Group Iva Metal (ge, Sn, Or Pb) Patents (Class 423/89)
  • Patent number: 10399148
    Abstract: The present invention relates to a method for preparing a phase-separated lead telluride-lead sulfide nanopowder using solution synthesis and a phase-separated lead telluride-lead sulfide nanopowder prepared by the method. The method includes: (a) mixing tellurium and a first solvent, followed by ultrasonic irradiation to prepare a tellurium precursor solution; (b) mixing an organosulfur compound and a second solvent, followed by ultrasonic irradiation to prepare a sulfur precursor solution; (c) mixing lead oxide, a third solvent, and a fourth solvent and heating the mixture to prepare a lead precursor solution; (d) adding the tellurium precursor solution to the lead precursor solution and allowing the mixture to react; (e) adding the sulfur precursor solution to the reaction mixture of step (d) and allowing the resulting mixture to react; and (f) cooling the reaction mixture of step (e) to room temperature to prepare a phase-separated lead telluride-lead sulfide nanopowder.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: September 3, 2019
    Assignee: Korea University Research and Business Foundation
    Inventors: Yun-Mo Sung, Ki-Hyun Cho
  • Patent number: 8968698
    Abstract: 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: Grant
    Filed: November 7, 2012
    Date of Patent: March 3, 2015
    Assignee: Cytec Technology Corp.
    Inventors: Troy Allan Bednarski, Violina Antoneta Cocalia, Matthew Dean Soderstrom, Eduardo Alberto Kamenetzky, Andrew Michael Cameron, Douglas Harris
  • Patent number: 8883097
    Abstract: A method of treating value bearing material comprising oxidized or surface oxidized mineral values includes the steps of crushing the value bearing material, contacting the crushed material! with a sulfide solution to sulfide the oxidized or surface oxidized mineral values, and adding ions of a selected base metal to the crushed value bearing material. The value bearing material may comprise oxidized or surface oxidized base metal or precious metal minerals. The crushed value bearing material is prepared as a slurry or pulp comprising from 15% to 40% solids and the remainder comprising water. The sulfide solution preferably comprises a soluble sulfidiser such as sodium hydrosulfide and the base-metal ion solution preferably comprises metal salt of base metals like copper or iron.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: November 11, 2014
    Assignee: University of Cape Town
    Inventors: Deidre Jane Bradshaw, Andrew James Haigh Newell
  • Patent number: 8753590
    Abstract: A solid composition comprises: MnO2; and a compound represented by the general formula (I) wherein: R is a polymer; each Y is independently a hydrogen or a negative charge; Z is either hydrogen or is not present; each n is independently 1, 2, 3, 4, 5 or 6; wherein the MnO2 is bound to the compound of formula (I) so as to coat the surface thereof. Such a composition may be used for the separation of polyvalent metal species, such as Mo, from one or more accompanying impurities.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: June 17, 2014
    Assignee: Mallinckrodt LLC
    Inventor: Luis Antonio Miguel Marques Barbosa
  • Publication number: 20140127094
    Abstract: A process is provided for stabilizing a sulfate and/or sulfide-rich waste material, comprising metal sulfide minerals, and sequestering CO2 comprises exposing the material to a CO2-enriched gas mixture, reacting the CO2-enriched gas mixture with the metal sulfide minerals and forming a CO2-depleted gas mixture and a carbon-containing compound and at least one product selected from the group consisting of a purified metal or a metal-rich compound suitable for smelting or refining, sulfuric acid, sulfur and sulfurous acid, and system and apparatus therefor.
    Type: Application
    Filed: November 4, 2013
    Publication date: May 8, 2014
    Applicant: Strategic Metals Ltd.
