Hydrogen Sulfide Patents (Class 423/563)
  • Patent number: 10336614
    Abstract: The present invention discloses a hydrogen sulfide reactor vessel with an external heating system that is conductively and removably attached to an exterior portion of the reactor vessel. Also disclosed are processes for producing hydrogen sulfide utilizing the reactor vessel.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: July 2, 2019
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Daniel M. Hasenberg, Alex Pauwels, Ives Mertens
  • Patent number: 10040684
    Abstract: The present invention discloses a hydrogen sulfide reactor vessel with an external heating system that is conductively and removably attached to an exterior portion of the reactor vessel. Also disclosed are processes for producing hydrogen sulfide utilizing the reactor vessel.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: August 7, 2018
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Daniel M Hasenberg, Alex Pauwels, Ives Mertens
  • Patent number: 9421511
    Abstract: The present invention relates to a reactor and to a process for synthesis of hydrogen sulphide from elemental sulphur and hydrogen at elevated pressure and elevated temperature. The invention further relates to the use of the reactor for preparation of hydrogen sulphide in high yield and with a low H2Sx content.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: August 23, 2016
    Assignee: Evonik Degussa GmbH
    Inventors: Caspar-Heinrich Finkeldei, Chiu Kee Cheung, Ralf Maassen, Stefan Wenner, Martin Koerfer
  • Patent number: 9278314
    Abstract: The objective of this invention is to develop a method to reclaim functional sites on a CO2 sorbent that have reacted with an acid gas (other than CO2) to form heat stable salts (HSS). HSS are a significant concern for dry sorbent based CO2 capture because over time the buildup of HSS will reduce the overall functionality of the CO2 sorbent. A chemical treatment can remove the non-CO2 acid gas and reclaim functional sites that can then be used for further CO2 adsorption.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: March 8, 2016
    Assignee: ADA-ES, Inc.
    Inventors: Holly Krutka, Sharon Sjostrom, William J. Morris
  • Patent number: 9192888
    Abstract: Embodiments of apparatuses and methods for removing acid gas from sour gas are provided. In one example, an apparatus comprises an absorption zone. The absorption zone is configured for contacting the sour gas with an absorbent solvent that is at a first predetermined temperature of less than about 0° C. to remove the acid gas and form a treated gas stream that includes entrained absorbent solvent. A heat exchanger or heater is configured to heat the treated gas stream to a second predetermined temperature of greater than about 0° C. to form a partially heated treated gas stream. A water wash zone is configured for contacting the partially heated treated gas stream with water to remove the entrained absorbent solvent and form a solvent-depleted treated gas stream.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: November 24, 2015
    Assignee: UOP LLC
    Inventors: Keyur Y. Pandya, David A. Wegerer, Clayton Colin Sadler
  • Publication number: 20150044126
    Abstract: An object is to provide a hydrogen sulfide gas production plant that can recover discharged waste hydrogen sulfide gas and efficiently supply the gas to a process plant where processing is conducted by using hydrogen sulfide gas, and also provide a method for recovering and using the waste hydrogen sulfide gas by the hydrogen sulfide gas production plant. In the present invention, the hydrogen sulfide gas production plant is provided with a pipe that recovers the waste hydrogen sulfide gas discharged from the hydrogen sulfide gas production plant and that has one end connected to the process plant where the hydrogen sulfide gas is used, and the discharged waste hydrogen sulfide gas is recovered and the recovered waste hydrogen sulfide gas is supplied to the process plant through the pipe.
    Type: Application
    Filed: January 7, 2013
    Publication date: February 12, 2015
    Inventors: Osamu Nakai, Satoshi Matsubara, Tomoyuki Hirose, Masafumi Nakamura
  • Publication number: 20150034500
    Abstract: A metal organic framework (MOF) includes a coordination product of a metal ion and an at least bidentate organic ligand, where the metal ion and the organic ligand are selected to provide a deliverable adsorption capacity of at least 70 g/l for an electronic gas. A porous organic polymer (POP) includes polymerization product from at least a plurality of organic monomers, where the organic monomers are selected to provide a deliverable adsorption capacity of at least 70 g/l for an electronic gas.
