Utilizing Organic Reducing Agent Patents (Class 75/721)
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Patent number: 10943709Abstract: A 68Ge/68Ga generator for a continuous production of a 68Ga daughter nuclide, wherein the 68Ge parent nuclide thereof is specifically adsorbed to an inorganic support material and wherein said 68Ge parent nuclide continuously decays to 68Ga by electron capture at a half-life of 270.82 d, wherein the inorganic support material is at least one oxide of a metal being selected from the group consisting of: Vanadium, Niobium and Tantalum. The use of at least one oxide of a metal being selected from the group consisting of: Vanadium, Niobium and Tantalum as an inorganic support material for the manufacture of a 68Ge/68Ga generator for pharmaceutical purposes. With the inorganic support material of the present invention, it is possible to load 68Ge/68Ga generators with up to 8000 MBq of 68Ge (corresponding to 80 ?g Germanium).Type: GrantFiled: December 27, 2017Date of Patent: March 9, 2021Assignee: ITM Isotopen Technologien München AGInventors: Jussi Jernström, Konstantin Zhernosekov, Yury Totskiy, Mark Harfensteller, Marian Meckel
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Patent number: 8951330Abstract: The present invention provides a method for producing silver nanoparticles by employing ethanolamine. The method of this invention can be easily operated and no organic solvent is required. Ethanolamine first reacts with copolymers of poly(styrene-co-maleic anhydride) (abbreviated as SMA) to generate polymeric polymers. The polymeric polymers then reduce silver ions to silver atoms which are dispersed in the form of silver nanoparticles. Functional groups of the polymeric polymers can chelate with silver ions and be stably compatible with water or organic solvents, whereby the silver nanoparticles can be stably dispersed without aggregation and the produced silver nanoparticles.Type: GrantFiled: July 14, 2012Date of Patent: February 10, 2015Assignee: National Taiwan UniversityInventors: Jiang-Jen Lin, Wei-Cheng Tsai, Chao-Po Hsu, Wei-Li Lin, Yueh-Hsien Wu
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Publication number: 20140301921Abstract: Amine-aldehyde resins are disclosed for removing a wide variety of solids and/or ionic species from the liquids in which they are suspended and/or dissolved. These resins are especially useful as froth flotation depressants, for example in the beneficiation of value materials (e.g., bitumen, coal, or kaolin clay) to remove impurities such as sand. The resins are also useful for treating aqueous liquid suspensions to remove solid particulates, as well as for removing metallic ions in the purification of water.Type: ApplicationFiled: June 23, 2014Publication date: October 9, 2014Inventors: James T. Wright, John B. Hines, Lisa M. Arthur, Carl R. White, Kurt D. Gabrielson, Michael J. Cousin
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Patent number: 8628600Abstract: One embodiment of method for extracting hexavalent chromium includes preparing a liquid sample by adding a fatty acid to a polymer material, adding water or an aqueous alkali solution to this sample, and extracting hexavalent chromium contained in the sample in the water or the aqueous alkali solution.Type: GrantFiled: January 9, 2012Date of Patent: January 14, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Miho Muramatsu, Mitsuhiro Oki, Miyuki Takenaka
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Patent number: 8609898Abstract: The present invention provides a novel separation reagent capable of obtaining a high extraction % of rhodium in a chlorine-based acid solution, which has never existed heretofore, and a method for separating and recovering a platinum group metal using the same. An organic phase composed of an amide-containing tertiary amine separation reagent represented by the structural formula shown below is brought into contact with an acid solution containing a platinum group metal, thereby extracting rhodium, platinum and palladium with the organic phase.Type: GrantFiled: January 25, 2011Date of Patent: December 17, 2013Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Hirokazu Narita, Mikiya Tanaka, Kazuko Morisaku
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Publication number: 20130247718Abstract: Provided are methods method of recovering metal from an aqueous solution, the method comprising contacting an aqueous solution containing at least two metals selected from molybdenum, cobalt, nickel, zinc and iron with an organic solvent and an oxime-containing reagent composition at a predetermined pH, the predetermined pH selected to provide a high first metal extraction and a low second metal extraction; and separating the first metal from the solution.Type: ApplicationFiled: May 9, 2013Publication date: September 26, 2013Applicant: Cognis IP Management GmbHInventors: Michael Virnig, Jack Bender, Nathan C. Emmerich
