Disulfide Patents (Class 423/443)
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Patent number: 11370750Abstract: The following invention regards a process of demethylating a methyl ester of methionine or its hydroxy analog and producing methane thiol as a side-product. The methionine and its hydroxy analog are suitable as an animal feed additive and as a food additive. The methane thiol may be consumed in a hydrothiolation step such as in a step of preparing the methyl ester of methionine or its hydroxy analog from methyl vinyl glycolate.Type: GrantFiled: May 13, 2019Date of Patent: June 28, 2022Assignee: HALDOR TOPSØE A/SInventors: Amanda Birgitte Sølvhøj, Esben Taarning
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Patent number: 10759722Abstract: Aspects of the invention are associated with the discovery of approaches for the conversion of sour natural gas streams, by conversion to liquid hydrocarbons. Particular processes and their associated apparatuses advantageously combine (i) dehydroaromatization (DHA) of methane in a gaseous feedstock, to produce aromatic hydrocarbons such as benzene, with (ii) the reaction of H2S and methane in this feedstock, to produce organic sulfur compounds such as carbon disulfide (CS2) and thiophene (C4H4S). A gaseous product having a reduced concentration of H2S is thereby generated. The aromatic hydrocarbons and organic sulfur compounds may be recovered in a liquid product. Both the gaseous and liquid products may be easily amenable to further upgrading. Other advantages of the disclosed processes and apparatuses reside in their simplicity, whereby the associated streams, including a potential gaseous recycle, generally avoid high partial pressures of H2S.Type: GrantFiled: January 11, 2018Date of Patent: September 1, 2020Assignee: Gas Technology InstituteInventors: Terry Marker, Jim Wangerow, Dane Boysen, Martin B. Linck, Pedro Ortiz-Toral
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Patent number: 10689334Abstract: The present invention relates to a method for preparing methyl mercaptan, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (H2S) and optionally sulphur (S) such as to form carbon disulphide (CS2) and hydrogen (H2); b) reacting said carbon disulphide (CS2) by hydrogenation in the presence of said hydrogen (H2) obtained in step a) such as to form methyl mercaptan (CH3SH), hydrogen sulphide (H2S) and possibly hydrogen (H2); c) optionally recirculating said hydrogen sulphide (H2S) formed during step b) to step a); and d) recovering the methyl mercaptan.Type: GrantFiled: June 29, 2015Date of Patent: June 23, 2020Assignee: Arkema FranceInventors: Georges Fremy, Patrice Barre, Jean-Michel Raymond
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Patent number: 10550077Abstract: The present invention relates to a method for preparing dimethyl disulphide, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (H2S) and optionally sulphur (S) such as to form carbon disulphide (CS2) and hydrogen (H2); b) reacting said carbon disulphide (CS2) by hydrogenation in the presence of said hydrogen (H2) obtained in step a), such as to form methyl mercaptan (CH3SH), hydrogen sulphide (H2S) and optionally hydrogen (H2); c) optionally, but preferably, recirculating said hydrogen sulphide (H2S) formed in step b) to step a); d) reacting the methyl mercaptan formed in step b) with sulphur such as to form dimethyl disulphide and hydrogen sulphide; e) optionally recirculating the hydrogen sulphide formed during step d) to step a); and f) recovering the dimethyl disulphide.Type: GrantFiled: June 29, 2015Date of Patent: February 4, 2020Assignee: Arkema FranceInventors: Georges Fremy, Patrice Barre, Jean-Michel Raymond
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Patent number: 8778230Abstract: A subject-matter of the invention is a novel process for the preparation of sulphur-modified monolithic porous carbon-based materials by impregnation with a strong sulphur-based acid, the materials capable of being obtained according to this process and the use of these materials with improved supercapacitance properties to produce electrodes intended for energy storage systems. Electrodes composed of sulphur-modified monolithic porous carbon-based materials according to the invention and lithium batteries and supercapacitors having such electrodes also form part of the invention.Type: GrantFiled: November 11, 2011Date of Patent: July 15, 2014Assignee: HitchinsonInventors: David Ayme-Perrot, Marie Dieudonné, Philippe Sonntag, Anne-Caroline Pasquier
