Forming Insoluble Substance In Liquid Patents (Class 423/42)
  • Patent number: 10526683
    Abstract: The present invention relates to a process for the selective and ecoefficient recovery of lead and silver jointly as a concentrate product from hydrometallurgical residues.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: January 7, 2020
    Assignee: Ténicas Reunidas, S.A.
    Inventors: Carlos Alvarez Carreño, Maite Pinedo González, Emilio Pecharromán Mercado, Nuria Ocaña García, Maria Frades Tapia
  • Patent number: 8927637
    Abstract: A polymer, a composition, and uses for either are disclosed. The polymer is derived from at least two monomers: acrylic-x and an alkylamine, and has attached to the polymer backbone a functional group capable of scavenging at least one metal. The polymer has a polymer backbone with a fluorescing quantity of conjugated double bonds, thereby providing a method for controlling metal scavenging via fluorescence. These polymers have many uses in various media, including wastewater systems.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: January 6, 2015
    Assignee: Nalco Company
    Inventors: Paul J. Zinn, Winston Su, Rebecca L. Stiles, Darlington Mlambo
  • Patent number: 8852541
    Abstract: Systems and methods for removing impurities from a feed fluid in a single vessel. A method generally includes, in single vessel, contacting a feed fluid passing through the vessel with a copper-based material for removing oxygen from the feed fluid; and contacting the feed fluid passing through the vessel with an adsorbent for removing at least one of water, carbon dioxide, and oxygenated hydrocarbons from the feed fluid.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: October 7, 2014
    Assignee: Univation Technologies, LLC
    Inventors: Ronald S. Eisinger, David M. Gaines
  • Patent number: 8753599
    Abstract: A method and composition for the reduction of the emission of selenium into the environment from the burning of fossil fuels with the use of two chemistries, either individually or in combination with each other. The method uses polydithiocarbamic compounds, including polydithiocarbamic compounds derived from a polymer produced from acrylic-x and alkylamine in conjunction with a scrubber process to capture selenium and reduce its emission in aqueous phase blowdown. The method and composition also helps reduce corrosion in the scrubber process.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: June 17, 2014
    Assignee: Nalco Company
    Inventors: Bruce A. Keiser, Jitendra T. Shah, John V. Meier, Paul J. Zinn, Jianwei Yuan, Raul Espinosa, Rebecca L. Stiles, Richard Mimna, Wayne M. Carlson
  • Patent number: 8747789
    Abstract: A composition comprising a polymer derived from at least two monomers: acrylic-x and an alkylamine, wherein said polymer is modified to contain a functional group capable of scavenging one or more compositions containing one or more metals is disclosed. These polymers have many uses in various mediums, including wastewater systems.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: June 10, 2014
    Assignee: Nalco Company
    Inventors: Paul J. Zinn, Jitendra T. Shah, William J. Andrews
  • Publication number: 20140120012
    Abstract: A method for selectively processing a polymetallic oxide solution containing a plurality of base metals comprising at least one of: Cu, Co, Ni, Zn associated with iron, comprising acid leaching the solution; recovering a filtered leachate; oxidizing the leachate; and adjusting the pH of the leachate in presence of a complexing agent; wherein the acidic solution is one of: i) a hydrochloric acid solution and ii) a sulfuric acid solution at a pH lower than about 1.5, and the complexing agent is one of: i) ammonium chloride and ii) ammonium sulfate, the step of adjusting the pH comprising raising the pH to a range between about 2.5 and about 3.5.
    Type: Application
    Filed: November 13, 2012
    Publication date: May 1, 2014
    Applicant: Nichromet Extraction Inc.
    Inventors: Jean-Marc Lalancette, Bertrand Dubreuil, David Lemieux
  • Patent number: 8641821
    Abstract: Provided is a manufacturing device of an aluminum nitride single crystal including a crucible. An aluminum nitride raw material and a seed crystal are stored in an inner portion of the crucible. The seed crystal is placed so as to face the aluminum nitride raw material. The crucible includes an inner crucible and an outer crucible. The inner crucible stores the aluminum nitride raw material and the seed crystal inside the inner crucible. The inner crucible is also corrosion resistant to a sublimation gas of the aluminum nitride raw material. The inner crucible includes either, a single body of a metal having an ion radius larger than an ion radius of an aluminum, or includes a nitride of the metal. The outer crucible includes a boron nitride. The outer crucible covers the inner crucible.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: February 4, 2014
    Assignees: National Institute of Advanced Industrial Science and Technology, Fujikura Ltd.