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Patent number: 8500846Abstract: The present invention is to provide a novel rare metal extractant containing a cyclic phenol sulfide derivative of the formula (1) and a method for extractive separation of rare metal(s) using the rare metal extractant with high efficiency.Type: GrantFiled: February 10, 2009Date of Patent: August 6, 2013Assignee: Akita UniversityInventors: Yoshihiko Kondo, Chun-bin Li, Manabu Yamada, Fumio Hamada
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Patent number: 8475560Abstract: A method of producing silver nanofilaments that is relatively fast and may be carried out at normal room temperatures (e.g., from about 10° C. to about 25° C.). The method of producing silver nanofilaments includes the steps of adding a solid silver salt to liquid ether to form a mixture, adding a liquid fatty acid to the mixture, adding a reducing agent to the mixture, allowing the ingredients to react, and recovering silver nanofilaments.Type: GrantFiled: March 24, 2011Date of Patent: July 2, 2013Assignee: Kimberly-Clark Worldwide, Inc.Inventors: John P. Gann, Sophie Truc Lam
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Patent number: 8419822Abstract: Processes for producing carboxylic acid-stabilized silver nanoparticles are disclosed. A reaction mixture comprising a silver salt, a carboxylic acid, and a tertiary amine is heated to form carboxylic acid-stabilized silver nanoparticles.Type: GrantFiled: August 18, 2008Date of Patent: April 16, 2013Assignee: Xerox CorporationInventor: Yuning Li
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Patent number: 8328900Abstract: Provided herein are processes for recovering molybdenum and/or other value metals (e.g., uranium) present in aqueous solutions from a large range of concentrations: from ppm to grams per liter via a solvent extraction process by extracting the molybdenum and/or other value metal from the aqueous solution by contacting it with an organic phase solution containing a phosphinic acid, stripping the molybdenum and/or other value metal from the organic phase solution by contacting it with an aqueous phase strip solution containing an inorganic compound and having a ?1.0 M concentration of free ammonia, and recovering the molybdenum and/or other value metal by separating it from the aqueous phase strip solution. When the molybdenum and/or other value metal are present only in low concentration, the processes can include an organic phase recycle step and/or an aqueous phase strip recycle step in order to concentrate the metal prior to recover.Type: GrantFiled: July 6, 2010Date of Patent: December 11, 2012Assignee: Cytec Technology Corp.Inventors: Troy Allan Bednarski, Violina Antoneta Cocalia, Matthew Dean Soderstrom, Eduardo Alberto Kamenetzky, Andrew Michael Cameron, Douglas Harris
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Patent number: 8287771Abstract: Provided is a method for producing a silver particle powder excellent in the dispersibility in a liquid organic medium having a low polarity, which comprises reducing a silver compound in an alcohol having a boiling point of from 80° C. to 200° C. or in a polyol having a boiling point of from 150 to 300° C., at a temperature of from 80° C. to 200° C. under reflux while maintaining the stream having a Reynolds number of not more than 3.70×104. The stream having a Reynolds number of not more than 3.70×104 can be maintained by stirring with a stirring power of not more than 5.68×108 W. According to the method, a silver particle powder having good low-temperature sinterability and good dispersibility and suitable for use for microwiring formation can be obtained at a high yield.Type: GrantFiled: February 15, 2007Date of Patent: October 16, 2012Assignee: Dowa Electronics Materials Co., Ltd.Inventors: Kimitaka Sato, Yutaka Hisaeda
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Patent number: 8277538Abstract: Disclosed is a method of copper leaching without reducing the growth of iron-oxidizing bacterium and the iron-oxidizing capacity when leaching copper from a copper sulfide ore with the use of a sulfuric acid solution to which iron-oxidizing bacteria and silver have been added. Also disclosed is a method of leaching copper from a copper sulfide ore, including adding a naturally occurring nitrogen-containing organic component to a leaching solution upon copper leaching from a copper sulfide ore with the use of, as the leaching solution, a sulfuric acid solution to which iron-oxidizing bacteria and silver have been added is provided.Type: GrantFiled: November 25, 2009Date of Patent: October 2, 2012Assignee: JX Nippon Mining & Metals CorporationInventors: Takenari Kuwazawa, Akira Miura
