Platinum(pt) Patents (Class 75/633)
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Patent number: 8833434Abstract: A method for making hollow metal tubes includes a step combining a polyphenylene sulfide-containing resin with a water soluble carrier resin to form a resinous mixture. The resinous mixture is then extruded to form an extruded resinous mixture. The extruded resinous mixture includes polyphenylene sulfide-containing fibers within the carrier resin. The extruded resinous mixture is contacted (i.e., washed) with water to separate the polyphenylene sulfide-containing fibers from the carrier resin. The polyphenylene sulfide-containing fibers are then coated with a metal layer. The hollow metal tubes are then formed by removing the polyphenylene sulfide-containing fibers.Type: GrantFiled: June 8, 2012Date of Patent: September 16, 2014Assignee: GM Global Technology Operations LLCInventors: James Mitchell, Timothy J. Fuller, Lijun Zou
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Publication number: 20140150608Abstract: Provided is a method of unevenly distributing a specific element in a copper phase out of platinum group elements that exist in the copper phase, including further adding copper into a molten copper phase containing the platinum group elements including at least rhodium, thereby increasing a distribution ratio of rhodium in the molten copper phase.Type: ApplicationFiled: March 7, 2012Publication date: June 5, 2014Applicants: DOWA METALS & MINING CO., LTD., TANAKA KIKINZOKU KOGYO K.K.Inventors: Yuzuru Nakamura, Minoru Kawasaki, Katsunori Yamaguchi, Tetsuya Ueda, Keiko Ishizaki
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Patent number: 8557020Abstract: A compound represented by General Formula (1) below, where R denotes a C1-C10 hydrocarbon group, Z denotes any one of a sulfide group, a sulfinyl group and a sulfonyl group, and n denotes an integer of 4 to 8 is described. A method for extracting metals and a metal recovery method using a metal extractant comprising the compound represented by General Formula (1) are also described.Type: GrantFiled: March 2, 2011Date of Patent: October 15, 2013Assignees: Dowa Holdings Co., Ltd., Akita UniversityInventors: Fumio Hamada, Chun-Bin Li, Yoshihiko Kondo
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Publication number: 20130139648Abstract: A high purity platinum recovery method including the steps of dissolving a platinum alloy containing ruthenium in aqua regia and eliminating residue, thereafter causing acid with platinum dissolved therein and an ammonium chloride solution to react so as to deposit chloroplatinic ammonium salt, and reducing the chloroplatinic ammonium salt to obtain a platinum sponge. The method is characterized in that acid with platinum dissolved therein and the ammonium chloride solution are caused to react at a temperature of 40° C. or higher.Type: ApplicationFiled: June 21, 2011Publication date: June 6, 2013Applicant: JX Nippon Mining & Metals CorporationInventor: Junnosuke Sekiguchi
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Publication number: 20120301383Abstract: The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character.Type: ApplicationFiled: March 20, 2012Publication date: November 29, 2012Inventor: Christopher J. Nagel
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Patent number: 8287804Abstract: In the method for recovering a metal from a target that contains a metal and a metal oxide, the target contains a sintered body of the metal oxide after being heated under a condition of melting the metal without melting or decomposing the metal oxide. The target is heated in an upper crucible of a two-level crucible that includes the upper crucible with a through hole-formed in a bottom surface thereof, and a lower crucible disposed below the through hole, the size of the through hole being set such that it does not allow the sintered body of the metal oxide contained in the target to pass therethrough, and the melted metal is caused to flow into the lower crucible, so that the metal is separated from the metal oxide.Type: GrantFiled: December 8, 2009Date of Patent: October 16, 2012Assignee: Tanaka Holdings Co., LtdInventors: Toshiya Yamamoto, Takanobu Miyashita, Kiyoshi Higuchi, Yasuyuki Goto
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Patent number: 8114188Abstract: In the formation of sheet material from molten glass, molten glass is formed in a melting furnace and transported through a precious metal delivery system to the forming apparatus. Disclosed herein is a method to eliminate carbon-containing contamination of individual components of the precious metal delivery system prior to their installation and use. The method comprises one or more heat treating steps in an oxygen-containing atmosphere prior to and/or during assembly of the component.Type: GrantFiled: August 30, 2010Date of Patent: February 14, 2012Assignee: Corning IncorporatedInventors: Martin H. Goller, David M. Lineman, Steven R. Moshier