    Inventors: Tomohisa Katou, Ichirou Nagai, Tomonori Miura, Hiroyuki Kamata
  • Patent number: 8609050
    Abstract: A method and composition for the reduction of the emission of selenium into the environment from the burning of fossil fuels with the use of two chemistries, either individually or in combination with each other. The method uses polydithiocarbamic compounds, including polydithiocarbamic compounds derived from a polymer produced from acrylic-x and alkylamine in conjunction with a scrubber process to capture selenium and reduce its emission in aqueous phase blowdown. The method and composition also helps reduce corrosion in the scrubber process.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: December 17, 2013
    Assignee: Nalco Company
    Inventors: Bruce A. Keiser, Jitendra T. Shah, John V. Meier, Paul J. Zinn, Jianwei Yuan, Raul Espinosa, Rebecca L. Stiles, Richard Mimna, Wayne M. Carlson
  • Patent number: 8349208
    Abstract: Processes for improving copper/iron selectivity in a solvent extraction circuit by contacting an acidic aqueous solution containing dissolved copper and iron ions with a solvent extraction composition including an orthohydroxyaryloxime, a selectivity modifier, and an equilibrium modifier, wherein the ratio of selectivity modifier to orthohydroxyaryloxime is from 0.001 to 0.05, thereby decreasing the copper:iron transfer ratio, are provided herein.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: January 8, 2013
    Assignee: Cytec Technology Corp.
    Inventors: Owen Stewart Tinkler, Keith Alan Cramer, Peter Eric Tetlow, John Campbell, Charles J. Maes
  • Patent number: 8343454
    Abstract: A Cu2O spherical assembly particle composition is composed of Cu2O spherical assembly particles, each of which is formed by agglomerating a plurality of Cu2O ultrafine particles that have an average diameter in the range from 1 to 100 nm and a standard deviation on the diameter in the range from 0 to 10%. The Cu2O spherical assembly particles have an average diameter in the range from 0.1 to 10 ?m and a standard deviation on the diameter in the range from 0 to 40%. This Cu2O spherical assembly particle composition is composed of Cu2O assembly particles with excellent uniformity, so it shows excellent properties such as realizing a good electric conductivity during a curing process for wiring. Accordingly, the spherical Cu2O assembly particle composition may be usefully used as precursors for solar energy conversion, magnetic storage medium, catalyst, gas sensor, and copper wire formation.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: January 1, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Woo-Ram Lee, Sang-Ho Kim, Sung-Ho Yoon
  • Publication number: 20120301375
    Abstract: A method of preparing basic metal carbonate selected from the group consisting of zinc carbonate, nickel carbonate, silver carbonate, cobalt carbonate, tin carbonate, lead carbonate, manganese carbonate, lithium carbonate, sodium carbonate, and potassium carbonate from metals comprising: contacting the metal with an aqueous solution comprising an amine, carbonic acid, and oxygen under conditions where the metal is converted into basic metal carbonate; and recovering the basic metal carbonate.
    Type: Application
    Filed: May 27, 2011
    Publication date: November 29, 2012
    Inventors: Jeff Miller, Brian Miller, Andrew Bourdeau
  • Publication number: 20120244050
    Abstract: A cleaning agent for a silver-containing composition is provided which can readily remove silver adhered to an object to be cleaned with excellent operability and low environmental loads. This cleaning agent for the silver-containing composition includes an iron nitrate aqueous solution and used to remove silver derived from a composition containing silver nanoparticles having an average diameter of 1 nm to 100 nm adhered to the object to be cleaned.
    Type: Application
    Filed: March 25, 2011
    Publication date: September 27, 2012
    Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.
    Inventors: Christopher J. WARGO, Kimitaka Sato
  • Patent number: 8211389
    Abstract: Uses for a composition comprising a polymer derived from at least two monomers: acrylic-x and an alkylamine, wherein said polymer is modified to contain a functional group capable of scavenging one or more compositions containing one or more metals are disclosed. These polymers have many uses in various mediums, including wastewater systems.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: July 3, 2012
    Assignee: Nalco Company
    Inventors: Paul J. Zinn, Jitendra T. Shah, William J. Andrews
  • Publication number: 20120114539
    Abstract: A process for recovering a metal chloride or mixed metal chloride from a solid waste material comprising recoverable metal containing constituents produced by lead, copper or zinc smelting and refining processes, said process comprising the steps of: (i) heating the solid waste material; (ii) treating the heated material of step (i) with a gaseous chloride to form a gaseous metal chloride containing product; and (iii) treating the gaseous metal chloride containing product of step (ii) to recover the metal chloride or mixed metal chloride. The metal chloride may be further treated to extract the metal itself.