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Publication number: 20120137830Abstract: One embodiment of method for extracting hexavalent chromium includes preparing a liquid sample by adding a fatty acid to a polymer material, adding water or an aqueous alkali solution to this sample, and extracting hexavalent chromium contained in the sample in the water or the aqueous alkali solution.Type: ApplicationFiled: January 9, 2012Publication date: June 7, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Miho Muramatsu, Mitsuhiro Oki, Miyuki Takenaka
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Patent number: 8167974Abstract: The process relates improving the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic acid, while utilizing pressure filtration.Type: GrantFiled: August 20, 2010Date of Patent: May 1, 2012Assignee: Grupo Petrotemex, S.A. De C.V.Inventor: Kenny Randolph Parker
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Publication number: 20120042752Abstract: The process relates improving the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic acid, while utilizing pressure filtration.Type: ApplicationFiled: August 20, 2010Publication date: February 23, 2012Applicant: EASTMAN CHEMICAL COMPANYInventor: Kenny Randolph Parker
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Patent number: 8070850Abstract: A system which uses available waste acid process streams from hydrometallurgical extraction processes as absorption media for the direct production of leach grade acid solutions for return to the hydrometallurgical processing circuit for use in liberating metals from metal-bearing materials. The produced acid may have a concentration in the range suitable for processing of metal-bearing materials.Type: GrantFiled: October 6, 2008Date of Patent: December 6, 2011Assignee: E H P Technology, LLCInventor: Eric H. Partelpoeg
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Patent number: 8029598Abstract: A method for recovering metal values from refractory sulfide ores is provided. The method includes the steps of separating clays and fines from crushed refractory sulfide ore, forming a heap from the refractory sulfide ore, producing a concentrate of refractory sulfide minerals from the separated fines and adding the concentrate to the heap, bioleaching the heap to thereby oxidize iron sulfides contained therein, and hydrometallurgically treating the bioleached ore to recover metal values contained therein.Type: GrantFiled: December 31, 2009Date of Patent: October 4, 2011Assignee: Geobiotics, LLCInventor: William J. Kohr
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Publication number: 20110113927Abstract: The present invention provides a novel separation reagent capable of obtaining a high extraction % of rhodium in a chlorine-based acid solution, which has never existed heretofore, and a method for separating and recovering a platinum group metal using the same. An organic phase composed of an amide-containing tertiary amine separation reagent represented by the structural formula shown below is brought into contact with an acid solution containing a platinum group metal, thereby extracting rhodium, platinum and palladium with the organic phase.Type: ApplicationFiled: January 25, 2011Publication date: May 19, 2011Applicant: National Institute of Advanced Industrial Science and TechnologyInventors: Hirokazu NARITA, Mikiya TANAKA, Kazuko MORISAKU
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Publication number: 20110083970Abstract: The present invention relates to an electrolytic process for producing metallic lead starting from desulfurized lead pastel comprising the following operative phases: a) leaching the desulfurized pastel by putting it in contact with a solution comprising ammonium chloride, with the formation of a leach liquor and evolution of gaseous CO2; b) separating a first solid residue and a first clarified leach liquor from the leach liquor coming from phase a); c) leaching the solid residue separated in phase b) by putting it in contact with a solution comprising ammonium chloride and hydrogen peroxide; d) separating a second solid residue and a second clarified leach liquor from the leach liquor coming from phase c); e) joining the first clarified leach liquor coming from phase b) with the second clarified leach liquor coming from phase d) and forming a single solution; f) subjecting the solution leaving phase e) to electrolysis in a flow cell, with a current density ranging from 50 to 10,000 A/m2, said electrolysis rType: ApplicationFiled: November 27, 2008Publication date: April 14, 2011Applicant: ENGITEC TECHNOLOGIES S.p.A.Inventors: Marco Olper, Carmelita Roncaldier, Carlo Olper, Luigi Olper, Alessandro Olper, Massimo Maccagni, Silvano Cossali