    Inventor: William Douglas Eaton
  • Patent number: 8715615
    Abstract: The invention relates to the low temperature recovery of lead oxide (PbO) from lead acid battery paste through the preparation of lead carboxylate from the battery paste and the conversion of the lead carboxylate to PbO.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: May 6, 2014
    Assignee: Retriev Technologies Incorporated
    Inventors: W. Novis Smith, Steven A. Kinsbursky
  • Publication number: 20140023574
    Abstract: The invention relates to the low temperature recovery of lead oxide (PbO) from lead acid battery paste through the preparation of lead carboxylate from the battery paste and the conversion of the lead carboxylate to PbO.
    Type: Application
    Filed: July 6, 2011
    Publication date: January 23, 2014
    Inventors: W. Novis Smith, Steven A. Kinsbursky
  • Patent number: 8603418
    Abstract: Methods of preparing stannous oxide including neutralizing a solution of divalent tin ions in a mineral acid using a weak base, followed by heating the neutralized solution optionally under an inert atmosphere are provided. The stannous oxide particles produced are readily soluble in alkyl sulfonic acids.
    Type: Grant
    Filed: September 30, 2012
    Date of Patent: December 10, 2013
    Assignee: Dow Global Technologies LLC
    Inventor: Matthew Grandbois
  • Patent number: 8563622
    Abstract: The present application relates to novel monodisperse, gel-type or macroporous picolylamine resins which are based on at least one monovinylaromatic compound and at least one polyvinylaromatic compound and/or a (meth)acrylic compound and contain tertiary nitrogen atoms in structures of the general formula (I) as functional group, where R1 is an optionally substituted radical from the group consisting of picolyl, methylquinoline and methylpiperidine, R2 is a radical —(CH2)q—COOR3, R3 is a radical from the group consisting of H, Na and K, m is an integer from 1 to 4, n and p are each, independently of one another, a number in the range from 0.1 to 1.9 and the sum of n and p is 2, q is an integer from 1 to 5 and M is the polymer matrix, a process for preparing them and their uses, in particular the use in hydrometallurgy and electroplating.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: October 22, 2013
    Assignee: LANXESS Deutschland GmbH
    Inventors: Michael Schelhaas, Reinhold Klipper, Duilio Rossoni
  • Patent number: 8562922
    Abstract: The present application relates to novel gel-type or macroporous picolylamine resins which are based on at least one monovinylaromatic compound and at least one polyvinylaromatic compound and/or a (meth)acrylic compound and contain tertiary nitrogen atoms in structures of the general formula (I) as functional group, where R1 is an optionally substituted radical from the group consisting of picolyl, methylquinoline and methylpiperidine, R2 is —CH2—S—CH2COOR3 or —CH2—S—C1-C4-alkyl or —CH2—S—CH2CH(NH2)COOR3 or —CH2—S—CH2—CH(OH)—CH2(OH) or or derivatives thereof or —C?S(NH2), R3 is a radical from the group consisting of H, Na and K, m is an integer from 1 to 4, n and p are each, independently of one another, a number in the range from 0.1 to 1.9 and the sum of n and p is 2 and M is the polymer matrix, a process for preparing them and their uses, in particular the use in hydrometallurgy and electroplating.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: October 22, 2013
    Assignee: LANXESS Deutschland GmbH
    Inventors: Reinhold Klipper, Michael Schelhaas, Duilio Rossoni
  • Publication number: 20130209336
    Abstract: This invention relates to a method for the selective recovery of manganese and zinc from brines that includes the steps of contacting a brine with an ionic liquid in order to selectively extract manganese and zinc from the brine into the ionic liquid; and treating the ionic liquid containing extracted manganese and zinc with an aqueous solution to selectively precipitate manganese, producing a manganese depleted, zinc rich ionic liquid. The method can further include the steps of treating the manganese depleted, zinc rich ionic liquid with an aqueous solution to selectively precipitate zinc.
    Type: Application
    Filed: March 14, 2013
    Publication date: August 15, 2013
    Applicant: SIMBOL INC.
    Inventor: SIMBOL INC.
