bar (absolute) and a temperature in the range of from 120 and 160° C., such that the elemental sulphur formed is essentially in liquid form; ii) contacting the catalyst with a reducing atmosphere at elevated temperatures.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: November 5, 2013
    Assignee: Shell Oil Company
    Inventors: Ronald Jan Schoonebeek, Sipke Hidde Wadman
  • Patent number: 8568676
    Abstract: A process for workup of an industrial carbon dioxide-rich gas to be freed of sulfur components, in which an industrial gas to be freed of sulfur components is purified by a gas scrubbing, and the laden solvent is freed of carbon dioxide and hydrogen sulfide by a regeneration to obtain at least one acid gas fraction having a relatively high content of sulfur components, and the fraction with the highest hydrogen sulfide (H2S) content is supplied to a Claus plant with downstream Claus process gas hydrogenation, and at least one carbon dioxide-laden, low-hydrogen sulfide acid gas fraction from the regeneration device, which has a reduced sulfur content compared to the fraction with the highest hydrogen sulfide (H2S) content, is combined with the hydrogenated Claus process gas to give a combined process gas stream, which is supplied to further processing or to recycling into the process.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: October 29, 2013
    Assignee: Thyssenkrupp Uhde GmbH
    Inventor: Johannes Menzel
  • Patent number: 8545793
    Abstract: A device for condensing, separating, and storing sulfur in a Claus plant. having a Claus furnace, waste heat boiler, and Claus reactor. Plant parts are supported on a floor or comparable device, and an immersion chamber is provided below the Claus plant and optionally also below a device arranged upstream for gas scrubbing. The immersion chamber receives the sulfur in a siphoning manner, wherein the excess sulfur flows at least 4.00 meters deeper from the immersion chamber into a ground-level container in which the immersion chamber is arranged. The invention further relates to a method, by means of which liquid sulfur is conducted into an immersion chamber, wherein the immersion chamber is arranged at a height level below the waste heat boiler and the Claus reactor so that the liquid sulfur reaches the immersion chamber without further pumping and overcomes a height difference of at least 4.00 meters.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: October 1, 2013
    Assignee: Thyssenkrupp UHDE GmbH
    Inventor: Holger Thielert
  • Patent number: 8527071
    Abstract: Control of a process for producing free sulfur from hydrogen sulfide is accomplished by manipulating the flow rate of a feed stream containing oxygen to a furnace in such a manner that a desired proportion of the hydrogen sulfide fed to the furnace is converted to sulfur dioxide. Combustion of hydrogen sulfide is precisely controlled by the proposed system to maintain the hydrogen sulfide and sulfur dioxide concentrations in the tail gas at acceptable levels to minimize the environmental pollution.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: September 3, 2013
    Assignee: IMB Controls Inc.
    Inventor: Igor Boiko
  • Patent number: 8501149
    Abstract: Systems and methods of removing sulfur from a gas stream comprising hydrogen sulfide (H2S) are provided. The systems and methods may utilize iodine to remove sulfur from the gas stream. In certain systems and methods, the iodine may be regenerated. In particular, the present systems and methods may be capable of reducing sulfur content in a gas stream comprising hydrogen sulfide H2S gas to levels that are undetectable.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: August 6, 2013
    Assignee: Siemens Energy, Inc.
    Inventors: Chad L. Felch, Matthew Patterson, Bryan J. Kumfer, Timothy J. Schleusner, Richard Kelso Kerr
  • Patent number: 8501135
    Abstract: A method of reducing sulfur compounds from an incoming gas stream, comprising flowing the gas stream over a hydrolysis catalyst to convert COS and CS2 to H2S and reduce SO2 to elemental sulfur to form an effluent stream; providing an acidic gas removal unit comprising an absorbent; flowing said effluent stream over said absorbent to produce a stream free of acidic gases; applying an acidic-gas desorption mode to said acidic-gas rich absorbent to produce an acidic gas stream; introducing oxygen to said acidic gas-rich stream; providing a direct oxidation vessel containing catalyst suitable for catalyzing the oxidation of the H2S to sulfur wherein the temperature of the vessel is at or above the sulfur dew point at the reaction pressure; and flowing said acidic gas-rich stream over said catalyst to produce a processed stream having a reduced level of sulfur compounds.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: August 6, 2013
    Assignee: Archon Technologies Ltd.