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Publication number: 20110020170Abstract: The invention relates to metal nanoparticles and a process for the preparation thereof, in which a metal salt solution is reduced with a reducing agent in the presence of the derivatized polyethyleneimines or polyvinylamines. Metal salt solutions of two or more different metals can be reduced simultaneously or in succession, metal nanoparticles comprising two or more different metals being obtained. Preferred metals are silver, palladium, and platinum. Suitable reducing agents are, for example, formic acid, formaldehyde, diethanolamine, 5-pentenoic acid and sodium borohydride. Silver can be used in the form of silver oxide and/or silver nitrate, palladium in the form of alkali metal tetrachloropalladate or palladium(II) nitrate and platinum in the form of alkali metal tetrachloroplatinate or tetraamineplatinum(II) nitrate.Type: ApplicationFiled: March 17, 2009Publication date: January 27, 2011Applicant: BASF SEInventors: Gerrit Luinstra, Wolfgang Schrof, Udo Gödert, Robert Feuerhake, Tobias Joachim Koplin, Imme Domke
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Publication number: 20110005354Abstract: Provided herein are processes for recovering molybdenum and/or other value metals (e.g., uranium) present in aqueous solutions from a large range of concentrations: from ppm to grams per liter via a solvent extraction process by extracting the molybdenum and/or other value metal from the aqueous solution by contacting it with an organic phase solution containing a phosphinic acid, stripping the molybdenum and/or other value metal from the organic phase solution by contacting it with an aqueous phase strip solution containing an inorganic compound and having a ?1.0 M concentration of free ammonia, and recovering the molybdenum and/or other value metal by separating it from the aqueous phase strip solution. When the molybdenum and/or other value metal are present only in low concentration, the processes can include an organic phase recycle step and/or an aqueous phase strip recycle step in order to concentrate the metal prior to recover.Type: ApplicationFiled: July 6, 2010Publication date: January 13, 2011Applicant: CYTEC TECHNOLOGY CORP.Inventors: Troy Allan Bednarski, Violina Antoneta Cocalia, Matthew Dean Soderstrom, Eduardo Alberto Kamenetzky, Andrew Michael Cameron, Douglas Harris
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Publication number: 20100329970Abstract: A method for the recovery of copper, indium, gallium, and selenium is provided. The method includes steps of using a mixed solution containing a hydrochloric acid and hydrogen peroxide to dissolve the copper, indium, gallium, and selenium. After using the hydrazine to separate the selenium out, the copper is reduced by indium metal. Later, a combination of a supported liquid membrane (SLM) and a strip dispersion solution separates the gallium from the indium. The acid performed in all the steps of the method is hydrochloric acid. Therefore, the copper, indium, gallium, and selenium can be separated one by one in a single production line without changing the solution during the operation process, thereby simplifying the process, shortening the operation time and lowering the manufacture cost.Type: ApplicationFiled: September 1, 2010Publication date: December 30, 2010Applicant: SOLAR APPLIED MATERIALS TECHNOLOGY CORP.Inventors: Jian-Jou LIAN, I-Wen HUANG, Chung-Ching LEE, Hai-Jui CHEN
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Patent number: 7857888Abstract: A method for separation and recovery of noble metals which makes it possible to isolate noble metal components efficiently by easy operation, that is, a method which comprises passing a solution of metals in hydrochloric acid prepared by treating a metal material with hydrochloric acid through the first cellulose column, eluting through development the noble metal component adsorbed on the cellulose with a hydrochloric acid/2-propanone mixture to obtain a fraction containing light platinum-group metals and a fraction containing heavy platinum-group metals and gold, separating the former fraction with the above mixture into fractions containing palladium, ruthenium and rhodium respectively, passing the fraction containing heavy platinum-group metals and gold through the second cellulose column to made them adsorbed on the cellulose, eluting them from the cellulose with a hydrochloric acid/1-butanol mixture to obtain fractions containing gold, osmium, iridium and platinum respectively, and recovering the nobleType: GrantFiled: January 12, 2007Date of Patent: December 28, 2010Assignees: Asaka Riken Co., Ltd.Inventors: Kazuhiro Niisawa, Kazuo Shimizu, Tadashi Nozaki