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Publication number: 20120011966Abstract: The present invention relates to the use of liquid-crystal displays (LCDs), and to processes for the recycling thereof. The processes according to the invention are characterised in that the LCDs are employed at least partly as replacement for other raw materials. In general, the LCDs are thermally treated here at a temperature in the range from 900 to 1700° C.Type: ApplicationFiled: September 22, 2011Publication date: January 19, 2012Inventor: Roland MARTIN
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Publication number: 20110243784Abstract: In the method for recovering a metal from a target that contains a metal and a metal oxide, the target contains a sintered body of the metal oxide after being heated under a condition of melting the metal without melting or decomposing the metal oxide. The target is heated in an upper crucible of a two-level crucible that includes the upper crucible with a through hole-formed in a bottom surface thereof, and a lower crucible disposed below the through hole, the size of the through hole being set such that it does not allow the sintered body of the metal oxide contained in the target to pass therethrough, and the melted metal is caused to flow into the lower crucible, so that the metal is separated from the metal oxide.Type: ApplicationFiled: December 8, 2009Publication date: October 6, 2011Applicant: TANAKA HOLDINGS CO., LTD.Inventors: Toshiya Yamamoto, Takanobu Miyashita, Kiyoshi Higuchi, Yasuyuki Goto
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Publication number: 20100326237Abstract: The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character.Type: ApplicationFiled: February 23, 2010Publication date: December 30, 2010Inventor: Christopher J. Nagel
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Patent number: 7819941Abstract: The invention relates to a method for reducing and/or refining a metal-containing slag. The aim of the invention is to improve reduction of the slag. For this purpose, calcium carbide (CaC2) is added to the slag as the reducing agent.Type: GrantFiled: June 8, 2006Date of Patent: October 26, 2010Assignee: SMS Siemag AktiengesellschaftInventors: Jürgen Kunze, Rolf Degel, Dieter Borgwardt, Andrzej Warczok, Gabriel Angel Riveros Urzua, Marco Antonio Caceres Rivera, Roberto Marcelo Parada Araya
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Patent number: 7309353Abstract: A method of texturing polycrystalline iridium includes the steps of cold/warm working of the polycrystalline iridium at equal to or below its re-crystallization temperature to break up the polycrystalline structure such that the orientation favors one direction (i.e. the <110> direction), and re-crystallizing the iridium such that a majority of grains are aligned in the preferred direction. The textured polycrystalline material is then used in vascular devices such as stents.Type: GrantFiled: April 29, 2005Date of Patent: December 18, 2007Assignee: Medtronic Vascular, Inc.Inventor: Mike Krivoruchko
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Patent number: 7083731Abstract: A method for the recovery of a metal from a liquid medium containing the metal I solution or in finely divided insoluble from comprises contacting the medium with a functionalized polymer fiber capable of binding the metal and recovering the metal from the fiber. The polymer fiber is suitably a polyolefin, a fluorinated polyethylene, cellulose or viscose, which is functionalized by the radiation grafting of at least one monomer. The method is particularly suitable for the recovery of platinum group metals from process residues.Type: GrantFiled: October 11, 2001Date of Patent: August 1, 2006Assignee: Johnson Matthey Public Limited CompanyInventors: Kenneth Ekman, Robert Peltonen, Mars Sundell, Richard Alfred Teichman, III
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Patent number: 7066981Abstract: The invention provides a method of assaying a mineral sample for determining the concentration of selected metals in a sample comprising the steps of providing a comminuted mineral sample; mixing such sample with a flux; preheating a reaction vessel to a temperature which approximates the melting point of the flux; introducing the mixture of the mineral sample and flux into the crucible, whereby the mixture is transformed to a molten state to capture the metal to be assayed in a collector material; and separating slag from the collector material.Type: GrantFiled: July 12, 2001Date of Patent: June 27, 2006Assignee: Innovative MET Products (PTY) LimitedInventors: George M. Cowan, Boyne F. Hohenstein, Keith S. McIntosh, Pierre K. Hofmeyer
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Patent number: 6827837Abstract: The present invention is directed to a method for the recovery of one or more trace elements including gold and one or more platinum group elements from coal. More particularly, the present invention may specify parameters for the selection of coal for combustion, the parameters for combustion of the pre-selected coal, the parameters for the preparation and mixing of a charge for a furnace including ash from the combustion of the coal with an inquart and a fluxing agent, the parameters for the heating of the charge and casting of a dore bar and the parameters for the production of an anode slime from the dore bar. The method of the present invention may also specify parameters for the recovery of silver, gold and one or more trace platinum group elements from the anode slimes.Type: GrantFiled: November 22, 2002Date of Patent: December 7, 2004Inventor: Bruce E. Minter