    Type: Application
    Filed: August 4, 2014
    Publication date: February 5, 2015
    Inventors: Han Sung KIM, Mitchell Hugh WESTON, Patrick FULLER, Paul Wai-Man SIU
  • Publication number: 20150030524
    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: Application
    Filed: July 23, 2013
    Publication date: January 29, 2015
    Inventors: Lei JI, Ai-Fu CHANG, Michael S. Driver, Hye-Kyung Timken
  • Publication number: 20140363361
    Abstract: The disclosure provides an LS methane hydrate containing a plurality of methane hydrate crystals and lignosulfonate. The disclosure also provides a method of making an LS methane hydrate by combining methane gas, liquid or solid water, and LS at controlled temperature and starting pressure for a time sufficient to form LS methane hydrate. The disclosure further provides a method of producing energy from an LS methane hydrate by providing an LS methane hydrate directly to a combustion chamber, whereby methane in the methane hydrate and LS are converted to energy in the combustion chamber and water in the methane hydrate is converted to steam. The disclosure additionally provides a method of releasing methane from an LS methane hydrate by heating an LS methane hydrate.
    Type: Application
    Filed: August 26, 2014
    Publication date: December 11, 2014
    Applicant: THE TEXAS STATE UNIVERSITY-SAN MARCOS
    Inventors: Weixing Wang, Luyi Sun
  • Patent number: 8765451
    Abstract: The present invention provides a method of treating an off-gas stream (80) comprising NH3 and H2S to provide a sulphate stream (910), the method comprising the steps of: (i) providing a first off-gas stream (80) comprising NH3, H2S, CO2 and optionally one or more of HCN, COS and CS2; (ii) passing the first off-gas stream (80) to an incinerator (300) to oxidize NH3, H2S, and optionally one or more of HCN, COS and CS2 to provide a second off-gas stream (310) comprising N2, H2O, SO2 and CO2; (iii) scrubbing the second off-gas stream (310) with a first aqueous alkaline stream (380, 876a) in a caustic scrubber (350) to separate SO2 and a part of the CO2 from the second off-gas stream to provide a spent caustic stream (360) comprising carbonate and one or both of sulphite and bisulphite and a caustic scrubber off-gas stream (370) comprising N2 and CO2; and (iv) passing the spent caustic stream (360) to an aerator (900) comprising sulphur-oxidizing bacteria in the presence of oxygen to biologically oxidize sulphite
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: July 1, 2014
    Assignee: Shell Oil Company
    Inventor: Sandra Schreuder
  • 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: 8551442
    Abstract: A reactor for synthesizing hydrogen sulfide in which sulfur and hydrogen are subjected to gas-phase reaction in the absence of a catalyst to synthesize hydrogen sulfide, the reactor including: a reactor body that retains liquid sulfur in a bottom portion thereof; a heating unit that gasifies part of the liquid sulfur; a hydrogen gas supply unit that supplies hydrogen gas into the liquid sulfur; and a heat-exchanging portion provided in a gas-phase reaction region located above the liquid surface of the liquid sulfur in the reactor body, wherein heat-exchanging portion is configured such that the reaction temperature in the gas-phase reaction region is controlled to be within a predetermined temperature range by changing the heat exchange amount per unit volume in a gas-phase reaction region located farther from the liquid surface from the heat exchange amount per unit volume in a gas-phase reaction region located closer to the liquid surface.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: October 8, 2013
    Assignee: JGC Corporation
    Inventors: Hiroshi Umino, Nobuhiro Yamada, Tsutomu Katagiri, Hiromitsu Shibuya, Shuichi Oguro, Naoyoshi Iwasaki
  • Publication number: 20130177496
    Abstract: A reactor for synthesizing hydrogen sulfide in which sulfur and hydrogen are subjected to gas-phase reaction in the absence of a catalyst to synthesize hydrogen sulfide, the reactor including: a reactor body that retains liquid sulfur in a bottom portion thereof; a heating unit that gasifies part of the liquid sulfur; a hydrogen gas supply unit that supplies hydrogen gas into the liquid sulfur; and a heat-exchanging portion provided in a gas-phase reaction region located above the liquid surface of the liquid sulfur in the reactor body, wherein heat-exchanging portion is configured such that the reaction temperature in the gas-phase reaction region is controlled to be within a predetermined temperature range by changing the heat exchange amount per unit volume in a gas-phase reaction region located farther from the liquid surface from the heat exchange amount per unit volume in a gas-phase reaction region located closer to the liquid surface.