  • Patent number: 8366826
    Abstract: The present invention relates to a method of preparing silicon germanium alloy nanocrystals by the simultaneous thermal disproportionation of a siliceous material and GeX2 in a conventional tube furnace. Also included is a method of preparing free standing silicon germanium nanocrystals by the acid etching product of the product of the thermal disproportionation of a siliceous material and GeX2.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: February 5, 2013
    Assignee: The Governors of the University of Alberta
    Inventors: Jonathan Gordon Conn Veinot, Eric James Henderson
  • Patent number: 8343446
    Abstract: The oxine ligands 5-chloro-8-hydroxyquiniline and 5-sulfoxyl-8-hydroxyquinoline are covalently bound, using, for example, the Mannich reaction, to a silica gel polyamine composite made from a silanized amorphous silica xerogel and polyallylamine. The resulting modified composites, termed CB-1 (X?Cl) and SB-1 (X?SO3H), respectively, show a clear selectivity for trivalent over divalent ions and selectivity for gallium over aluminum. The compounds of the invention can be applied for the sequestration of metals, such as heavy metals, from contaminated mine tailing leachates.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: January 1, 2013
    Assignee: The University of Montana
    Inventors: Edward Rosenberg, Paul Miranda, Yuen Onn Wong
  • Patent number: 8323595
    Abstract: There is provided a process for recovering high purity litharge PbO from spent lead acid battery paste at low temperatures and the further preparation of highly pure lead oxides and Pb(OH)2.
    Type: Grant
    Filed: September 3, 2011
    Date of Patent: December 4, 2012
    Assignee: Toxco, Inc.
    Inventors: W. Novis Smith, Steven A. Kinsbursky
  • Patent number: 8318113
    Abstract: A solid composition comprises: —MnO2; and—a compound represented by the general formula (I) wherein: R is a polymer; each Y is independently a hydrogen or a negative charge; Z is either hydrogen or is not present; each n is independently 1, 2, 3, 4, 5 or 6; wherein the MnO2 is bound to the compound of formula (I) so as to coat the surface thereof. Such a composition may be used for the separation of polyvalent metal species, such as Mo, from one or more accompanying impurities.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: November 27, 2012
    Assignee: Mallinckrodt LLC
    Inventor: Luis Antonio Miguel Marques Barbosa
  • Patent number: 8313714
    Abstract: Embodiments of the invention provide a method of making non-spherical nanoparticles that includes (a) combining a source of a Group 12, 13, 14, or 15 metal or metalloid; a source of a Group 15 or 16 element; and a source of a quaternary ammonium compound or phosphonium compound; and (b) isolating non-spherical nanoparticles from the resulting reaction mixture. Other embodiments of the invention provide non-spherical nanoparticle compositions, that are the reaction product of a source of a Group 12, 13, 14, or 15 metal or metalloid; a source of a Group 15 or 16 element; and a source of a quaternary ammonium compound or phosphonium compound; wherein nanoparticle tetrapods comprise 75-100 number percent of the nanoparticle products.
    Type: Grant
    Filed: April 11, 2008
    Date of Patent: November 20, 2012
    Assignee: William Marsh Rice University
    Inventors: Subashini Asokan, Michael Sha-nang Wong
  • Patent number: 8263029
    Abstract: The invention provides a simple and cost-effective method for preparing particles such as anisotropic semiconductor nanoparticles (e.g. CdS) and devices thereof. The method comprises (i) dispersing at least part of particle-forming reactants in a self-organized medium such as surfactant-aqueous solution system, and (ii) conducting a particle-forming reaction using the particle-forming reactants dispersed in the self-organized medium under shear condition to form the particles. The anisotropic property of the particles is controlled at least partially by the shear condition. The invention may be used to prepare quantum dots in a liquid crystal, and various devices such as nonlinear optics, optoelectronic devices, and solar cells, among others.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: September 11, 2012
    Assignee: Kent State University
    Inventors: Antal Jakli, Stefanie Taushanoff, Mátyás Molnár, Attila Bóta, Erika Kalman, Peter Palinkás, legal representative, Andrea Palinkás, legal representative, Zoltan Varga
  • Patent number: 8221709
    Abstract: Disclosed are compositions and methods for separating gangue material from metallic sulfide ores. The compositions typically include a lignosolfonate and do not include a cyanide salt. Suitable lignosulfonates may include lignosulfonates, for example hardwood lignosulfonate having a weight average molecular weight of about 3 kDa to about 12 kDa and having a relatively low sulfur content and a relatively low sulfonate content.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: July 17, 2012
    Assignee: LignoTech USA, Inc.