    Inventors: Alan Ayasse, Ahmed M. Shahin, Conrad Ayasse
  • Patent number: 8496906
    Abstract: A biological process for removing hydrogen sulphide from biogas is disclosed. The process involves injecting a small quantity of air into the gas phase or the liquid phase of a psychrophilic bioreactor to allow microbial flora to convert the hydrogen sulphide into elemental sulphur.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: July 30, 2013
    Assignees: Her Majesty the Queen in right of Canada as represented by the Minister of Agriculture and Agrifood, Bio-Terre Systems Inc.
    Inventors: Daniel I. Massé, Steve Boivin
  • Patent number: 8486365
    Abstract: To minimize the inhibitory effect of sulfur on the oxidation of hydrogen sulfide with oxygen in a gas stream on the solid catalysts, first, the elemental sulfur content in the gas stream is reduced to less than 3.0 mg/l, preferably 0.3 mg/l, and second, the temperature in the oxidation reactor is maintained so that the relative vapor pressure of sulfur in it remains less than 0.25, preferably less than 0.1. The removal of sulfur from the gas stream by washing it with water or aqueous solution decreases the ignition temperature of the process to 155-160° C. Because of this the initial concentration of H2S might be elevate up to about 2% for a regular adiabatic reactor and to 10% by volume for a reactor with a heat-redistributing system.
    Type: Grant
    Filed: April 1, 2012
    Date of Patent: July 16, 2013
    Inventor: Tofik Gasan Alkhazov
  • Patent number: 8449860
    Abstract: Method and system are presented for the combustion of hydrogen sulfide mixed with other gases for simultaneous recovery of sulfur and energy from hydrogen sulfide at higher efficiency. The amounts and velocity of the hydrogen sulfide into the reactor is selected in such a way that it is not possible to burn the hydrogen sulfide in a normal thin reaction zone during its combustion. The injected hydrogen sulfide gas is mixed in a thermal reactor with fresh air and hot active combustion gases in the reactor on account of internal jet pump effect and self-induced entrainment. The reaction is exothermic so that the chemical energy present in hydrogen sulfide is recovered together with the sulfur. Various reactors are shown capable of controlling the formation of a thermal distribution flow pattern based on the position, and position and direction (and other factors) regarding fluid introduction within a combustion chamber of the reactors.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: May 28, 2013
    Assignee: University of Maryland
    Inventor: Ashwani K. Gupta
  • Patent number: 8425874
    Abstract: The reduction of the gas stream containing sulfur dioxide to elemental sulfur is carried out by reacting a reducing gas, such as natural gas, methanol or a mixture of hydrogen and carbon monoxide, with recycled sulfur and recycled tail gas to produce a stream containing hydrogen sulfide that may be reacted with the gas stream that contains sulfur dioxide. Gas streams with a molar concentration of sulfur dioxide from 1 to 100% may be processed to achieve nearly 100% sulfur recovery efficiency.
    Type: Grant
    Filed: June 4, 2011
    Date of Patent: April 23, 2013
    Assignee: Rameshni & Associates Technology & Engineering
    Inventors: Mahin Rameshni, Stephen L Santo
  • Patent number: 8377402
    Abstract: Oxidative and reductive methods are described for the cost-effective destruction of an ammonia-bearing gas stream, potentially containing minor but significant quantities of hydrogen sulfide (H2S), in a conventional Claus sulfur recovery tail gas treating unit, using controlled rates and compositions of combustion gases in order to obtain the temperatures necessary for the desired destruction of unwanted combustibles.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: February 19, 2013
    Assignee: WorleyParsons Group, Inc.
    Inventor: Mahin Rameshni
  • Publication number: 20120213694
    Abstract: Systems and methods of removing sulfur from a gas stream comprising hydrogen sulfide (H2S) are provided. The systems and methods may utilize iodine to remove sulfur from the gas stream. In certain systems and methods, the iodine may be regenerated. In particular, the present systems and methods may be capable of reducing sulfur content in a gas stream comprising hydrogen sulfide H2S gas to levels that are undetectable.
    Type: Application
    Filed: February 17, 2012
    Publication date: August 23, 2012
    Applicants: NEXEN INC., SIEMENS INDUSTRY, INC.