    Type: Application
    Filed: March 1, 2013
    Publication date: July 11, 2013
    Applicant: JGC CORPORATION
    Inventors: HIROSHI UMINO, NOBUHIRO YAMADA, TSUTOMU KATAGIRI, HIROMITSU SHIBUYA, SHUICHI OGURO, NAOYOSHI IWASAKI
  • Patent number: 8377310
    Abstract: Toxic substances such as heavy metals are extracted from a medium using a sorbent composition. The sorbent composition is derived by sulfidation of red mud, which contains hydrated ferric oxides derived from the Bayer processing of bauxite ores. Exemplary sulfidizing compounds are H2S, Na2S, K2S, (NH4)2S, and CaSx. The sulfur content typically is from about 0.2 to about 10% above the residual sulfur in the red mud. Sulfidized red mud is an improved sorbent compared to red mud for most of the heavy metals tested (Hg, Cr, Pb, Cu, Zn, Cd, Se, Th, and U). Unlike red mud, sulfidized red mud does not leach naturally contained metals. Sulfidized red mud also prevents leaching of metals when mixed with red mud. Mixtures of sulfidized red mud and red mud are more effective for sorbing other ions, such as As, Co, Mn, and Sr, than sulfidized red mud alone.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: February 19, 2013
    Assignee: J.I. Enterprises, Inc.
    Inventor: Joseph Iannicelli
  • Patent number: 8226986
    Abstract: The present invention provides novel stable, liquid compositions comprising chalcogenides or salts thereof. These compositions may be used for a variety of purposes, including the treatment and prevention of ischemic or hypoxic injury, as well as in the preservation of biological matter.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: July 24, 2012
    Assignee: Ikaria, Inc.
    Inventors: Kevin J. Tomaselli, Paul A. Hill, Thomas L. Deckwerth, Edward A. Wintner, Csaba Szabo
  • 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
  • Publication number: 20110220551
    Abstract: Sulfhydryl compounds, including hydrogen sulfide and mercaptans, may be removed from a fluid or gaseous stream or substrate by reacting the hydrogen sulfide and mercaptans in the stream with a scavenger of the structural formula: wherein R1, R2 and R3 are each independently selected from the group consisting of R4 and R5, R4 is a C1-C20 straight or branched chain alkyl group, R5 is —[(CH)m—NH]p—(CH2)nOH, n and m are independently an integer from 2 to about 6, p is from 1 to about 6; and wherein at least one of R1, R2 and R3 is R4 and at least one of R1, R2 and R3 is R5.
    Type: Application
    Filed: March 12, 2010
    Publication date: September 15, 2011
    Inventor: Grahame N. Taylor
  • 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: 7923037
    Abstract: The present invention provides novel stable, liquid compositions comprising chalcogenides or salts thereof. These compositions may be used for a variety of purposes, including the treatment and prevention of ischemic or hypoxic injury, as well as in the preservation of biological matter.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: April 12, 2011
    Assignee: Ikaria, Inc.