    Type: Application
    Filed: January 15, 2010
    Publication date: May 10, 2012
    Applicant: MINEX TECHNOLOGIES LIMITED
    Inventors: Robert John Bowell, Keith Phillip Williams, Brian Matthew Dey
  • Patent number: 8048308
    Abstract: The invention relates to a process for separating, in an aqueous medium, at least one actinide element from one or more lanthanide elements by using at least one molecule which sequesters the said actinide element to be separated and membrane filtration, the said process successively comprising: a) a step of bringing at least one molecule which sequesters the said actinide element in contact with the aqueous medium, the said molecule not being retained in the non-complexed state by the said membrane and being capable of forming a complex with the actinide element to be separated, comprising the said element and at least two of the said sequestering molecules, which complex is capable of being retained by the membrane; b) a step of passing the aqueous medium over the membrane in order to form a permeate on one side, comprising an aqueous effluent depleted of the said actinide element, and a retentate comprising the said complex.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: November 1, 2011
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Gilles Bernier, Jean-Marc Adnet, Alain Favre-Reguillon, Gérard Le Buzit, Marc Lemaire, Stéphane Pellet-Rostaing, Antoine Sorin, Jacques Foos
  • Patent number: 8038979
    Abstract: Disclosed is a method of manufacturing a metal oxide nano powder comprising preparing a first dispersed solution by adding a nano-sized metal powder to water and dispersing the metal powder within the water, performing a hydration reaction of the first dispersed solution at a temperature of about 30 to about 70° C. to generate a precipitation, and filtering and drying the precipitation to prepare a metal oxide powder. Also, disclosed is a metal oxide nano powder manufactured by the method described above, and having any one of a bar-form, a cube-form, and a fiber-form.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: October 18, 2011
    Assignee: Korea Atomic Energy Research Institute
    Inventors: Chang Kyu Rhee, Min Ku Lee, Young Rang Uhm, Jin Ju Park, Byung Sun Han, Hi Min Lee, Seung-Hee Woo
  • Publication number: 20110229384
    Abstract: The present invention relates to a process for separating at least one first substance from a mixture comprising this at least one first substance and at least one second substance, comprising the steps of (A) bringing the mixture comprising at least one first substance and at least one second substance into contact with at least one surface-active substance, (B) if required, addition of at least one dispersing medium to the mixture obtained in step (A) in order to obtain a dispersion, and (C) separation of the adduct of at least one first substance and at least one surface-active substance from the dispersion from step (A) or (B), for example by means of flotation, at least one additive which is either a monomolecular compound comprising amino and carboxyl groups or derivatives thereof or a polymeric compound obtainable by reaction of alkylene oxides and/or aziridines, or mixtures thereof, being added to the mixture comprising at least one first substance and at least one second substance.
    Type: Application
    Filed: March 14, 2011
    Publication date: September 22, 2011
    Applicant: BASF SE
    Inventors: Alexej MICHAILOVSKI, Imme Domke, Frank Bozich, David F. Blackwood
  • Publication number: 20110123418
    Abstract: A process for the recovery of a metal sulfide from a metal ion containing solution, including the steps of: a) providing a slurry containing seed panicles of said metal sulfide; h) adding a sulfide ion containing solution to said slurry to form an activated seed slurry; c) mixing said activated seed slurry with said metal ion containing solution to thereby form a metal sulfide precipitate; and d) recovering said metal sulfide precipitate.
    Type: Application
    Filed: June 26, 2009
    Publication date: May 26, 2011
    Applicant: BHP BILLITON SSM DEVELOPMENT PTY LTD
    Inventor: Eric Girvan Roche
  • Patent number: 7935173
    Abstract: A hydrometallurgical process for the recovery of metals selected from the group consisting of platinum, palladium, rhodium, ruthenium, iridium, and gold (PM) from solids includes dissolving the PM and base metals in an acidic halide aqueous solution and precipitating the PM using substituted quaternary ammonium salts (SQAS). PM having multiple oxidation states may be oxidized or reduced to separate through differential solubility. Au-SQAS is separated by washing the precipitate with a suitable organic solvent. Rh-SQAS and other PM with multiple oxidation states are dissolved in a strong halide acid solution and oxidized to separate soluble Rh. Pb and Pd are separated by boiling the initial acidic halide aqueous solution of metals in an excess of SQAS. The Pb and Pd filtrate is oxidized and then Pd-SQAS is dissolved in aqueous ammonia and separated from insoluble Pb. A slurry of Ir-SQAS and Pt-SQAS are separated through dissolution of Ir-SQAS with NaNO2.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: May 3, 2011
    Assignee: Metals Recovery Technology Inc.