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Patent number: 8722006Abstract: The invention provides a process for the manufacture of carbon disulphide comprising supplying a molecular oxygen-containing gas and a feedstock comprising a hydrocarbonaceous compound to a reaction zone containing a liquid elemental sulphur phase and reacting, in the liquid sulphur phase, at a temperature in the range of from 300 to 750° C., the hydrocarbonaceous compound with elemental sulphur to form carbon disulphide and hydrogen sulphide and oxidizing at least part of the hydrogen sulphide formed to elemental sulphur and water. The invention further provides the use of a liquid stream comprising carbon disulphide, hydrogen sulphide and carbonyl sulphide obtainable such process for enhanced oil recovery.Type: GrantFiled: May 14, 2007Date of Patent: May 13, 2014Assignee: Shell Oil CompanyInventors: Carolus Matthias Anna Maria Mesters, Ronald Jan Schoonebeek
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Publication number: 20140120013Abstract: One aspect of the present invention relates to salts that are room-temperature ionic liquids (RTILs), methods of making them, and methods of using them in connection with temporary or permanent gas sequestration. Another aspect of the present invention relates to a class of solvents which can be transformed into RTILs by exposure to a gas, and methods of using them in connection with temporary or permanent gas sequestration.Type: ApplicationFiled: November 5, 2013Publication date: May 1, 2014Applicant: Georgetown UniversityInventors: Tao Yu, Richard G. Weiss, Taisuke Yamada, Mathew George
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Publication number: 20140113811Abstract: Provided are methods for storing gases on porous adsorbents, methods for optimizing the storage of gases on porous adsorbents, methods of making porous adsorbents, and methods of gas storage of optimized compositions, as in systems containing porous adsorbents and gas adsorbed on the surface of the porous adsorbent. The disclosed methods and systems feature a constant or increasing isosteric enthalpy of adsorption as a function of uptake of the gas onto the exposed surface of a porous adsorbent. Adsorbents with a porous geometry and surface dimensions suited to a particular adsorbate are exposed to the gas at elevated pressures in the specific regime where n/V (density) is larger than predicted by the ideal gas law by more than several percent.Type: ApplicationFiled: October 10, 2013Publication date: April 24, 2014Inventors: Nicholas P. STADIE, Brent T. FULTZ, Channing AHN, Maxwell MURIALDO
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Patent number: 8551435Abstract: This invention provides novel processes utilizing compositions comprising substituted polyamines as acid gas scrubbing solutions and methods of using the compositions in an industrial system. The invention relates to the use of such polyamine compounds in industrial processes to remove acidic contaminants from natural and industrial fluid streams, such as natural gas, combustion gas, natural gas, synthesis gas, biogas, and other industrial fluid streams. The compositions and methods of the invention are useful for removal, absorption, or sequestration of acidic contaminants and sulfide contaminants including CO2, H2S, RSH, CS2, COS, and SO2.Type: GrantFiled: February 15, 2012Date of Patent: October 8, 2013Assignee: Nalco CompanyInventors: Alan M. Blair, Keith N. Garside, William J. Andrews, Kailas B. Sawant
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Publication number: 20130217938Abstract: Processes for forming carbon disulfide from a gas stream containing hydrogen sulfide. A gaseous stream comprising lower molecular weight alkanes and hydrogen sulfide may be contacted with sufficient bromine at a temperature of from about 250° C. to about 530° C. to convert substantially all of said hydrogen sulfide to carbon disulfide. The gaseous stream may contain from about 0.001 to about 20 mol % hydrogen sulfide. The molar ratio of bromine to hydrogen sulfide may be about 2:1.Type: ApplicationFiled: February 6, 2013Publication date: August 22, 2013Applicant: MARATHON GTF TECHNOLOGY, LTD.Inventor: Marathon GTF Technology, Ltd.