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Patent number: 7842274Abstract: The invention is directed to a process for manufacture of fine precious metal containing particles, specifically silver-based particles and silver-based contact materials via an intermediate silver(+1)-oxide species. The process comprises in a first step the formation of a thermally instable silver (+1)-oxide species by adding a base to an aqueous silver salt solution comprising an organic dispersing agent. Due to the presence of the organic dispersing agent, the resulting silver (+1)-oxide species is thermally instable, thus the species is decomposing to metallic silver at temperature lower than 100° C. The process optionally may comprise the addition of a powdered compound selected from the group of inorganic oxides, metals, and carbon-based compounds. Furthermore the process may contain additional separating and drying steps. The process is versatile, cost efficient and environmentally friendly and is used for the manufacture of silver-based particles and electrical contact materials.Type: GrantFiled: March 31, 2006Date of Patent: November 30, 2010Assignee: Umicore, S.A.Inventors: Dan Goia, Sebastian Fritzsche, Bernd Kempf, Peter Braumann, Thierry Charles Simon Vandevelde
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Publication number: 20100288079Abstract: A method for recovering catalytic elements from a fuel cell membrane electrode assembly is provided. The method includes converting the membrane electrode assembly into a particulate material, wetting the particulate material, forming a slurry comprising the wetted particulate material and an acid leachate adapted to dissolve at least one of the catalytic elements into a soluble catalytic element salt, separating the slurry into a depleted particulate material and a supernatant containing the catalytic element salt, and washing the depleted particulate material to remove any catalytic element salt retained within pores in the depleted particulate material.Type: ApplicationFiled: May 15, 2009Publication date: November 18, 2010Applicant: BASF Catalysts LLCInventors: Lawrence Shore, Ramail Matlin, Robert Heinz
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Publication number: 20100275734Abstract: The present invention provides a method of purifying 68Ge/68Ga generator produced 68Ga from Fe (III). The invention further relates to an automated system within an existing Gallea Synthia prototype that provides purification 68Ga from various cations and preconcentrations of 68Ga. In general, the present invention further depicts the use of an automated system for the production of 68Ga-radiolabelled PET tracers with high specific radioactivity and a kit for purifying 68Ge/68Ga generator produced 68Ga from Fe (III).Type: ApplicationFiled: December 1, 2008Publication date: November 4, 2010Inventors: Bengt Langstrom, Irina Velikyan
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Patent number: 7794677Abstract: Methods and systems for removing copper minerals from a molybdenite concentrate. One embodiment provides leaching copper from the molybdenite concentrate with a leaching solution comprising ferric chloride, removing molybdenite from the leaching solution, introducing an acid into the leaching solution and introducing O2, O3, or a combination of both, into the leaching solution. A method for regenerating ferric chloride in a leaching solution is also provided. One embodiment provides adding a leaching solution comprising Fe(II) ions, Fe(III) ions, or a combination of both, to a mixture of mineral sulfides, introducing an acid into the leaching solution, and introducing O2, O3, or a combination of both, into the leaching solution.Type: GrantFiled: December 21, 2009Date of Patent: September 14, 2010Assignee: Air Liquide Canada, Inc.Inventors: Javier Jara, Sylvester Zuttah
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Patent number: 7776442Abstract: A nanoparticle powder of silver has an average particle diameter measured by TEM observation (DTEM) of 30 nm or less, an aspect ratio of less than 1.5, an X-ray crystallite size (Dx) of 30 nm or less, a degree of single crystal grain {(DTEM)/(Dx)} of 5.0 or less, and a CV value {100×standard deviation (?)/number average diameter (DTEM)} of less than 40%. The nanoparticle powder of silver has adhered to the particle surface thereof an organic protective agent having a molecular weight of 100 to 400. The nanoparticle powder is obtained by subjecting a silver salt to reduction treatment at a temperature of 85 to 150° C. in an alcohol having a boiling point of 85 to 150° C. and in the co-presence of an organic protective agent.Type: GrantFiled: February 1, 2006Date of Patent: August 17, 2010Assignee: Dowa Electronics Materials Co., Ltd.Inventor: Kimitaka Sato