    Inventors: Joseph L. Thomas, Gerald F. Brem
  • Patent number: 7931880
    Abstract: An aqueous precipitation process for the preparation of particles comprising primarily silver sulfate, comprising reacting an aqueous soluble silver salt and an aqueous soluble source of inorganic sulfate ion in an agitated precipitation reactor vessel and precipitating particles comprising primarily silver sulfate, wherein the reaction and precipitation are performed in the presence of an aqueous soluble inorganic additive compound containing a cation capable of forming a sulfate salt that is less soluble than silver sulfate or a halide anion or an oxyanion capable of forming a silver salt that is less soluble than silver sulfate, the amount of additive being a minor molar percentage, relative to the molar amount of silver sulfate precipitated, and effective to result in precipitation of particles comprising primarily silver sulfate having a mean grain-size of less than 70 micrometers.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: April 26, 2011
    Assignee: Eastman Kodak Company
    Inventors: David W. Sandford, Thomas N. Blanton
  • Patent number: 7922940
    Abstract: This invention relates to the synthesis and isolation of colloidal silver particles through the use of thermomorphic polymers and the resulting composition. It further relates to the use of the resulting composition in the preparation of inks for printing with silver-containing inks.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: April 12, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Steven Dale Ittel
  • Publication number: 20100226838
    Abstract: The present invention relates to a process for the removal of metal catalyst degradation products from a bleed stream of a catalytic chemical reaction process, wherein the catalyst is based on a metal selected from those in group VIII of the periodic table, chromium, copper, molybdenum, tungsten, rhenium, vanadium, titanium and zirconium, said process comprising treatment of the bleed stream with an alkali metal carbonate or ammonium carbonate source to form a solid complex or an aqueous solution of said solid complex, and removal of the solid complex or the aqueous solution of said solid complex from the bleed stream.
    Type: Application
    Filed: May 28, 2008
    Publication date: September 9, 2010
    Inventors: Anand Kumar Bachasingh, Arie Van Zon
  • Patent number: 7790125
    Abstract: A fuel cell includes an anode, a cathode, and an electrolyte membrane arranged between the anode and the cathode. A fuel deficiency countermeasure is implemented for the anode and a fuel deficiency countermeasure is implemented for the cathode. As a result, the fuel cell suppresses a decline in performance caused by a fuel deficiency.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: September 7, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Manabu Kato
  • Patent number: 7749470
    Abstract: A method for processing waste copper liquid produces high copper content sludge, mainly by recycling a low copper content waste liquid from production of PCB in order to discharge a comparatively higher copper content sludge. First, the waste liquid is classified into an acidic low concentration copper waste liquid, an acidic high concentration copper waste liquid, and an oxidized acidic high concentration copper waste liquid. Then mix with a strong alkali to react and form a cupric oxide sludge that then undergoes dehydration and baking by applicable equipment to remove water and get a higher copper content sludge. It is therefore unnecessary to add other conversion agents to convert copper hydroxide into cupric oxide, thereby turning the valueless low copper content sludge from a waste liquid into a valuable recyclable high copper content sludge.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: July 6, 2010
    Assignee: Unitech Printed Circuit Board Corp.
    Inventor: Cheng-Hao Fu
  • Patent number: 7744834
    Abstract: A method for manufacturing metal nanoparticles, the method including forming a mixture by dissociating a metallic salt of a metal selected from the group consisting of Ag, Pd, Pt, Au and an alloy thereof as a metal precursor in fatty acid; and adding a metallic salt of a metal selected from the group consisting of Sn(NO3)2, Sn(CH3CO2)2, and Sn(acac)2 as a metallic catalyst into the mixture and mixing the mixture and the metallic salt. According to the method, metal nanoparticles have a uniform particle size distribution and a high yield by performing in a non-aqueous environment without using any organic solvent, and are environmentally friendly due to no use of a reducing agent.