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Patent number: 6663728Abstract: A gold-free platinum material that is dispersion-strengthened by small, finely dispersed particles of base metal oxide. The base metal is either 0.01-0.5 wt. % Sc or a mixture/alloy of Sc and at least one metal from the group consisting of Zr, Y, and Ce with a total base metal content of 0.05-0.5 wt. %.Type: GrantFiled: September 4, 2001Date of Patent: December 16, 2003Assignee: W.C. Heraeus GmbH & Co. KGInventors: Harald Manhardt, David Francis Lupton, Wulf Kock
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Patent number: 6626978Abstract: A material benefication process and device for dressing a material comprising noble metals including platinum group metals. The device includes a reactor vessel with an inlet and an outlet for the processing medium. The material to be processed and a holder for the material are located inside the reactor vessel. The holder has a device for distributing the used processing medium flow. The process includes subjecting the material to an oxidizing treatment at a temperature within a first distinct temperature range, subjecting the material to a reducing treatment at a temperature within a second distinct temperature range, and chlorinating the material at a temperature within a third distinct temperature range different from at least the first distinct temperature range.Type: GrantFiled: July 29, 1996Date of Patent: September 30, 2003Assignee: Prior Engineering AGInventor: Adalbert Prior
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Patent number: 6555010Abstract: A process is disclosed for obtaining colloid-forming metal particles from an aqueous mine waste solution containing that metal in ionic form. In accordance with this process, an aqueous mine waste solution containing that metal in ionic form is provided having a pH value of about 4.0 to about 6.5. The solution is electrified with direct current a about 1.2 to about 2.0 volts to reduce the desired metal ions to colloidal metal particles. A slurry of cellulose particles is agitatingly added to the colloid composition followed by a flocculant to form a solid phase cellulosic floc containing the colloid. The solid and liquid phases are separated, and the solid phase is dried, fluxed and heated to a temperature sufficient to melt the flux and colloid and form larger metal particles that can then be recovered. The colloid-forming metal is preferably gold.Type: GrantFiled: February 14, 2001Date of Patent: April 29, 2003Inventor: Keith Barrett
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Patent number: 6428602Abstract: A method for recovering Pt from Pt-bearing coating on a gas turbine engine component. The component is contacted with a chemical stripping agent to dissolve away constituents of the coating and produce a Pt-bearing film of acid oxidation products at the surface of the component. The film is removed from the component to produce a Pt-rich residue containing at least about 10% Pt. The Pt-rich residue is collected and refined to recover Pt therefrom.Type: GrantFiled: January 31, 2000Date of Patent: August 6, 2002Assignee: General Electric CompanyInventors: Mark A. Rosenzweig, Keith H. Betscher, Christopher J. Cunningham, Howard J. Farr, Leo S. MacDonald
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Patent number: 5797977Abstract: A neutralizing reagent is added to a solution of chloroplatinic acid containing impurities to adjust the pH value of the solution to 5.5-7.0, the insoluble impurity compounds that precipitated in this first neutralization step is filtrated off, a neutralizing reagent is added to the first filtrate of chloroplatinic acid to adjust the pH value of the solution to 9.5-10.5, the insoluble impurity compounds that precipitated out in the second neutralization step is filtrated off, hydrochloric acid is then added to the second filtrate in which the insoluble impurity compounds have been removed, and ammonium chloride is added to the processed solution to convert platinum compound to ammonium chloroplatinate, which is intensely heated to yield platinum sponge. The preferred neutralizing reagent is NaOH or KOH. Filtration is preferably performed with a filter of which opening size is equal or less than 0.3 .mu.m.Type: GrantFiled: February 20, 1997Date of Patent: August 25, 1998Assignee: Nippon Mining & Metals Co., Ltd.Inventor: Katutoshi Narita
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Patent number: 5279644Abstract: A new environmentally safe fire refining precious metal assay method is provided wherein bismuth oxide is used with a special flux composition as the precious metal collector and the cupelling procedure is performed in a controlled temperature range.Type: GrantFiled: February 18, 1993Date of Patent: January 18, 1994Assignee: ASARCO IncorporatedInventor: David W. Francisco