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Patent number: 7763096Abstract: The present invention relates to a method for recovering rhenium from an ethylene oxide catalyst containing rhenium and at least silver on a solid support, wherein at least a substantial portion of the rhenium present in the catalyst is extracted by intimate contact of the catalyst with one or more polar non-acidic organic solvents substantially free of water such that a rhenium-containing solution is formed containing the polar non-acidic organic solvent and extracted rhenium, the polar non-acidic organic solvent containing one or more oxygen, nitrogen, and/or halogen atoms in its molecular structure.Type: GrantFiled: May 6, 2008Date of Patent: July 27, 2010Assignee: SD Lizenzverwertungsgesellschaft mbH & Co. KGInventors: Nabil Rizkalla, Andrzej Rokicki
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Patent number: 7641714Abstract: A method for recovering metal values from refractory sulfide ores is provided. The method includes the steps of separating clays and fines from crushed refractory sulfide ore, forming a heap from the refractory sulfide ore, producing a concentrate of refractory sulfide minerals from the separated fines and adding the concentrate to the heap, bioleaching the heap to thereby oxidize iron sulfides contained therein, and hydrometallurgically treating the bioleached ore to recover metal values contained therein.Type: GrantFiled: September 30, 2008Date of Patent: January 5, 2010Assignee: Geo Biotics, LLCInventor: William J. Kohr
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Patent number: 7628840Abstract: Each of the metal nano-particles present in a dispersion, which comprises at least one metal selected from the group consisting of precious metals and transition metals or an alloy of at least two metals selected from the foregoing metals, comprises a metal particle in which an organic metal compound of a fatty acid and/or an amine-metal complex is adhered to the periphery of the metal particle. This organic metal compound and the amine-metal complex are admixed together in a solvent and then the resulting mixture is subjected to a reducing treatment to thus form a dispersion containing metal nano-particles in a concentration of not less than 5% by mass and not more than 90% by mass. The resulting dispersion is applied onto the surface of a base material, followed by drying the applied layer of the dispersion and then firing the dried layer of the dispersion at a low temperature to thus form a thin metallic wire or a metal film having conductivity.Type: GrantFiled: September 7, 2004Date of Patent: December 8, 2009Assignees: ULVAC, Inc., JEMCO, Inc.Inventors: Tsutomu Atsuki, Masaaki Oda, Toshiharu Hayashi, Reiko Kiyoshima
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Publication number: 20090286678Abstract: The present invention is directed to methods for making metal oxide compositions, specifically, metal oxide compositions having high surface area, high metal/metal oxide content, and/or thermal stability with inexpensive and easy to handle materials. In one embodiment, the present invention is directed to methods of making metal and/or metal oxide compositions, such as supported or unsupported catalysts. The method includes combining a metal precursor with an organic acid to form a mixture and calcining the mixture for a period of time sufficient to form a metal oxide material.Type: ApplicationFiled: May 2, 2006Publication date: November 19, 2009Applicant: Symyx Technologies, Inc.Inventor: Alfred Hagemeyer
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Patent number: 7582136Abstract: A process for the recovery of gold from a potassium iodide-iodine solution is provided. The gold is precipitated from the solution using a weak acid, (e.g. ascorbic acid), a buffer, (e.g. sodium bicarbonate), and a dye. The precipitate is then removed from the solution resulting in the recovery the gold precipitate and the potassium iodide-iodine solution.Type: GrantFiled: March 28, 2007Date of Patent: September 1, 2009Assignee: Union Etchants International, Inc.Inventor: Robert E. Union
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Patent number: 7563304Abstract: A heap bioleaching process wherein carbon, in the form of a carbonate, carbon dioxide or organic carbon, is added to the heap when the temperature in the heap is in the range of 45° C. to 60° C. to increase microbial activity and thereby raise the heap temperature to about 60° C.Type: GrantFiled: July 31, 2006Date of Patent: July 21, 2009Assignee: BHP Billiton SA LimitedInventors: Chris Andre Du Plessis, Sanet H. De Kock
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Publication number: 20090158896Abstract: The present invention relates to the use of monodisperse, macroporous chelating resins in the recovery of metals in hydrometallurgical processes, in particular in resin-in-pulp processes.Type: ApplicationFiled: January 26, 2007Publication date: June 25, 2009Inventors: Duilio Rossoni, Reinhold Klipper, Bruno Hees, Rudolf Wagner, Stefan Neumann, Olaf Halle, Wolfgang Podszun, Michael Schelhaas