    Inventors: Jerry D. Gargulak, Lori L. Bushar
  • Patent number: 8178477
    Abstract: Proppants which can be used to prop open subterranean formation fractions are described. Proppant formulations which use one or more proppants of the present invention are described, as well as methods to prop open subterranean formation fractions, and other uses for the proppants and methods of making the proppants.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: May 15, 2012
    Assignee: Oxane Materials, Inc.
    Inventors: Robert D. Skala, John R. Loscutova, Christopher E. Coker
  • Patent number: 8012336
    Abstract: Proposed is a method for collecting valuable metal from an ITO scrap in which a mixture of indium hydroxide and tin hydroxide or metastannic acid is collected by subjecting the ITO scrap to electrolysis in pH-adjusted electrolyte, and roasting this mixture as needed to collect the result as a mixture of indium oxide and tin oxide. This method enables the efficient collection of indium hydroxide and tin hydroxide or metastannic acid, or indium oxide and tin oxide from an ITO scrap of an indium-tin oxide (ITO) sputtering target or an ITO scrap such as ITO mill ends arisen during the manufacture of such ITO sputtering target.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: September 6, 2011
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Yuichiro Shindo, Kouichi Takemoto
  • Patent number: 8012335
    Abstract: Proposed is a method for collecting valuable metal from an ITO scrap including a step of collecting tin by subjecting the ITO scrap to electrolysis. Further proposed is a method for collecting valuable metal from an ITO scrap including the steps of providing an ITO electrolytic bath and a tin collecting bath, dissolving the ITO scrap in the electrolytic bath, and thereafter collecting tin in the tin collecting bath. Additionally proposed is a method for collecting valuable metal from an ITO scrap including the steps of dissolving the ITO scrap by subjecting it to electrolysis as an anode in electrolyte, precipitating only tin contained in the solution as tin itself or a substance containing tin, extracting the precipitate, placing it in a collecting bath, re-dissolving this to obtain a solution of tin hydroxide, and performing electrolysis or neutralization thereto in order to collect tin.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: September 6, 2011
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Yuichiro Shindo, Kouichi Takemoto
  • Patent number: 8007652
    Abstract: Proposed is a method for collecting valuable metal from an ITO scrap including the steps of subjecting the ITO scrap to electrolysis and collecting the result as indium-tin alloy. Additionally provided is a method for collecting valuable metal from an ITO scrap including the steps of providing an ITO electrolytic bath and an indium-tin alloy collecting bath, dissolving the ITO in the electrolytic bath, and thereafter collecting indium-tin alloy in the indium-tin alloy collecting bath. These methods enable the efficient collection of indium-tin alloy from an ITO scrap of an indium-tin oxide (ITO) sputtering target or an ITO scrap such as ITO mill ends arisen during the manufacture of such ITO sputtering target.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: August 30, 2011
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Yuichiro Shindo, Kouichi Takemoto
  • Patent number: 8003065
    Abstract: Proposed is a method for collecting valuable metal from an ITO scrap including the steps of subjecting the ITO scrap to electrolysis in pH-adjusted electrolyte, and collecting indium or tin as oxides. Additionally proposed is a method for collecting valuable metal from an ITO scrap including the steps of subjecting the ITO scrap to electrolysis in an electrolytic bath partitioned with a diaphragm or an ion-exchange membrane to precipitate hydroxide of tin, thereafter extracting anolyte temporarily, and precipitating and collecting indium contained in the anolyte as hydroxide. With the methods for collecting valuable metal from an ITO scrap described above, indium or tin may be collected as oxides by roasting the precipitate containing indium or tin. Consequently, provided is a method for efficiently collecting indium from an ITO scrap of an indium-tin oxide (ITO) sputtering target or an ITO scrap such as ITO mill ends arisen during the manufacture of such ITO sputtering target.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: August 23, 2011