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Publication number: 20120289439Abstract: A process for the manufacture of carbon disulphide comprising the following steps reacting carbon dioxide with hydrogen sulphide to form carbonyl sulphide and water; and absorbing at least a portion of the water with a sorbent, leaving a mixture comprising carbonyl sulphide, carbon dioxide, and hydrogen sulphide.Type: ApplicationFiled: January 5, 2011Publication date: November 15, 2012Inventors: Carolus Matthias Anna Maria Mesters, Joseph Broun Powell, Ronald Jan Schoonebeek, Dean Chien Wang
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Patent number: 8097230Abstract: The invention provides a process for the manufacture of carbon disulphide by reacting carbon monoxide with elemental sulphur to form carbonyl sulphide and disproportionating the carbonyl sulphide formed into carbon disulphide and carbon dioxide, the process comprising contacting a gaseous stream comprising carbon monoxide with a liquid elemental sulphur phase containing a solid catalyst at a temperature in the range of from 250 to 700° C. to obtain a gaseous phase comprising carbonyl sulphide, carbon disulphide and carbon dioxide. The invention further provides the use of a liquid stream comprising carbon disulphide, carbonyl sulphide and carbon dioxide obtainable by such process for enhanced oil recovery.Type: GrantFiled: July 5, 2007Date of Patent: January 17, 2012Assignee: Shell Oil CompanyInventors: Carolus Matthias Anna Maria Mesters, Ronald Jan Schoonebeek
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Publication number: 20110076214Abstract: One aspect of the present invention relates to salts that are room-temperature ionic liquids (RTILs), methods of making them, and methods of using them in connection with temporary or permanent gas sequestration. Another aspect of the present invention relates to a class of solvents which can be transformed into RTILs by exposure to a gas, and methods of using them in connection with temporary or permanent gas sequestration.Type: ApplicationFiled: January 28, 2008Publication date: March 31, 2011Applicant: Georgetown University Office of Technology commercializationInventors: Tao Yu, Richard G. Weiss, Taisuke Yamada, Mathew George
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Publication number: 20100196245Abstract: 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: ApplicationFiled: April 5, 2010Publication date: August 5, 2010Inventors: Raymond C. Stenger, James A. Wasas
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Patent number: 7763227Abstract: A process for the manufacture of carbon disulfide comprising the following steps: (a) reacting carbon monoxide with hydrogen sulfide to form carbonyl sulfide and hydrogen; (b) contacting the carbonyl sulfide formed in step (a) with a catalyst effective for disproportionating carbonyl sulfide into carbon disulfide and carbon dioxide.Type: GrantFiled: September 17, 2007Date of Patent: July 27, 2010Assignee: Shell Oil CompanyInventor: Dean Chien Wang
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Publication number: 20100028243Abstract: A process for the manufacture of carbon disulphide comprising the following steps: (a) reacting carbon monoxide with hydrogen sulphide to form carbonyl sulphide and hydrogen; (b) contacting the carbonyl sulphide formed in step (a) with a catalyst effective for disproportionating carbonyl sulphide into carbon disulphide and carbon dioxide.Type: ApplicationFiled: September 17, 2007Publication date: February 4, 2010Inventor: Dean Chien Wang
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Publication number: 20090312202Abstract: The invention provides a process for the manufacture of carbon disulphide by reacting carbon monoxide with elemental sulphur to form carbonyl sulphide and disproportionating the carbonyl sulphide formed into carbon disulphide and carbon dioxide, the process comprising contacting a gaseous stream comprising carbon monoxide with a liquid elemental sulphur phase containing a solid catalyst at a temperature in the range of from 250 to 700° C. to obtain a gaseous phase comprising carbonyl sulphide, carbon disulphide and carbon dioxide. The invention further provides the use of a liquid stream comprising carbon disulphide, carbonyl sulphide and carbon dioxide obtainable by such process for enhanced oil recovery.Type: ApplicationFiled: July 5, 2007Publication date: December 17, 2009Inventors: Carolus Matthias Anna Maria Mesters, Ronald Jan Schoonebeek