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Publication number: 20090049954Abstract: The membrane electrode assemblies of fuel cells are recycled by pulverizing the membrane electrode assemblies into a powder and contacting with acid to leach precious metals. Surfactants can optionally be used to increase yield of precious metals recovered.Type: ApplicationFiled: August 24, 2007Publication date: February 26, 2009Applicant: BASF CATALYSTS LLCInventors: Lawrence Shore, Ramail Matlin
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Patent number: 7455716Abstract: A heap is constructed with hypogenic copper sulfide bearing ore to include exposed sulfide mineral particles at least 25 weight % of which are hypogenic copper sulfides. The concentration of the exposed sulfide mineral particles is such that the heap includes at least 10 Kg of exposed sulfide sulfur per tonne of solids in the heap. At least 50% of the total copper in the heap is in the form of hypogenic copper sulfides. A substantial portion of the heap is heated to at least 50° C. The heap is inoculated with a thermophilic microorganism, and bioleaching is carried out so that sufficient sulfide mineral particles in the heap are biooxidized to oxidize at least 10 Kg of sulfide sulfur per tonne of solids in the heap and to cause the dissolution of at least 50% of the copper in the heap in a relatively short period of time.Type: GrantFiled: January 9, 2007Date of Patent: November 25, 2008Assignee: Geobiotics, LLCInventors: William J. Kohr, Vandy Shrader, Chris Johansson
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Patent number: 7429286Abstract: A method of recovering precious metal values from refractory sulfide ores is provided. The method includes the steps of separating clays and fines from a crushed refractory sulfide ore, forming a heap from the refractory sulfide ore, producing a concentrate of refractory sulfide minerals from the separated fines and adding the concentrate to the heap, bioleaching the heap to thereby oxidize iron sulfides contained therein, and hydrometallurgically treating the bioleached ore to recover precious metal values contained therein.Type: GrantFiled: January 2, 2007Date of Patent: September 30, 2008Assignee: Geobiotics, LLCInventor: William J. Kohr
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Publication number: 20080184849Abstract: A method for extraction a metal from a mineral ore including a refractory ore contained in a metal. The method includes concentration of refractory ore followed by micronization of the concentrate until gold is liberated by the extraction solution and mixing of micronized concentrate with concentration rejects or by-products to facilitate recovery of the treatment solution.Type: ApplicationFiled: August 17, 2006Publication date: August 7, 2008Inventors: Gilles Fiset, Edmond St-Jean
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Patent number: 7214644Abstract: A method for producing a copper/palladium colloid catalyst useful for Suzuki couplings.Type: GrantFiled: July 30, 2004Date of Patent: May 8, 2007Assignee: Xerox CorporationInventors: Jennifer A. Coggan, Nan-Xing Hu, H. Bruce Goodbrand, Timothy P. Bender
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Patent number: 7214256Abstract: A circuit configuration for a metal solvent extraction plant comprising: A) an extraction section for extracting metal ions from an aqueous leach solution containing the metal ions with an organic solvent solution containing at least one metal extraction reagent, wherein the extraction section consists of three countercurrent extraction stages; and B) a stripping section consisting of one stripping stage for stripping the metal ions from the metal extraction reagent.Type: GrantFiled: July 31, 2003Date of Patent: May 8, 2007Assignee: Cognis CorporationInventors: Gary A. Kordosky, Hans Hein Steger
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Patent number: 7160354Abstract: A heap is constructed with hypogenic copper sulfide bearing ore to include exposed sulfide mineral particles at least 25 weight % of which are hypogenic copper sulfides. The concentration of the exposed sulfide mineral particles is such that the heap includes at least 10 Kg of exposed sulfide sulfur per tonne of solids in the heap. At least 50% of the total copper in the heap is in the form of hypogenic copper sulfides. A substantial portion of the heap is heated to at least 50° C. The heap is inoculated with a thermophilic microorganism, and bioleaching is carried out so that sufficient sulfide mineral particles in the heap are biooxidized to oxidize at least 10 Kg of sulfide sulfur per tonne of solids in the heap and to cause the dissolution of at least 50% of the copper in the heap in a relatively short period of time.Type: GrantFiled: October 12, 2004Date of Patent: January 9, 2007Assignee: Geobiotics, LLCInventors: William J. Kohr, Vandy Shrader, Chris Johansson