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Yuichiro Shindo, Kouichi Takemoto
  • Publication number: 20110091365
    Abstract: The present application relates to novel gel-type or macroporous picolylamine resins which are based on at least one monovinylaromatic compound and at least one polyvinylaromatic compound and/or a (meth)acrylic compound and contain tertiary nitrogen atoms in structures of the general formula (I) as functional group, where R1 is an optionally substituted radical from the group consisting of picolyl, methylquinoline and methylpiperidine, R2 is —CH2—S—CH2COOR3 or —CH2—S—C1-C4-alkyl or —CH2—S—CH2CH(NH2)COOR3 or —CH2—S—CH2—CH(OH)—CH2(OH) or or derivatives thereof or —C?S(NH2), R3 is a radical from the group consisting of H, Na and K, m is an integer from 1 to 4, n and p are each, independently of one another, a number in the range from 0.1 to 1.9 and the sum of n and p is 2 and M is the polymer matrix, a process for preparing them and their uses, in particular the use in hydrometallurgy and electroplating.
    Type: Application
    Filed: February 27, 2009
    Publication date: April 21, 2011
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Reinhold Klipper, Michael Schelhaas, Duilio Rossoni
  • Publication number: 20100316544
    Abstract: Proposed is a method for collecting valuable metal from an ITO scrap including the steps of subjecting the ITO scrap to electrolysis in pH-adjusted electrolyte, and collecting indium or tin as oxides. Additionally proposed is a method for collecting valuable metal from an ITO scrap including the steps of subjecting the ITO scrap to electrolysis in an electrolytic bath partitioned with a diaphragm or an ion-exchange membrane to precipitate hydroxide of tin, thereafter extracting anolyte temporarily, and precipitating and collecting indium contained in the anolyte as hydroxide. With the methods for collecting valuable metal from an ITO scrap described above, indium or tin may be collected as oxides by roasting the precipitate containing indium or tin. Consequently, provided is a method for efficiently collecting indium from an ITO scrap of an indium-tin oxide (ITO) sputtering target or an ITO scrap such as ITO mill ends arisen during the manufacture of such ITO sputtering target.
    Type: Application
    Filed: June 27, 2007
    Publication date: December 16, 2010
    Applicant: NIPPON MINING & METALS CO., LTD.
    Inventors: Yuichiro Shindo, Kouichi Takemoto
  • Patent number: 7851402
    Abstract: The invention relates to soluble metal oxides and mixed metal oxides and to solutions comprising metal oxides and mixed metal oxides. The invention further relates to a process for preparing a soluble metal oxide and a soluble mixed metal oxide and additionally relates to a process for modifying the solubility of a soluble metal oxide. The metal oxides, mixed metal oxides and solutions thereof have a number of applications and in particular are suitable for use as catalysts and also as precursors for the formation of metal films.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: December 14, 2010
    Assignee: National University of Ireland, Galway
    Inventors: Patrick Desmond Cunningham, James McManus
  • Patent number: 7807058
    Abstract: Toxic substances such as heavy metals are extracted from a medium using a sorbent composition. The sorbent composition is derived by sulfidation of red mud, which contains hydrated ferric oxides derived from the Bayer processing of bauxite ores. Exemplary sulfidizing compounds are H2S, Na2S, K2S, (NH4)2S, and CaSx. The sulfur content typically is from about 0.2 to about 10% above the residual sulfur in the red mud. Sulfidized red mud is an improved sorbent compared to red mud for most of the heavy metals tested (Hg, Cr, Pb, Cu, Zn, Cd, Se, Th, and U). Unlike red mud, sulfidized red mud does not leach naturally contained metals. Sulfidized red mud also prevents leaching of metals when mixed with red mud. Mixtures of sulfidized red mud and red mud are more effective for sorbing other ions, such as As, Co, Mn, and Sr, than sulfidized red mud alone.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: October 5, 2010
    Assignee: J.I. Enterprises, Inc.