    Inventors: Kevin J. Tomaselli, Paul A. Hill, Thomas L. Deckwerth, Edward Wintner, Csaba Szabo
  • Patent number: 7887777
    Abstract: Hydrogen sulfide H2S is prepared from a crude gas stream containing H2S and polysulfanes (H2Sx). The crude gas stream is passed at temperatures of from 114 to 165° C. through catalytically active material present in a vessel, and sulfur is collected in the bottom of the vessel and recycled to the preparation of H2S. This process may be accomplished in an apparatus including a reactor for reacting sulfur and hydrogen, a cooler for receiving and cooling an H2S-containing crude gas stream passed out of the reactor to between 114 to 165° C., a vessel coupled to the cooler, the vessel including catalytically active material and a bottom for collecting sulfur obtained from the crude gas stream, and a line which is connected to the bottom of the vessel and opens into the cooler or into the reactor, for recycling sulfur.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: February 15, 2011
    Assignee: BASF SE
    Inventors: Andreas Wölfert, Herald Jachow, Heinz Drieβ
  • Patent number: 7871594
    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: January 10, 2008
    Date of Patent: January 18, 2011
    Assignee: BASF SE
    Inventors: Andreas Wölfert, Herald Jachow, Heinz Drieβ
  • Patent number: 7854915
    Abstract: The invention relates to a method of producing sulfuric acid wherein an SO2-containing raw gas produced in a sulfuric-acid recovery plant is passed through at least one reactor in which a catalytic reaction of SO2 to SO3 takes place, and the SO3 thereby formed is converted into sulfuric acid. According to the invention, at least a partial stream of the gas stream leaving the sulfuric-acid recovery plant is hydrogenated with an H2-rich gas in a post-treatment stage. The H2S-containing gas stream formed by the hydrogenation is fed into the H2S gas scrubber of a coke oven plant or a petrochemical plant. The invention also relates to an installation for carrying out the method.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: December 21, 2010
    Assignee: Uhde GmbH
    Inventor: Holger Thielert
  • Patent number: 7833508
    Abstract: The invention relates to a reaction vessel in which hydrogen sulphide is prepared from sulphur and hydrogen, wherein the reaction vessel consists partly or entirely of a material which is resistant to the reaction mixture, its compounds or elements and retains its resistance even at high temperatures.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: November 16, 2010
    Assignee: Evonik Degussa GmbH
    Inventors: Hubert Redlingshöfer, Jan-Olaf Barth, Caspar-Heinrich Finkeldei, Hans Joachim Hasselbach, Stephan Kretz, Harald Heinzel, Christoph Weckbecker
  • Patent number: 7833509
    Abstract: The invention relates to a process and to an apparatus for preparing hydrogen sulfide H2S by converting a reactant mixture which comprises gaseous sulfur and hydrogen over a solid catalyst. The reactant mixture is converted at a pressure of from 0.5 to 10 bar absolute, a temperature of from 300 to 450° C. and a sulfur excess in a reactor (1). The sulfur excess corresponds to a ratio of excess sulfur to H2S prepared of from 0.2 to 3 kg of sulfur per kg of H2S prepared.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: November 16, 2010
    Assignee: BASF SE
    Inventors: Andreas Wölfert, Herald Jachow, Heinz Drieβ
  • Patent number: 7824638
    Abstract: This disclosure relates generally to processes for efficient incineration and conversion of the tail gas streams from sulfur recovery units containing sulfur compounds such as H2S, CO2, COS, CS2, and other sulfur species and sulfur vapors from S1 to S8 to SO2. The present disclosure describes the use of a combination of catalysts to achieve efficient oxidation of all reduced sulfur compounds as well as oxidation of CO and H2 to meet the industry emission requirements. The catalytic tail gas incineration process described herein can advantageously operate at lower temperatures, which in turn can represent a savings in reduced fuel gas costs.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: November 2, 2010
    Assignee: Worleyparsons Group, Inc.
    Inventors: Mahin Rameshni, Stephen Santo
  • Publication number: 20100196245
    Abstract: A process for substantially removing carbonaceous material from a composition comprising providing the composition having carbonaceous material, reacting the carbonaceous material with a sulfur compound, and forming products having carbon and sulfur, and the resulting composition and system used therefore.
    Type: Application
    Filed: April 5, 2010
    Publication date: August 5, 2010
    Inventors: Raymond C. Stenger, James A. Wasas
  • Publication number: 20100159135
    Abstract: The present disclosure relates to novel methods and apparatuses for generating hydrogen sulfide or hydrogen selenide gas from decomposition of a solid precursor. In some embodiments, the generated gas is cooled so as to condense a by-product of the decomposition and thereby increasing the purity of the gas. In some embodiments, the generated hydrogen sulfide or hydrogen selenide gas is used to prepare metal sulfide or metal selenide films.