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Patent number: 7601320Abstract: A system including a mechanism for recovering oil and/or gas from an underground formation, the oil and/or gas comprising one or more sulfur compounds; a mechanism for converting at least a portion of the sulfur compounds from the recovered oil and/or gas into a carbon disulfide formulation; and a mechanism for releasing at least a portion of the carbon disulfide formulation into a formation.Type: GrantFiled: April 19, 2006Date of Patent: October 13, 2009Assignee: Shell Oil CompanyInventors: Johan Jacobus Van Dorp, Michael Zvi Golombok, Michiel Jan Groeneveld, Douglas Charlton McCammon, Thomas Mikus, Alexander Michiel Mollinger, Brendan Dermot Murray, Eric Johannes Puik, Raul Valdez, Willem Van Vark, Dean Chien Wang
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Publication number: 20090226358Abstract: The invention provides a process for the manufacture of carbon disulphide comprising supplying a molecular oxygen-containing gas and a feedstock comprising a hydrocarbonaceous compound to a reaction zone containing a liquid elemental sulphur phase and reacting, in the liquid sulphur phase, at a temperature in the range of from 300 to 750° C., the hydrocarbonaceous compound with elemental sulphur to form carbon disulphide and hydrogen sulphide and oxidising at least part of the hydrogen sulphide formed to elemental sulphur and water. The invention further provides the use of a liquid stream comprising carbon disulphide, hydrogen sulphide and carbonyl sulphide obtainable such process for enhanced oil recovery.Type: ApplicationFiled: May 14, 2007Publication date: September 10, 2009Applicant: SHELL OIL COMPANYInventors: Carolus Matthias Anna Maria Mesters, Ronald Jan Schoonebeek
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Publication number: 20090155159Abstract: The invention provides a process for the manufacture of carbon disulphide comprising supplying a feedstock comprising a hydrocarbonaceous compound to a reaction zone containing a liquid elemental sulphur phase and reacting, in the liquid sulphur phase, at a temperature in the range of from 350 to 750° C. and a pressure in the range of from 3 to 200 bar (absolute) and in the absence of a catalyst, the hydrocarbonaceous compound with elemental sulphur in the absence of molecular oxygen. The invention further provides the use of a liquid stream comprising carbon disulphide and hydrogen sulphide obtainable by such process for enhanced oil recovery.Type: ApplicationFiled: May 14, 2007Publication date: June 18, 2009Inventors: Carolus Matthias Anna Maria Mesters, Ronald Jan Schoonebeek
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Publication number: 20090136411Abstract: Carbon nanotube, method for positioning the same, field effect transistor made using the carbon nanotube, method for making the field-effect transistor, and a semiconductor device are provided. The carbon nanotube includes a bare carbon nanotube and a functional group introduced to at least one end of the bare carbon nanotube.Type: ApplicationFiled: November 13, 2008Publication date: May 28, 2009Applicant: Sony CorporationInventor: Houjin Huang
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Publication number: 20090025935Abstract: A system including a mechanism for recovering oil and/or gas from an underground formation, the oil and/or gas comprising one or more sulfur compounds; a mechanism for converting at least a portion of the sulfur compounds from the recovered oil and/or gas into a carbon disulfide formulation; and a mechanism for releasing at least a portion of the carbon disulfide formulation into a formation.Type: ApplicationFiled: April 19, 2006Publication date: January 29, 2009Inventors: Johan Jacobus Van Dorp, Michael Zvi Golombok, Michiel Jan Groeneveld, Douglas Charlton McCammon, Thomas Mikus, Alexander Michiel Mollinger, Brendan Dermot Murray, Eric Johannes Puik, Raul Valdez, Willem Van Vark, Dean Chien Wang
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Patent number: 7426959Abstract: A system including a mechanism for recovering oil and/or gas from an underground formation, the oil and/or gas comprising one or more sulfur compounds; a mechanism for converting at least a portion of the sulfur compounds from the recovered oil and/or gas into a carbon disulfide formulation; and a mechanism for releasing at least a portion of the carbon disulfide formulation into a formation.Type: GrantFiled: April 19, 2006Date of Patent: September 23, 2008Assignee: Shell Oil CompanyInventors: Dean Chien Wang, Alexander Michiel Mollinger, Douglas Charlton McCammon, Raul Valdez, Johan Jacobus Van Dorp, Eric Johannes Puik, Michael Zvi Golombok, Willem Van Vark, Michiel Jan Groeneveld, Brendan Dermot Murray, Thomas Mikus