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Patent number: 6977050Abstract: The present invention relates to a method of synthesizing lignosulfonic acid-doped polyaniline by oxidatively polymerizing aniline in the presence of transition metal ions selected from the group consisting of Ag(I), Fe(II), and Fe(III) salts. The present invention also relates to a method for the preparation of transition metals from transition metal salts by exposing transition metal ion containing materials to an aqueous dispersion of lignosulfonic acid-doped polyaniline.Type: GrantFiled: April 7, 2004Date of Patent: December 20, 2005Assignee: Polyone CorporationInventor: Tito Viswanathan
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Publication number: 20040226408Abstract: A method of recovering microbial cells in a bioleaching process which includes the steps of subjecting a slurry produced in a bioleaching plant to a solid/liquid separation process, and extracting microbial cells from the resulting liquid.Type: ApplicationFiled: January 14, 2004Publication date: November 18, 2004Inventor: Chris Andre Du Plessis
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Publication number: 20040173056Abstract: An improved method for plating an organic substrate with silver is disclosed. Improved plating is achieved in part through the use of Na4EDTA, which facilitates improved grain formation and recovery of silver from waste material. Articles prepared using the method of the invention are also disclosed.Type: ApplicationFiled: September 19, 2003Publication date: September 9, 2004Inventors: William F. McNally, Satish Chandra, Vinesh Naik, Joel M. Furey
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Publication number: 20040103756Abstract: A circuit configuration for a metal solvent extraction plant comprising:Type: ApplicationFiled: July 31, 2003Publication date: June 3, 2004Inventors: Gary A. Kordosky, Hans Hein Steger
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Patent number: 6706795Abstract: The present invention relates to a method for the production of particles of nano-materials being transition metals and alloys; metal oxides; and ceramic compositions having a small nanosize, i.e. about 1-6 nm. The method comprises a synthesis in the solutions of complex liquids from suitable precursors, which precursors are selected from suitable surfactants and alkoxides, by a suitable chemical reaction under mild conditions; and preparing from said materials fine colloids dispersed in various polymer solutions. The water in the solution is preferably non freezing water, the mild conditions are atmospheric pressure and a temperature range of room temperature to 70° C., and the reaction condition is selected among a hydrolysis, reduction and exchange process.Type: GrantFiled: September 11, 2000Date of Patent: March 16, 2004Assignee: Yissum Research Development Company of the Hebrew University of JerusalemInventors: Nissim Garti, Yana Berkovich
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Publication number: 20030167879Abstract: A method of leaching sulphide mineral concentrates wherein heat generated by bioleaching of sulphide mineral concentrates in at least one reactor is transferred into a heap in which bio-assisted leaching takes place.Type: ApplicationFiled: March 28, 2003Publication date: September 11, 2003Applicant: BILLITON SA LIMITED.Inventors: John de Klerk Batty, Alan Norton
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Patent number: 6599414Abstract: An improvement in the solvent extraction process for recovering metal values, i.e. copper, from acidic aqueous solutions containing copper and iron which may also include chloride, and more particularly to an improvement which provides for increased copper to iron ratios in the loaded organic extractant phase. The improvement comprises washing the loaded organic extractant phase prior to stripping of the copper values therefrom with an aqueous acidic wash solution containing at least a portion of electrolyte solution, wherein the wash solution or the electrolyte solution has been previously contacted with copper metal.Type: GrantFiled: August 7, 2001Date of Patent: July 29, 2003Assignee: Cognis CorporationInventors: Michael J. Virnig, G. Timothy Fisher
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Patent number: 6596053Abstract: A process for the recovery of copper from an aqueous phase containing nitrate ions, in which the aqueous phase is contacted with a solution of an oxime extractant in a water-immiscible organic solvent, which comprises using at least one of the following process variants: I) reducing the acidity of the aqueous phase prior to contact with the organic solution; and II) reducing the electromotive force in the aqueous phase prior to contact with the organic solution.Type: GrantFiled: January 15, 2002Date of Patent: July 22, 2003Assignee: Cognis CorporationInventors: Michael J. Virnig, Phillip L. Mattison, Hans C. Hein