    Type: Grant
    Filed: April 13, 2007
    Date of Patent: June 29, 2010
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Kwi-Jong Lee, Jae-Woo Joung, Byung-Ho Jun
  • Patent number: 7722841
    Abstract: The present invention is directed to the use of a combination of a polymeric chelant and coagulant to treat metal containing wastewater. More particularly, the invention is directed at removing copper from CMP wastewater. The composition includes a combination of (a) a polymeric chelant derived from a polyamine selected from the group consisting of diethylenetriamine (DETA), triethylenetetraamine (TETA), tertraethylenepentaamine (TEPA), poly[vinylamine], and branched or linear poly[ethylenimine] (PEI); and (b) a water soluble or dispersible copolymer of a tannin and a cationic monomer selected from the group consisting of methyl chloride or dimethyl sulfate quaternary salt of dimethyl aminoethyl acrylate, diethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminopropyl methacrylamide, dimethylaminopropyl acrylamide, and diallyl dimethyl ammonium chloride.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: May 25, 2010
    Assignee: General Electric Company
    Inventors: Baraka Kawawa, Stephen R. Vasconcellos, William Sean Carey, Nicholas R. Blandford
  • Patent number: 7615199
    Abstract: The invention relates to a method for the treatment of material containing at least one valuable metal and arsenic to form a valuable metal-depleted scorodite sediment and a pure aqueous solution to be discharged from the process. According to the method, the valuable metals are first removed from the material to be treated and then arsenic precipitation from the solution is performed in two stages. By means of the method, the aim is to obtain as low a valuable metal content as possible in the scorodite sediment that will be formed. Likewise, the arsenic and valuable metal content of the aqueous solution that is formed during arsenic precipitation also remains so low that the water can be released into the environment.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: November 10, 2009
    Assignee: Outotec Oyj
    Inventors: Jaakko Poijärvi, Raimo Nupponen, Tuula Mäkinen, Jaana Romppanen
  • Patent number: 7566437
    Abstract: The present invention relates to a method for manufacture of silver-based composite powders for electrical contact materials. The invention relates also to electrical contact materials made from such composite powders. The process comprises a high energy dispersing process of wet silver oxide (Ag2O) with additional second oxide components in aqueous suspension. The high energy dispersing process can be conducted by high shear mixing or by high energy milling. Preferably high speed dispersing units working at rotating speeds in the range of 5,000 to 30,000 rpm or high energy mills such as attritor mills are used. The new process is versatile, economical and offers access to a broad spectrum of contact materials. The silver-based composite powders made according to the new process yield contact materials with a highly dispersed microstructures and superior material characteristics.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: July 28, 2009
    Assignee: Umicore AG & Co. KG
    Inventors: Dan Goia, Bernd Kempf, Inge Fallheier, Roger Wolmer, Andreas Koffler
  • Patent number: 7534285
    Abstract: 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: Grant
    Filed: August 17, 2006
    Date of Patent: May 19, 2009
    Inventors: Gilles Fiset, Edmond St-Jean
  • Patent number: 7491372
    Abstract: A chemical process to leach copper concentrates in the presence of a concentrated solution of sulfates and chlorides. The process includes forming a high reactivity chemical paste containing a high concentration of ions in the liquid phase of the paste which react with copper ores and forms a series of soluble salts. The salts are extracted by a simple wash. Mixing equipment for handling high viscosity liquids is used. The total mixing time is about 5 minutes, after which the paste is poured into a rectangular mold, of several hundred meters per side, and is left to settle and breathe. During settling, water and sulfuric acid are added at intervals to replace that consumed by the reactions taking place during the aeration, until the reactions have virtually end. This treatment results in a dry, very resistant mass, containing the copper extracted in form of chlorine salts, and sulfate.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: February 17, 2009
    Assignee: Minera Michilla S.A.
    Inventors: Jamie Rauld Faine, Freddy Aroca Alfaro, Raúl Montealegre Jullian, Abraham Backit Gutierrez
  • Publication number: 20080241511
    Abstract: An aqueous precipitation process for the preparation of particles comprising primarily silver sulfate, comprising reacting an aqueous soluble silver salt and an aqueous soluble source of inorganic sulfate ion in an agitated precipitation reactor vessel and precipitating particles comprising primarily silver sulfate, wherein the reaction and precipitation are performed in the presence of an aqueous soluble inorganic additive compound containing a cation capable of forming a sulfate salt that is less soluble than silver sulfate or a halide anion or an oxyanion capable of forming a silver salt that is less soluble than silver sulfate, the amount of additive being a minor molar percentage, relative to the molar amount of silver sulfate precipitated, and effective to result in precipitation of particles comprising primarily silver sulfate having a mean grain-size of less than 70 micrometers.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 2, 2008
    Inventors: David W. Sandford, Thomas N. Blanton
  • Patent number: 7291292
    Abstract: This invention relates to the synthesis and isolation of colloidal silver particles through the use of thermomorphic polymers and the resulting composition. It further relates to the use of the resulting composition in the preparation of inks for printing with silver-containing inks.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: November 6, 2007
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Steven Dale Ittel
  • Patent number: 7226573
    Abstract: A silver oxide powder that replaces silver powder as a silver conductive paste filler has a specific surface area measured by the BET method is 1.0–25.0 m2/g, average primary particle diameter is 1–50 nm, and average secondary particle diameter is 1–1000 nm. The silver oxide powder is made by preparing a neutralization medium that is an aqueous solution containing one or both of sodium hydroxide and potassium hydroxide in a total amount of 0.5 mole/L or less, simultaneously adding an aqueous solution containing silver salt in an amount of 6.0 mole/L or less and an aqueous solution of at least one of sodium hydroxide and potassium hydroxide to the liquid medium to conduct a neutralization reaction, thereby obtaining a neutralized precipitate, maintaining the liquid at a pH in the range of 12±1.5 during the reaction, and subjecting the precipitate to filtration, washing, and drying.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: June 5, 2007
    Assignee: Dowa Mining Co., Ltd.