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Patent number: 5238485Abstract: Complex ores of the precious metals which also contain iron spinels and similar compounds are assayed and their precious metals content is extracted by subjecting the ores or concentrates thereof together with an iron-embrittling agent to a pyrometallurgical process which reduces at least a major portion of the iron compounds to liquid metallic iron. The liquid iron serves as a collector metal for the precious metals and, after cooling, the iron is brittle and easily comminuted and can be separated from the precious metals through use of either an electrolytic process or a selective chemical dissolution of the iron and other base metals leaving the precious metals available for analysis and recovery.Type: GrantFiled: December 22, 1992Date of Patent: August 24, 1993Inventor: Roland H. Shubert
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Patent number: 5238662Abstract: Disclosed is a process for recovering precious metals using a combination of smelting and an effective utilization of molten salt chlorination. More specifically, disclosed is a process including the steps of (i) contacting, for example, a matte with a chloride salt containing at least one of potassium, cesium or rubidium, but not sodium or lithium to form a matte/salt solids mixture, (ii) introducing the solids mixture into a chloride melt having a temperature ranging from 300.degree. C. to 650.degree. C., said melt containing at least one of potassium, cesium, rubidium, sodium or lithium, (iii) introducing a chlorine containing gas into the melt, and (iv) maintaining the salt ratio in the matte/salt mixture at a stoichiometrically equivalent amount with the precious metals and base metals contained in the matte.Type: GrantFiled: May 11, 1992Date of Patent: August 24, 1993Assignee: Chevron Research CompanyInventor: Michael Dubrovsky
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Patent number: 5102632Abstract: A two-stage method of recovering the noble metal content of a mixture of noble metals, for example, platinum, palladium, and rhodium, this mixture being, for example, comprises on or throughout a pellet or on or throughout a ceramic monolith of a spent catalyst, the method comprising first reductive chlorination at an elevated temperature by a gaseous chlorinating agent in the presence of a reducing agent (preferably the reducing agents sulfur dioxide and carbon monoxide in stages); minimizing the amount of aluminum trichloride formed from either washcoat or underlying ceramic chlorination, and separating the aluminum trichloride or other washcoat chlorides from the products of chlorination of the noble metals, as by sublimation of the former in a reducing atmosphere at a temperature below the vaporization temperatures of the latter, thereby recovering the noble metal chlorides in a concentrated form.Type: GrantFiled: December 21, 1990Date of Patent: April 7, 1992Assignee: Metallgesellschaft AktiengesellschaftInventors: Robert J. Allen, Peter C. Foller, James Giallombardo
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Patent number: 5084092Abstract: A method of separating metals from carbon-supported catalyst materials comprises the steps of combusting the carbon at a temperature insufficient to cause volatisation of the metal followed by reduction with hydrogen of any oxidised metal and washing with acid or water.Type: GrantFiled: August 16, 1988Date of Patent: January 28, 1992Assignee: The British Petroleum Company p.l.c.Inventors: David A. Campbell, Nicholas P. Wilkinson
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Patent number: 5076839Abstract: Feed mixtures containing one or more platinum group metals are fluorinated to form at least one volatile fluoride product which is separated from the residual solid. Separations of different fluorides may be effected by collecting different fractions of volatile fluorides. Palladium does not form a volatile fluoride and is retained in the residual solid.Type: GrantFiled: June 12, 1990Date of Patent: December 31, 1991Assignee: Johnson Matthey Public Limited CompanyInventors: David A. Boyd, John H. Holloway, Gillian Stanger
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Patent number: 5074910Abstract: The present invention is a process to recover precious metals from sulfide ores. It involves chlorinating a mixture of an ore concentrate and salt to form a liquid melt. The salt preferably contains potassium chloride. This chlorination is carried out at a temperature between 300.degree. and 600.degree. C. while stirring. The process converts precious metals in the elemental and sulfide forms into precious metal chlorides which are recovered by subsequent processing steps.Type: GrantFiled: February 28, 1990Date of Patent: December 24, 1991Assignee: Chevron Research and Technology CompanyInventor: Michael Dubrovsky