    Inventor: Joseph Iannicelli
  • Patent number: 7799226
    Abstract: A process for separation of no-carrier-added thallium radionuclide from no-carrier-added lead and mercury comprising providing a solution of no-carrier-added thallium radionuclide and no-carrier-added lead and mercury to dialysis. By this method separation of 199Tl radionuclides has also been achieved in presence of macro quantity of inactive thallium, which is as high as 10 mM. The method is capable of being used in Medical industry, diagnosis of cardiac diseases by 201Tl or 199Tl and all other industries where trace amount of thallium separation is required from mercury and lead.
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: September 21, 2010
    Assignee: Saha Institute of Nuclear Physics
    Inventors: Susanta Lahiri, Samir Kumar Maji, Dalia Nayak
  • Patent number: 7785561
    Abstract: A process for producing high purity lead oxide from impure lead compounds particularly from waste lead battery paste which includes an oxidation-reduction step. The process results in a reduction of impure lead compounds to the +2 valence state and metal particle contaminants are oxidized to the +2 state.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: August 31, 2010
    Assignees: Toxco. Inc, Kinsbursky Brothers, Inc.
    Inventors: W. Novis Smith, Steven A. Kinsbursky
  • Publication number: 20100215556
    Abstract: A nanopore reactive adsorbent composite material, which may be a porous adsorbent comprising a chemically surface face modified gel, has a composition and micro structure, which integrals ion exchange components such as hydroxy apatite.
    Type: Application
    Filed: October 31, 2007
    Publication date: August 26, 2010
    Applicant: INDUSTRIAL SCIENCE & TECHNOLOGY NETWORK INC.
    Inventors: Roman Domszy, Yun Han Lee
  • Patent number: 7763566
    Abstract: Toxic substances such as heavy metals are extracted from a medium using a sorbent composition. The composition is derived by sulfidation of red mud, which contains hydrated ferric oxides derived from the Bayer processing of bauxite ores. Exemplary sulfidizing compounds are H2S, Na2S, K2S, (NH4)2S, and CaSx. The sulfur content typically is from about 0.2 to about 10% above the residual sulfur in the red mud. Sulfidized red mud is an improved sorbent compared to red mud for most of the heavy metals tested (Hg, Cr, Pb, Cu, Zn, Cd, Se, Th, and U). Unlike red mud, sulfidized red mud does not leach naturally contained metals. Sulfidized red mud also prevents leaching of metals when mixed with red mud. Mixtures of sulfidized red mud and red mud are more effective for sorbing other ions, such as As, Co, Mn, and Sr, than sulfidized red mud alone.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: July 27, 2010
    Assignee: J.I. Enterprises, Inc.
    Inventor: Joseph Iannicelli
  • Patent number: 7736547
    Abstract: A method of producing a proton conducting material, comprising adding a pyrophosphate salt to a solvent to produce a dissolved pyrophosphate salt; adding an inorganic acid salt to a solvent to produce a dissolved inorganic acid salt; adding the dissolved inorganic acid salt to the dissolved pyrophosphate salt to produce a mixture; substantially evaporating the solvent from the mixture to produce a precipitate; and calcining the precipitate at a temperature of from about 400° C. to about 1200° C.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: June 15, 2010
    Assignee: Los Alamos National Security, LLC
    Inventors: Fernando Henry Garzon, Melinda Lou Einsla, Rangachary Mukundan
  • Publication number: 20100143219
    Abstract: Provided is a process for producing fine particles of pure lead oxide from a waste lead oxide paste obtained from exhausted lead-acid batteries. The lead oxide particles so produced are substantially spherical and have a weight average particle size from about 13 nm to about 100 nm, which, are of nano-particle dimensions. The process according to the present invention is capable to produce pure lead oxide of PbO2 and lead oxide of Pb3O4 or commonly known as red lead.