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Patent number: 7090818Abstract: The specification discloses a process for the manufacture of carbon disulfide from sulfur dioxide and carbon monoxide comprising two catalytic reactions. In the first reaction, sulfur dioxide and carbon monoxide are converted to carbonyl sulfide and carbon dioxide. In the second reaction, carbonyl sulfide is disproportionated to carbon disulfide and carbon dioxide. The second reaction is conducted in the presence of a solvent, which continuously removes the carbon disulfide product so as to drive the reaction to completion.Type: GrantFiled: January 24, 2003Date of Patent: August 15, 2006Inventor: John E. Stauffer
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Publication number: 20040146450Abstract: The specification discloses a process for the manufacture of carbon disulfide from sulfur dioxide and carbon monoxide comprising two catalytic reactions. In the first reaction, sulfur dioxide and carbon monoxide are converted to carbonyl sulfide and carbon dioxide. In the second reaction, carbonyl sulfide is disproportionated to carbon disulfide and carbon dioxide. The second reaction is conducted in the presence of a solvent, which continuously removes the carbon disulfide product so as to drive the reaction to completion.Type: ApplicationFiled: January 24, 2003Publication date: July 29, 2004Inventor: John E. Stauffer
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Patent number: 6342651Abstract: 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: GrantFiled: August 4, 2000Date of Patent: January 29, 2002Assignee: 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
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Patent number: 6303097Abstract: A process for the preparation of metal sulphides includes reacting corresponding metal oxides at temperatures between 500 and 1500° C. in a stream of gaseous CS2 characterized in that the CS2 is generated from elementary carbon and gaseous H2S by reaction at temperatures between 900 and 1500° C. upstream of the metal oxide. The process furnishes metal sulphides of high purity, thus being of specific usefulness in optical glass materials, for, e.g., fiber optics.Type: GrantFiled: February 2, 1995Date of Patent: October 16, 2001Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Barry Edward Kinsman, Richard Hanney
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Patent number: 5753386Abstract: There is provided a hydrogen-absorbing alloy for battery comprising a rapidly-quenched alloy having the composition represented by a general formula ANi.sub.a M.sub.b M'.sub.c T.sub.d (where, A is composed of La, Ce, Pr, Nd and Y, an amount of La content in A is 50-99 wt %, an amount of Ce content is 1-30 wt %, an amount of Pr content is 0-10 wt %, an amount of Nd content is 0-10 wt % and an amount of Y content is 0-10 wt %; M is at least one element selected from Co, Fe and Cu; M' is at least one element selected from Mn and Al; T is at least one element selected from B, Si, S, Cr, Ga, Ge, Mo, Ru, Rh, Pd, Ag, In, Sn, Sb, Bi, P, V, Nb, Ta and W; and a, b, c and d are atomic ratios and satisfy 3.2.ltoreq.a.ltoreq.4.0, 0.4.ltoreq.b.ltoreq.1.0, 0.3.ltoreq.c.ltoreq.0.8, 0.ltoreq.d.ltoreq.0.2, 4.9.ltoreq.a+b+c+d.ltoreq.5.4), characterized in that a hydrogen equilibrium pressure when the number of hydrogen atoms absorbed by one atom of the alloy at a temperature of 60.degree. C. is 0.4 is 0.05-0.6 atm.Type: GrantFiled: September 26, 1996Date of Patent: May 19, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Takamichi Inaba, Takao Sawa, Shusuke Inada, Fumiyuki Kawashima, Noriaki Sato, Toshiya Sakamoto, Masami Okamura, Tomohisa Arai, Keisuke Hashimoto
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Patent number: 5478541Abstract: The present invention provides a method for separately removing mercaptans and hydrogen sulfide from a hydrocarbon gas stream by passing the gas through a bed which includes iron oxide which catalyzes the formation of disulfides and trisulfides from mercaptans and also reacts with at least part of the hydrogen sulfide to form acid-stable solids; causing the di- and trisulfides to exit the bed in the gas phase; and removing and recovering the di- and trisulfides by adsorption or condensation. Any remaining hydrogen sulfide may be scavenged from the gas stream by passage through a bed containing iron oxide similar to that used first above. If the gas stream contains substantial amounts of hydrocarbon aerosols, they should be filtered out in advance of the bed.Type: GrantFiled: May 12, 1995Date of Patent: December 26, 1995Inventors: Alvin Samuels, Irwin Fox
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Patent number: 5340585Abstract: Compositions and methods which are effective to treat benign gynecological disorders for extended periods of time in women in who the risk of endometrial stimulation is minimized or absent are described, wherein an effective amount of a gonadotropin hormone releasing hormone composition and an effective amount of an estrogenic composition are provided over a period of time, optionally with addition of an androgenic composition.Type: GrantFiled: May 17, 1993Date of Patent: August 23, 1994Assignee: University of Southern CaliforniaInventors: Malcolm C. Pike, Darcy V. Spicer