    Type: Application
    Filed: December 18, 2009
    Publication date: June 24, 2010
    Applicant: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Stacey Bent, Jeffrey S. King, Jonathan R. Bakke
  • Patent number: 7736618
    Abstract: The invention relates to a reaction vessel in which hydrogen sulphide is produced from sulphur and hydrogen, wherein the reaction vessel is partially or completely made up of a material which is resistant to the reaction mixture and its compounds and/or elements and which remains resistant even at high temperatures.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: June 15, 2010
    Assignee: Evonik Degussa GmbH
    Inventors: Hubert Redlingshoefer, Karl-Guenther Schuetze, Christoph Weckbecker, Klaus Huthmacher
  • Publication number: 20100137595
    Abstract: Use vaginal odorant compounds for controlling motile cell chemotaxis.
    Type: Application
    Filed: June 27, 2008
    Publication date: June 3, 2010
    Applicant: Fraunhofer-Gesellshcaft zur Forderung der angewandten Forschung e.V.
    Inventor: Andrea Büttner
  • Publication number: 20100015036
    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: Application
    Filed: January 10, 2008
    Publication date: January 21, 2010
    Applicant: BASF SE
    Inventors: Andreas Wölfert, Herald Jachow, Heinz Driess
  • Patent number: 7625539
    Abstract: A process for producing a purified gas stream from a feed gas stream comprising contaminants, the process comprising the steps of: (a) removing contaminants from the feed gas stream to obtain the purified gas stream and a sour gas stream comprising H2S and RSH; (b) separating the sour gas stream comprising H2S and RSH into a gas stream enriched in H2S and a residual gas stream comprising RSH; (c) converting H2S in the gas stream enriched in H2S to elemental sulphur in a Claus unit, thereby obtaining a first off-gas stream comprising SO2; (d) converting SO2 in the first off-gas stream comprising SO2 to H2S in a Claus off-gas treating reactor to obtain a second off-gas stream comprising H2S; (e) converting RSH from the residual gas stream comprising RSH to H2S in an RSH conversion reactor to obtain a residual gas stream comprising H2S, wherein at least one of the operating conditions of the RSH conversion reactor is different from the corresponding operating condition of the Claus off-gas treating reactor.
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: December 1, 2009
    Assignee: Shell Oil Company
    Inventors: Cornelis Petrus Johannes Maria Van Den Brand, Lydia Singoredjo, Johannes Theodorus Maria Smits
  • Patent number: 7560409
    Abstract: Photo-oxidation catalysts and methods for cleaning a metal-based catalyst are disclosed. An exemplary catalyst system implementing a photo-oxidation catalyst may comprise a metal-based catalyst, and a photo-oxidation catalyst for cleaning the metal-based catalyst in the presence of light. The exposure to light enables the photo-oxidation catalyst to substantially oxidize absorbed contaminants and reduce accumulation of the contaminants on the metal-based catalyst. Applications are also disclosed.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: July 14, 2009
    Assignee: Alliance for Sustainable Energy, LLC
    Inventors: J. Roland Pitts, Ping Liu, R. Davis Smith
  • Publication number: 20090175774
    Abstract: The detecting and monitoring of solid structure or phase transformation, such as those used for testing the formation of gas hydrates and their inhibition by chemical additives may be conducted in a multi-test assembly of laboratory bench scale loops. The test loop contains a fluid that includes water and hydrate-forming guest molecules such as methane, ethane, carbon dioxide and the like at hydrate-forming conditions of low temperature and high pressure. A small bit or “pig” may be circulated through the test loop at variable speeds. The pig may be moved or impelled through the test loop remotely. The formation of hydrates may be monitored with consistent and reproducible results.
    Type: Application
    Filed: January 3, 2008
    Publication date: July 9, 2009
    Applicant: BAKER HUGHES INCORPORATED
    Inventor: Jun TIAN
  • Publication number: 20090053130
    Abstract: The invention relates to a reaction vessel in which hydrogen sulphide is produced from sulphur and hydrogen, wherein the reaction vessel is partially or completely made up of a material which is resistant to the reaction mixture and its compounds and/or elements and which remains resistant even at high temperatures.