    Inventors: Chad L. Felch, Matthew Patterson, Bryan J. Kumfer, Timothy J. Schleusner, Richard Kelso Kerr
  • Patent number: 8241603
    Abstract: A multi-stage UCSRP process and system for removal of sulfur from a gaseous stream in which the gaseous stream, which contains a first amount of H2S, is provided to a first stage UCSRP reactor vessel operating in an excess SO2 mode at a first amount of SO2, producing an effluent gas having a reduced amount of SO2, and in which the effluent gas is provided to a second stage UCSRP reactor vessel operating in an excess H2S mode, producing a product gas having an amount of H2S less than said first amount of H2S.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: August 14, 2012
    Assignee: Gas Technology Institute
    Inventors: Arunabha Basu, Howard S. Meyer, Scott Lynn, Dennis Leppin, James R. Wangerow
  • Patent number: 8236276
    Abstract: A sulfur recovery system for recovering sulfur from a sulfur plant feed stream including a first sulfur removal system and a second sulfur removal system. The system includes a sulfur plant feed inlet to the first sulfur removal system, the sulfur plant feed inlet being capable of providing a sulfur plant feed stream at a first pressure. One or more oxidizing gas inlets are arranged and disposed to combine at least one oxidizing gas stream with the sulfur plant feed stream to form a combustion gas for combustion in the first sulfur removal system at a second pressure. A flow restriction device is operably configured to control an operating pressure in one or both of the first sulfur removal system and the second sulfur removal system. A gas processing plant and method for recovering sulfur from a sulfur plant feed stream are also disclosed.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: August 7, 2012
    Assignee: Fluor Enterprises, Inc.
    Inventors: Xianming Jimmy Li, Elmo Nasato, Jung Soo Choe
  • Patent number: 8206669
    Abstract: A feed gas comprising CO2, H2S and H2 is treated to produce an H2-enriched product and a CO2 product. The feed gas is separated by pressure swing adsorption to provide a stream of the H2-enriched product, and two streams of sour gas depleted in H2 and enriched in H2S and CO2 relative to the feed gas. One of the streams of sour gas is processed in an H2S to elemental sulfur conversion system, in which H2S in the sour gas is converted to elemental sulfur order to obtain a stream of sweetened gas, from which the CO2 product is formed. The other of said streams of sour gas is processed in an oxidation system, in which H2S in the sour gas is oxidized to SOx(SO2 and SO3) which is introduced into the H2S to elemental sulfur conversion system.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: June 26, 2012
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Charles Linford Schaffer, Andrew David Wright, Kevin Boyle Fogash, Jeffrey William Kloosterman, Vincent White
  • Patent number: 8178070
    Abstract: A Claus plant with multiple parallel thermal stages that provide a combined effluent to downstream catalytic stages includes a controller that allows independent and individual control for each of the thermal stages as a function of measured chemical composition of the thermal stage effluents and catalytic stage effluent.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: May 15, 2012
    Assignee: Fluor Technologies Corporation
    Inventors: Vincent Wai Wong, Thomas King Chow, John Gebur
  • Publication number: 20120076721
    Abstract: A process and system for substantially eliminating contaminants from a gas and a gas produced therefrom.
    Type: Application
    Filed: October 17, 2011
    Publication date: March 29, 2012
    Applicant: SWAPSOL CORP.
    Inventor: James A. Wasas
  • Patent number: 8137634
    Abstract: The invention relates to a fission reactor (1) for a Claus plant, comprising a fireproof lined boiler (9), which contains a combustion chamber (2) with an influx opening for a mixture of fuel gas, air and acid gas containing H2S, a catalyst chamber (10) with a catalyst bed and a chamber on the outflow side (11) comprising a gas outlet for a hot process gas that contains elemental sulphur. According to the invention, the boiler is configured as a horizontal cylindrical boiler, in which the combustion chamber (2), the catalyst chamber and the chamber on the outflow side (11) are located next to one another. The catalyst chamber is delimited on both sides in the flow direction by gas-permeable chequer bricks (14) and has a fill opening (15) on the shell side for introducing the catalyst bed.