    Inventors: Kenichi Harigae, Yoshiyuki Shoji
  • Patent number: 7214644
    Abstract: A method for producing a copper/palladium colloid catalyst useful for Suzuki couplings.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: May 8, 2007
    Assignee: Xerox Corporation
    Inventors: Jennifer A. Coggan, Nan-Xing Hu, H. Bruce Goodbrand, Timothy P. Bender
  • Patent number: 7201888
    Abstract: The present invention provides silver oxide particles having an average diameter of less than or equal to 100 nm that are stable and can be transported in dry powder form. The surface of the silver oxide particles is coated with an extremely thin layer of a surfactant such as fatty acid. Nanosized silver oxide particles according to the invention are preferably formed via the addition of a strong base to a mixture including an aqueous silver salt solution and a surfactant dissolved in an organic solvent that is at least partially water miscible. The strong base causes silver oxide to precipitate from the mixture as nanosized particles, which are immediately encapsulated by the surfactant and thus protected from further crystal growth and Ostwald ripening. The nanosized surfactant coated particles of silver oxide can be washed and dried and then transported in dry form.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: April 10, 2007
    Assignee: Ferro Corporation
    Inventors: Gregory M. Berube, Gargi Banerjee
  • Patent number: 7141227
    Abstract: This invention provides a method for preparing cerium oxide nanoparticles with a narrow size distribution. The cerium oxide nanoparticles obtained by the method of the invention are nearly all crystalline. The method comprises providing a first aqueous solution comprising cerium nitrate and providing a second aqueous solution comprising hexamethylenetetramine. The first and second aqueous solutions are mixed to form a mixture, and the mixture is maintained at a temperature no higher than about 320° K to form nanoparticles. The nanoparticles that are formed are then separated from the mixture. A further aspect of the present invention is an apparatus for preparing cerium oxide nanoparticles. The apparatus comprises a mixing vessel having a first compartment for holding a first aqueous solution comprising cerium nitrate and a second compartment for holding a second aqueous solution comprising hexamethylenetetramine. The mixing vessel has a retractable partition separating the first and second compartments.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: November 28, 2006
    Assignee: The Trustees of Columbia University in the City of New York
    Inventor: Siu-Wai Chan
  • Patent number: 7132093
    Abstract: The oxide materials are of the class of ternary mesoporous mixed oxide materials including lanthanum, a metal M selected from the group consisting of Cr, Mn, Fe, Co, Ni, Cu and Zn, and zirconium or cerium such a mesoporous La—Co—Zr mixed oxide material designated as Meso LCZ[x] where x is the atomic ratio (La+Co)/La+Co+Zr. They are useful as catalysts since they show high activities for hydrocarbon oxidation and good resistance against poisoning agents. These highly ordered mesoporous mixed oxides are synthesized by: preparing an amorphous solution of a La-M precursor and adding a salt of zirconium or cerium thereto; acidifying the amorphous solution in the presence of a surfactant under conditions to obtain a clear homogeneous solution; adjusting pH of the solution under conditions to form a solid precipitate; separating the solution and surfactant from the precipitate; and calcinating the precipitate.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: November 7, 2006
    Assignee: Université Laval
    Inventors: Serge Kaliaguine, Trong On Do
  • Publication number: 20040258590
    Abstract: Copper is extracted from aqueous copper leach solutions wherein the leach solutions have a temperature of at least 30° C.
    Type: Application
    Filed: April 22, 2004
    Publication date: December 23, 2004
    Inventors: Gary A. Kordosky, R. Brantley Sudderth, Michael J. Virnig
  • Publication number: 20040151644
    Abstract: The invention provides a method of recovering a copper component or a manganese component from a cleaning agent containing copper oxide, a cleaning agent containing basic copper carbonate, a cleaning agent containing copper hydroxide, or a cleaning agent containing copper oxide and manganese oxide, the cleaning agents having been used for removing, through contact with a harmful gas, a phosphine contained as a harmful component in the harmful gas. Also, the invention provides a method of recovering a copper component or a manganese component from a cleaning agent containing basic copper carbonate, a cleaning agent containing copper hydroxide, or a cleaning agent containing copper oxide and manganese oxide, the cleaning agents having been used for removing, through contact with a harmful gas, a phosphine contained as a harmful component in the harmful gas.