    Type: Application
    Filed: April 2, 2007
    Publication date: February 26, 2009
    Applicant: EVONIK DEGUSSA GMBH
    Inventors: Hubert Redlingshoefer, Karl-Guenther Schuetze, Christoph Weckbecker, Klaus Huthmacher
  • Patent number: 7485281
    Abstract: The reduction of gas streams containing sulfur dioxide to elemental sulfur is carried out by contacting a reducing gas, such as natural gas, methanol or a mixture of hydrogen and carbon monoxide, with recycled sulfur 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 13, 2006
    Date of Patent: February 3, 2009
    Assignee: Worleyparsons Group, Inc.
    Inventor: Mahin Rameshni
  • Publication number: 20080187485
    Abstract: The invention provides a method of extracting the hydrogen sulfide contained in a gas comprising aromatic hydrocarbons, wherein the following stages are carried out: a) contacting said gas with an absorbent solution so as to obtain a gas depleted in hydrogen sulfide and an absorbent solution laden with hydrogen sulfide, b) heating and expanding the hydrogen sulfide-laden absorbent solution to a predetermined temperature and pressure so as to release a gaseous fraction comprising aromatic hydrocarbons and to obtain an absorbent solution depleted in aromatic hydrocarbons, said temperature and pressure being so selected that said gaseous fraction comprises at least 50% of the aromatic hydrocarbons and at most 35% hydrogen sulfide contained in said hydrogen sulfide-laden absorbent solution, c) thermally regenerating the absorbent solution depleted in aromatic hydrocarbon compounds so as to release a hydrogen sulfide-rich gaseous effluent and to obtain a regenerated absorbent solution.
    Type: Application
    Filed: February 6, 2007
    Publication date: August 7, 2008
    Inventors: Julia Magne-Drisch, Anne-Claire Lucquin, Christina Streicher, Jean Elgue, Jean-Paul Cousin, Gauthier Perdu, Damien Roquet, Viep Hoang Dinh
  • Publication number: 20080019899
    Abstract: Hydrogen sulfide is selectively enriched from an acid gas (1) that comprises relatively large quantities of carbon dioxide using a configuration in which a portion of an isolated hydrogen sulfide stream is introduced into an absorber (51) operating as a carbon dioxide rejecter. The resulting concentrated hydrogen sulfide enriched solvent (4) is then further used (directly or indirectly) to absorb hydrogen sulfide from an acid feed gas.
    Type: Application
    Filed: August 18, 2004
    Publication date: January 24, 2008
    Inventors: John Mak, Richard B. Nielsen, Thomas King Chow, Oliver Margan, Vincent Wai Wong
  • Patent number: 7014833
    Abstract: A process for reacting a first component with itself or a second component to produce a third component in which a first material comprising a first component or said first component and a second component is fed to divided wall column having a catalytic distillation structure in at least one of the separate vertical sections of the divided wall column where concurrently: (1) a first component alone or with a second component is contacted with a catalytic distillation structure in a distillation reaction zone thereby catalytically reacting at least a portion of the first component with itself or with the second component to form a product and (2) a first mixture comprising the first component and the product or the first component, the second component and the product; and withdrawing the product from the distillation column reactor; while within the column concurrently with the catalytic reaction and fractionation a second mixture is fractionated, which contains the first component and the product or first a
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: March 21, 2006
    Assignee: Catalytic Distillation Technologies
    Inventors: Willibrord A. Groten, Mario J. Maraschino
  • Patent number: 6852305
    Abstract: A process is provided for the production of hydrogen sulphide from the bacterial reduction of a mixture of a liquid and elemental sulfur with an electron donor, such as hydrogen gas, carbon monoxide or organic compounds. The bacteria may be Desulforomonas sp. (mesophilic), Desulfotomaculum KT7 (thermophilic), etc. The liquid/sulfur mixture is at a pH ranging from 5 to 9, and the liquid/sulfur mixture contacts the bacteria at a hydraulic retention time of at least 1 day. The hydrogen sulphide is stripped from the liquid medium to produce a gas containing at least 1 volume percent hydrogen sulphide.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: February 8, 2005
    Assignee: Paques Bio Systems B.V.