    Type: Grant
    Filed: May 10, 2003
    Date of Patent: March 20, 2012
    Assignee: Uhde GmbH
    Inventor: Holger Thielert
  • Publication number: 20120039780
    Abstract: An apparatus for treating headspace gas has a production water tank, a shource of at least one of oxygen and ozone, a diffuser, and a reaction tank. The production water tank contains a headspace gas and a headspace gas outlet. At least a portion of the headspace gas is a sulfide gas. The diffuser diffuses a mixture of the at least one of oxygen and ozone and headspace gas from the production water tank via the headspace gas outlet into a liquid solvent. The at least one of oxygen and ozone oxidizes at least a portion of the sulfide gas as they pass through the diffuser. The reaction tank for receives the liquid solvent.
    Type: Application
    Filed: August 10, 2011
    Publication date: February 16, 2012
    Applicant: SEAIR INC.
    Inventors: Harold Kinasewich, Kyle Greene, Todd J. Webb
  • Patent number: 8062619
    Abstract: A process and apparatus for the treatment of a gas that contains hydrogen sulfide and sulfurous anhydride, in which: a) the gas (3) contacts with an organic solvent (1) containing a catalyst in a gas-liquid reactor-contactor (2) so as to recover separately liquid sulfur and; a gas effluent containing sulfur vapor; subjecting the gas effluent to a first condensation zone (7) operating at 70-100° C. to deposit the sulfur in solid form on sufficiently cold walls of the equipment in zone (7), recovering resultant purified gas containing less than 30 ppm by volume of sulfur melting the deposited solid sulfur to regenerate the equipment, and recycling resultant liquefied sulfur to the reactor contactor.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: November 22, 2011
    Assignee: IFP Energies Nouvelles
    Inventors: Julien Grandjean, Nicolas Ferrando, Abdelhakim Koudil, P-Louis Carrette
  • Patent number: 8021624
    Abstract: The invention relates to a reactor (1) and a process for continuously preparing H2S by converting a reactant mixture which comprises essentially gaseous sulfur and hydrogen over a catalyst, comprising a sulfur melt (9) at least in a lower subregion (8) of the reactor (1), into which gaseous hydrogen is introduced. The catalyst is arranged in at least one U-shaped tube (21) which is partly in contact with the sulfur melt (9), the at least one U-shaped tube (21) having at least one entry orifice (23) on a limb (26) above the sulfur melt (9), through which the reactant mixture can enter the U-shaped tube (21) from a reactant region (10) of the reactor (1), having a flow path within the at least one U-shaped tube, along which the reactant mixture can be converted in a reaction region comprising the catalyst (22), and having at least one exit orifice (24) in another limb (27) through which a product can exit into a product region (7).
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: September 20, 2011
    Assignee: BASF SE
    Inventors: Andreas Wölfert, Herald Jachow, Heinz Drieβ
  • Patent number: 8012441
    Abstract: The invention relates to a method for isolating hydrogen sulphide from coke-oven gas with the subsequent recovery of elemental sulphur in a Claus plant. The hydrogen sulphide is eliminated from the coke-oven gas by gas washing using an absorption liquid. During the regeneration of the loaded absorption liquid, hydrogen sulphide is accumulated in concentrated form and is fed to the Claus plant. Said Claus plant comprises a Claus boiler, a waste-heat boiler, in addition to a reactor, which forms an additional catalyst stage. According to the invention, the Claus plant is operated with a single reactor, which operates at a working temperature of below 250° C. The process gas that exits the reactor is returned after the deposition of elemental sulphur with a non-reacted residual concentration of hydrogen sulphide to the coke-oven gas that is to be cleaned, prior to the gas washing stage.
    Type: Grant
    Filed: May 10, 2003
    Date of Patent: September 6, 2011
    Assignee: Uhde GmbH
    Inventor: Holger Thielert
  • Patent number: 7988767
    Abstract: Contemplated configurations and methods for elemental sulfur removal from various gases, and especially well acid gases employ a hydrocarbon solvent that dissolves the sulfur to form a rich solvent and that is then regenerated by hydrotreating. Thus, sulfur is removed from the rich solvent as H2S that may then be processed (e.g., in Claus unit or absorption unit) while the regenerated solvent is routed back to the well and associated production pipes.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: August 2, 2011
    Assignee: Fluor Technologies Corporation
    Inventors: Curt Graham, Robert Henderson, Richard B. Nielsen, Michael Debest