    Type: Application
    Filed: February 2, 2004
    Publication date: August 5, 2004
    Inventors: Kenji Otsuka, Takashi Shimada, Minoru Osugi, Kei Kawaguchi
  • Patent number: 6649131
    Abstract: A method for recycling copper oxide includes: a first step in which a sodium hydroxide aqueous solution is added to acidic copper chloride waste etchant produced in the PCB industry, to obtain copper hydroxide slurry; and a second step in which the slurry obtained in the first step is heated and sintered to thereby prepare a needle-form copper oxide. Since copper oxide has a purity of more than 99.0 wt % and the needle-form crystal morphology, so that it has an excellent filtering ability and homogeneous particle size distribution.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: November 18, 2003
    Assignee: Myung Jin Chemical Co., Ltd.
    Inventors: Kyu Bum Seo, Young Sun Uh, Young Hee Kim, Jung Yoon Han, Sun Jin Kim, Myung Hun Kim
  • Publication number: 20030138366
    Abstract: In a method of recovering copper from an industrial waste sludge or liquid, a first treatment agent and/or a second treatment agent is added into a waste feed to separate the coagulants therefrom. A bluish solution and a tail gas are thereby obtained. Alternatively, an acidic etching waste solution is added instead of the first treatment agent and/or the second treatment agent into the waste feed. Then, a converting agent/converting aid agent is added in the bluish solution. Thereafter, the solution is filtrated to obtain a solid copper oxide, a filtrate and a tail oxidizing gas. The filtrate is saturated by the aforementioned gases and fed back to the waste feed. The copper oxide thereby obtained has a high copper content compared to the conventional methods. All of the other resulting products are recycled without being disposed of in the environment.
    Type: Application
    Filed: January 13, 2003
    Publication date: July 24, 2003
    Inventor: Chih Cheng Wang
  • Patent number: 6596246
    Abstract: Stable copper hydroxide is prepared by removing ferrous ion from the beginning cupric solution. The ferrous ion is oxidized to ferric ion, and the ferric ion is precipitated by raising the pH of the solution to 3-4. The utilization of phosphate ion both increases the efficiency of oxidation and simultaneously precipitates ferric ion. A second raising the pH of the purified solution precipitates highly pure copper hydroxide that can be harvested.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: July 22, 2003
    Assignee: Dermet SA de CV
    Inventors: Julio Huato, Tetsuya Ogura
  • Publication number: 20030124744
    Abstract: Methods for detecting gold and quantitating gold in ore samples utilizing a gold-specific protein are provided, including methods for multiple sample handling. Also provided are methods for extracting gold from mineral suspensions utilizing a magnetic mineral binding reagent and gold-specific protein, or hydrophobic reagent and gold-specific protein in conjunction with a flotation reagent.
    Type: Application
    Filed: August 8, 2001
    Publication date: July 3, 2003
    Inventors: Clement E. Furlong, Scott Jorgenson-Soelberg, James B. Clendenning, Noel W. Kirshenbaum, Victor Chevillon, Peter Leon Kowalczyk
  • Patent number: 6516633
    Abstract: The present invention is directed to microemulsion techniques for rapidly preparing photochromic glass nanoparticles and to the photochromic glass nanoparticles so prepared. More particularly, the method of the invention comprises the combination of two microemulsions, one containing a water-soluble silver salt and a glass precursor and the other containing a halide salt and an initiator for glass formation, which process rapidly yields silver halide particles. This invention gives nanometer-sized silver halide particles embedded in glass, thus providing photochromic glass nanoparticles without further annealing, or at most mild annealing. These nanoparticles are valuable as added components to any macro-material that one might wish to have photochromic properties. The particles would impart photochromism while not affecting the physical properties of the material.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: February 11, 2003
    Assignee: Nano-Tex, LLC
    Inventors: Lael L. Erskine, Dan B. Millward, David S. Soane
  • Patent number: 6485696
    Abstract: Ozone is used to rapidly oxidize specific metallic elements. The insoluble oxidized compounds of the metals formed by the ozonation are then recovered for industrial use in a conventional sedimentation/filtration tank or pool. There is no requirement for pre-treating or neutralizing the acid mine discharge, even when iron is the dominant metal. If the pH of the untreated acid mine discharge is less than about 2.5, metals other than iron precipitated first. After that, the pH is raised and the iron is precipitated as ferric hydroxide. Aluminum is removed as hydrated aluminum compounds after removal of the iron prior to discharging the acid mine discharge to streams. Both the ozonation and neutralization processes are monitored and controlled using electrochemical sensors and feedback controllers.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: November 26, 2002