    Inventors: Cees Jan Nico Buisman, Henk Dijkman
  • Patent number: 6676918
    Abstract: A method for removing hydrogen sulfide from liquid sulfur, comprising introducing liquid sulfur containing hydrogen sulfide in an upstream portion of a conduit. The conduit has a fluid outlet in a downstream portion thereof located within a lower portion of a first vessel. The method further includes causing the liquid sulfur to flow through the conduit outlet into the first vessel, up an annulus formed between the conduit and the first vessel and overflow through an outlet positioned at an upper portion of the first vessel into a second vessel which is connected to a liquid sulfur pit operating at atmospheric pressure. Air is introduced into the liquid sulfur located in the annulus at a point between the conduit outlet and said first vessel outlet. The flows concurrently to the direction of flow of the liquid sulfur in the annulus and out of the first vessel outlet into the second vessel thereby removing hydrogen sulfide from the liquid sulfur in the annulus.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: January 13, 2004
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Francis Sui Lun Wu, Michael Allen Capone, Raymond Paul Shapka, David Ian Devenny
  • Publication number: 20020068034
    Abstract: The present invention provides a method for inhibiting the evolution of H2S from sulfhydryl compounds in molten sulfur by using scavenging agents such as anhydrides and polymers thereof, conjugated ketones, carbonates, epoxides, monoesters and diesters of unsaturated dicarboxylic acids and polymers of these esters, and the like and mixtures thereof. In one embodiment, it is preferred that the scavenging agent is in liquid form at contact temperature with the molten sulfur. In another embodiment, the scavenging agent may be atomized into the vapor space over the molten sulfur to contact the sulfur with the agent.
    Type: Application
    Filed: October 9, 2001
    Publication date: June 6, 2002
    Inventors: John A. Schield, Weldon J. Cappel, Jerry J. Weers, Glenn L. Roof
  • Patent number: 6372156
    Abstract: In one aspect, the invention encompasses a method of chemically converting a first material to a second material. A first plasma and a second plasma are formed, and the first plasma is in fluid communication with the second plasma. The second plasma comprises activated hydrogen and oxygen, and is formed from a water vapor. A first material is flowed into the first plasma to at least partially ionize at least a portion of the first material. The at least partially ionized first material is flowed into the second plasma to react at least some components of the first material with at least one of the activated hydrogen and activated oxygen. Such converts at least some of the first material to a second material. In another aspect, the invention encompasses a method of forming a synthetic gas by flowing a hydrocarbon-containing material into a hybrid-plasma system.
    Type: Grant
    Filed: August 19, 1999
    Date of Patent: April 16, 2002
    Assignee: Bechtel BWXT Idaho, LLC
    Inventors: Peter C. Kong, Jon D. Grandy
  • Patent number: 6342651
    Abstract: A process is provided for the combustion of ammonium salts of sulfuric acid contained in aqueous media. More particularly, a reductive combustion process which produces a combustion gas containing a divalent sulfur compound having a high concentration of hydrogen sulfide. The process is suitable for combusting ammonium salts of sulfuric acid produced during manufacture of 2-hydroxy-4-methylthiobutanoic acid (HMBA) or methionine. The divalent sulfur compounds in the combustion gas may be further converted to other useful sulfur products and recycled for use in the manufacture of HMBA or methionine.
    Type: Grant
    Filed: August 4, 2000
    Date of Patent: January 29, 2002
    Assignee: Novus International, Inc.