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Patent number: 4816547Abstract: The present invention provides a process for producing carbon dichalcogen polymers having a conductivity of about 10.sup.-8 S/cm without doping treatment which is increased to 10.sup.-4 to 10.sup.-2 S/cm by doping, by polymerizing carbon dichalcogenide monomers (carbon disulfide, carbon diselenide, etc.) in the form of a solution thereof under a low pressure in the presence of an anionic catalyst.Type: GrantFiled: February 2, 1988Date of Patent: March 28, 1989Assignee: Director General of the Agency of Industrial Science and TechnologyInventors: Jun Tsukamoto, Akio Takahashi, Kiichiro Matsumura
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Patent number: 4751068Abstract: This invention relates to a method for catalyzing the reactionsQZ+H.sub.2 X.fwdarw.QZX (1) psandQZX.fwdarw.QZ+H.sub.2 X (2)wherein Q=C or N;Z=O or S;X=O, S, NH or NR;R=C.sub.1 to C.sub.8 alkyl which may be linear, branched or cyclized,which comprises:contacting at least one polydentate nitrogen-containing chelating agent complexed with a metal atom with the reactants of one of said reactions, wherein said contacting takes place in the presence of a means for oxidizing when reaction (1) is catalyzed and in the presence of a means for reducing when reaction (2) is catalyzed.Type: GrantFiled: September 10, 1984Date of Patent: June 14, 1988Assignee: Duke UniversityInventors: David Bickar, Celia Bonaventura, Joseph Bonaventura
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Patent number: 4695443Abstract: There is disclosed a process for the production of carbon disulfide and hydrogen sulfide from a particulate carbon source. In one embodiment, an oxygen containing gas is reacted with a particulate carbon source in a one step process so as to provide the temperatures necessary for the reaction of the particulate carbon source with sulfur to produce carbon disulfide. In another embodiment, a source of hydrogen is introduced along with the oxygen containing gas and sulfur so as to produce hydrogen sulfide in a single step process.Type: GrantFiled: February 14, 1985Date of Patent: September 22, 1987Assignee: Stauffer Chemical CompanyInventor: Albert M. Leon
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Patent number: 4584118Abstract: Metal trithiocarbonates such as Na.sub.2 CS.sub.3 are useful depressant for such sulfided minerals as copper and iron sulfides in molybdenum recovery.Type: GrantFiled: January 14, 1985Date of Patent: April 22, 1986Assignee: Phillips Petroleum CompanyInventors: Robert M. Parlman, Tommy L. Young, Clarence R. Bresson
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Patent number: 4397829Abstract: Chlorine-containing organic compounds are reacted with a sulfur-containing stream to produce hydrogen chloride, carbon disulfide, and/or hydrogen sulfide. Hydrogen chloride and carbon disulfide are recovered as products. Hydrogen sulfide is recovered as a product or converted into elemental sulfur for recycle using chlorine or oxygen-containing gas.Type: GrantFiled: February 24, 1982Date of Patent: August 9, 1983Inventor: Wu-Chi Chen
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Patent number: 4383983Abstract: A method for the removal of carbon or carbon compounds from a waste stream generated in an unsupported slurry catalyst process utilized for the hydroconversion of heavy hydrocarbonaceous black oil which stream comprises vanadium sulfide, nickel sulfide and carbon or carbon compounds is disclosed. The carbon or carbon compound is removed by contacting the waste stream with sulfur dioxide at oxidizing conditions to yield a solid residue which contains metal sulfides.Type: GrantFiled: January 21, 1982Date of Patent: May 17, 1983Assignee: UOP Inc.Inventor: Peter Urban
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Patent number: 4146580Abstract: A hydrocarbon is partially oxidized in the presence of steam and oxygen in a high temperature reducing flame zone to which sulfur is added in excess of the quantity of hydrogen and carbon monoxide formed to generate a second flame zone. The gas stream is rapidly cooled to prevent further reactions, then further cooled to condense sulfur to the extent of providing unreacted hydrogen and carbon monoxide in a molar excess over the residual sulfur present in the gas stream. The resultant gas stream is passed to a catalytic conversion zone where residual sulfur and carbonyl sulfide are converted to hydrogen sulfide. A formed gas stream free of sulfur and sulfur dioxide may be cooled to below the dew point of water to remove water prior to use.Type: GrantFiled: June 20, 1977Date of Patent: March 27, 1979Assignee: The Ralph M. Parsons CompanyInventor: David K. Beavon