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Motoaki Sato, Eleanora I. Robbins
  • Patent number: 6436358
    Abstract: A method and apparatus for removing metal contaminants from the spent salt of a molten salt oxidation (MSO) reactor is described. Spent salt is removed from the reactor and analyzed to determine the contaminants present and the carbonate concentration. The salt is dissolved in water, and one or more reagents may be added to precipitate the metal oxide and/or the metal as either metal oxide, metal hydroxide, or as a salt. The precipitated materials are filtered, dried and packaged for disposal as waste or can be immobilized as ceramic pellets. More than about 90% of the metals and mineral residues (ashes) present are removed by filtration. After filtration, salt solutions having a carbonate concentration >20% can be spray-dried and returned to the reactor for re-use. Salt solutions containing a carbonate concentration <20% require further clean-up using an ion exchange column, which yields salt solutions that contain less than 1.0 ppm of contaminants.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: August 20, 2002
    Assignee: The Regents of the University of California
    Inventors: Peter C. Hsu, Erica H. Von Holtz, David L. Hipple, Leslie J. Summers, William A. Brummond, Martyn G. Adamson
  • Patent number: 6352675
    Abstract: The present invention provides both reagents and a process for removing heavy metals from a caustic fluid stream by the addition of reagents which are not corrosive or deleterious. Specifically, the present invention is directed to removing heavy metals from a Bayer liquor in an aluminum processing plant. The reagents, dithiocarbamate and dithocarbonate groups, are added individually or in combination thereof to the Bayer liquor for the removal of heavy metals, such as zinc. The reagents form a complex with the heavy metal for the precipitation of the metal from the fluid stream. Once a complex is formed, the Bayer liquor is held in a quiescent state for a period of time sufficient for settling out of solution the precipitate. After settling out of solution, the precipitate is separated and removed and the Bayer liquor is then further processed into alumina.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: March 5, 2002
    Assignee: Nalco Chemical Company
    Inventor: John T. Malito
  • Patent number: 6342189
    Abstract: A method for the total precipitation of valuable metals, such as copper, nickel, zinc, cobalt, etc., from a leaching solution that has been acidified with sulphuric acid and that is substantially free from impurities, by neutralizing the solution with lime and/or limestone. Neutralization is effected in at least two stages, wherewith only partial precipitation is effected in the first stage, and wherewith full precipitation of remaining valuable metal content is effected in the last stage, by adding a surplus of neutralization agent. Slurry containing precipitates and remaining solid neutralization agent formed in the last stage in the neutralization process is returned to the first neutralization stage, possibly after re-dissolving the slurry in the incoming acid leaching solution. The amount of slurry returned together with any further neutralizing agent added promotes the partial precipitation of the valuable metal content.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: January 29, 2002
    Assignee: Boliden Mineral, AB
    Inventor: Jan-Eric Sundkvist
  • Patent number: 6337056
    Abstract: A process for refining noble metals from auriferous mines, wherein the auriferous material is first milled and treated with a cyanide solution, and comprising: a step for the pretreatment of the auriferous material, wherein the complexes of cyanide with noble metals are fixed on anionic resins and then incinerated; a predefining step, which comprises an etching of the materials incinerated during the pretreatment with a hydrochloric-nitric solution; and specific steps for refining the gold, palladium, platinum and silver.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: January 8, 2002
    Inventor: Riccardo Reverso
  • Patent number: 6274104
    Abstract: The invention relates to a method for recovering non-ferrous metals, particularly nickel, cobalt, copper, zinc, manganese and magnesium, from materials containing said metals by converting said non-ferrous metals into sulphates by means of melt and melt coating sulphation, i.e. by a thermal treatment under oxidizing conditions within a temperature range of 400 to 800° C., during which a reaction mixture is formed containing at least one said non-ferrous metal, iron(III)sulphate and alkali metal sulphate, and appropriate reaction conditions are selected to substantially prevent iron(III)sulphate from thermally decomposing to hematite, and finally, said non-ferrous metals are recovered as metallic compounds. In the method of the invention, a process is formed around the melt and melt coating sulphation, which comprises nine steps.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: August 14, 2001
    Inventors: Jussi Rastas, Pekka Saikkonen