    Inventors: Stephen J. Lorbert, James M. Willock, Lewis B. Irvine, Shubhender Kapila, Virgil J. Flanigan, Paul K. S. Nam, Yvonne M. Liske
  • Patent number: 6315802
    Abstract: Hydrogen sulfide is produced by charging a sulfur containing feed to a molten metal bath containing over 3 wt. % dissolved carbon. Allowing dissolved carbon levels to build up in the bath, preferably by controlling oxygen addition to ensure a large inventory of dissolved carbon, creates a reducing “atmosphere” in the molten metal bath which allows most of the feed sulfur to be converted to H2S, which can be converted to elemental sulfur using a Claus unit or similar technology. Oxygen addition, to burn carbon from the bath, preferably occurs at a different time or place in the bath than the time or place of sulfur containing feed addition.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: November 13, 2001
    Assignee: Marathon Ashland Petroleum LLC
    Inventor: Donald P. Malone
  • Patent number: 6284214
    Abstract: A process for recovering and purifying vanadium found in petroleum coke is disclosed. Coke containing V and sulfur is charged to a molten metal bath and dissolved to form a molten metal bath with dissolved carbon, dissolved V metal and dissolved sulfur. At least a majority of the dissolved sulfur is released as H2S by maintaining reducing conditions in the bed, by maintaining a high concentration of dissolved carbon or addition of steam or hydrogen rich hydrocarbon such as methane or some combination of these approaches.
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: September 4, 2001
    Assignees: Marathon Ashland Petroleum LLC, Envires LLC
    Inventors: Thomas C. Holcombe, Donald P. Malone
  • Patent number: 5976868
    Abstract: An installation and a method are described for the treatment of a gas containing hydrogen sulphide, the gas (1) being washed in a first gas scrubber (5) with an alkaline wash liquid and the spent wash liquid (4) being treated in an aerobic reactor (6) with oxygen in the presence of sulphide-oxidising bacteria and the effluent (9) from the aerobic reactor (6) being re-used as wash liquid (3) and the elementary sulphur formed during the treatment with oxygen being removed from the effluent (19), the effluent (13) from which sulphur has been removed being treated in an anaerobic reactor (17) with sulphate-reducing bacteria and returned to the aerobic reactor (6). The installation and the method can also be used for simultaneous removal of SO.sub.2, COS, CS.sub.2, NH.sub.3 and HCN.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: November 2, 1999
    Assignee: Paques Bio Systems B.V.
    Inventor: Cees Jan Nico Buisman
  • Patent number: 5744117
    Abstract: A method and an apparatus produce a product in at least one phase from an organic component in a feed gas stream. The method includes forming a process zone including a process molten bath and a process gas space disposed over the process molten bath. Molten droplets of said molten bath are then dispersed across the process gas space. The feed gas stream is then directed into the process gas zone, wherein the organic component is exposed to said molten droplets, thereby converting at least a portion of the organic component to a product in at least one phase.The apparatus of the invention comprises a reactor which includes a gas formation section, having a feed inlet, and means for retaining a solid feed component within the gas formation section. The apparatus also includes a process section, disposed in the reactor, having a process gas space, a gas outlet and a process molten bath disposed therein.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: April 28, 1998
    Assignee: Molten Metal Technology, Inc.
    Inventors: Mark A. Wilkinson, Christopher J. Nagel
  • Patent number: 5686056
    Abstract: The invention provides methods for purifying hydrogen sulfide gas having impurities therein. In one exemplary method, the hydrogen sulfide gas is purified by passing the gas through a filter media, with at least some of the impurities being trapped within the filter media. A catalyst may also be provided to break down some of the impurities to hydrogen sulfide and sulfur, so that the sulfur may be trapped and collected within the filter media.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: November 11, 1997
    Assignee: Bechtel Group, Inc.
    Inventor: Charles L. Kimtantas
  • Patent number: 5635147
    Abstract: In addition to ash and coke, the gasification residue contains alkaline earth metal sulfide and alkaline earth metal oxide because desulfuring agents have been supplied to the gasifier. At temperatures from 5.degree. to 80.degree. C. the gasification residue is mixed with an acid-containing aqueous solution so that a gas which is rich in H.sub.2 S is produced. Ash, coke, and alkaline earth metal salt are supplied to a flotation zone, in which coke is separated. A solid residue which contains ash and alkaline earth metal salt is withdrawn from the flotation zone. Carbonic acid or dilute sulfuric acid is preferably used as an acid.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: June 3, 1997
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Peter Herbert, Rainer Reimert, Michael Stroder