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Patent number: 4122156Abstract: A process for the recovery of carbon disulfide from a flue gas. A stream of sulfur dioxide is removed from a flue gas and introduced into a first reduction reactor containing a chromium promoted iron oxide catalyst where the sulfur dioxide is reduced to carbonyl sulfide. The carbonyl sulfide is introduced into a second reduction reactor which contains an active alumina catalyst. The carbonyl sulfide decomposes to carbon disulfide which is recovered.Type: GrantFiled: August 12, 1977Date of Patent: October 24, 1978Assignees: New England Power Company, Northeast Utilities Service CompanyInventors: James R. Kittrell, Charles W. Quinlan
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Patent number: 4094961Abstract: A reducing gas stream containing hydrogen, carbon monoxide and water, as steam, is passed through a molten sulfur to vaporize sulfur. The gas stream containing the vaporized sulfur is passed through a catalytic conversion zone where at a controlled temperature of from about 500.degree. to about 800.degree. F sulfur is converted to hydrogen sulfide. The introduced steam optionally coupled with a water quench following hydrogenation of sulfur serves to suppress carbonyl sulfide and carbon disulfide formation.Type: GrantFiled: November 7, 1974Date of Patent: June 13, 1978Assignee: Ralph M. Parsons CompanyInventor: David K. Beavon
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Patent number: 4073868Abstract: Continuous process for producing carbon bisulfide by reaction of sulfur and hydrocarbon. A hydrocarbon stream is introduced into a sulfur stream and the hot reaction mixture is moved vertically from the zone of introduction and/or the streams are fed countercurrent to impinge on each other.Type: GrantFiled: September 19, 1975Date of Patent: February 14, 1978Assignee: FMC CorporationInventors: Morton Meadow, Sidney Berkowitz
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Patent number: 4057613Abstract: Continuous process for producing carbon bisulfide by reaction of sulfur and hydrocarbon gas containing a multi-carbon hydrocarbon having at least three carbon atoms at a pressure in the range of 3.5 to 12 atmospheres. A stream of sulfur at a temperature of at least 650.degree. C and a stream of the hydrocarbon gas are fed into a reaction zone continuously. The temperatures and rates of flow of said vapor and gas are such that the calculated mixing temperature thereof is in the range of about 585 to 700.degree. C., and the flow conditions and mixing conditions of said gas and vapor streams are such that the hydrocarbon gas become substantially completely mixed with the sulfur vapor before the hydrocarbon comes into contact with a wall of the reaction zone.Type: GrantFiled: December 11, 1975Date of Patent: November 8, 1977Assignee: FMC CorporationInventors: Morton Meadow, Sidney Berkowitz
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Patent number: 4007254Abstract: Carbon oxysulfide is obtained in high yield and with high product selectivity and conversion rates by the sulfurization of methanol in the gas phase at elevated temperatures. The starting methanol utilized in the process may be advantageously supplied from natural gas generated at petroleum production sites.Type: GrantFiled: September 9, 1975Date of Patent: February 8, 1977Assignee: Rhone-Poulenc IndustriesInventors: Bernard Buathier, Andre Combes, Francois Pierrot, Henri Guerpillon
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Patent number: 3978198Abstract: A method for producing carbon disulfide by sulfurization of sulfur-containing organic compounds is described. Conventional apparatus may be employed with realization of reactant conversion rates approaching 100%, and production of undesirable by-products is insignificant.Type: GrantFiled: April 8, 1975Date of Patent: August 31, 1976Assignee: Rhone-Poulenc IndustriesInventors: Bernard Buathier, Andre Combes, Jean-Paul Jourdan
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Patent number: 3932595Abstract: Carbon disulfide is made by contacting hydrocarbons with sulfur vapor and sulfur dioxide at temperatures between 500.degree. - 1000.degree.C. for 0.3 - 10 seconds in the absence of a catalyst. The total sulfur introduced as sulfur vapor and sulfur dioxide is between 2.1 and 3.5 atoms per hydrocarbon carbon atom.Type: GrantFiled: June 7, 1974Date of Patent: January 13, 1976Assignee: Rhone-ProgilInventors: Jean Berthoux, Ghislain Schwachhofer