    Type: Application
    Filed: January 3, 2008
    Publication date: June 10, 2010
    Applicant: TAI-KWONG-YOKOHAMA BATTERY INDUSTRIED SDN BHD
    Inventor: Siew Hon Chow
  • Patent number: 7682593
    Abstract: The invention relates to the manufacture of high purity germanium for the manufacture of e.g. infra red optics, radiation detectors and electronic devices. GeCl4 is converted to Ge metal by contacting gaseous GeCl4 with a liquid metal M containing one of Zn, Na and Mg, thereby obtaining a Ge-bearing alloy and a metal M chloride, which is removed by evaporation or skimming. The Ge-bearing alloy is then purified at a temperature above the boiling point of metal M. This process does not require complicated technologies and preserves the high purity of the GeCl4 in the final Ge metal, as the only reactant is metal M, which can be obtained in very high purity grades and continuously recycled.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: March 23, 2010
    Assignee: Umicore
    Inventors: Eric Robert, Tjakko Zijlema
  • Patent number: 7651674
    Abstract: A metal sulfide nanocrystal manufactured by a method of reacting a metal precursor and an alkyl thiol in a solvent, wherein the alkyl thiol reacts with the metal precursor to form the metal sulfide nanocrystals, wherein the alkyl thiol is present on the surface of the metal sulfide nanocrystal, wherein the alkyl thiol is bonded to the sulfur crystal lattice. A metal sulfide nanocrystal manufactured with a core-shell structure by a method of reacting a metal precursor and an alkyl thiol in a solvent to form a metal sulfide layer on the surface of a core, wherein the alkyl thiol is present on the surface of the metal sulfide nanocrystal, wherein the alkyl thiol is bonded to the sulfur crystal lattice. These metal sulfide nanocrystals can have a uniform particle size at the nanometer-scale level, selective and desired crystal structures, and various shapes.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: January 26, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Shin Ae Jun, Eun Joo Jang, Seong Jae Choi
  • Publication number: 20090317313
    Abstract: A method of treating value bearing material comprising oxidised or surface oxidised mineral values includes the steps of crushing the value bearing material, contacting the crushed material! with a sulfide solution to sulfide the oxidised or surface oxidised mineral values, and adding ions of a selected base metal to the crushed value bearing material. The value bearing material may comprise oxidised or surface oxidised base metal or precious metal minerals. The crushed value bearing material is prepared as a slurry or pulp comprising from 15% to 40% solids and the remainder comprising water. The sulfide solution preferably comprises a soluble sulfidiser such as sodium hydrosulfide and the base-metal ion solution preferably comprises metal salt of base metals like copper or iron.
    Type: Application
    Filed: November 13, 2007
    Publication date: December 24, 2009
    Applicant: UNIVERSITY OF CAPETOWN
    Inventors: Deidre Jane Bradshaw, Andrew James Haigh Newell
  • Patent number: 7582276
    Abstract: The invention relates to nanoscale rutile or oxide powder that is obtained by producing amorphous TiO2 by mixing an alcoholic solution with a titanium alcoholate and with an aluminum alcohalate and adding water and acid. The amorphous, aluminum-containing TiO2 is isolated by removing the solvent, and is redispersed in water in the presence of a tin salt. Thermal or hydrothermal post-processing yields rutile or oxide that can be redispersed to primary particle size. The n-rutile or the obtained oxide having a primary particle size ranging between 5 and 20 nm can be incorporated into all organic matrices so that they remain transparent. Photocatalytic activity is suppressed by lattice doping with trivalent ions. If the amorphous precursor is redispersed in alcohol, or not isolated, but immediately crystallized, an anatase is obtained that can be redispersed to primary particle size.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: September 1, 2009
    Assignee: ITN Nanovation AG
    Inventor: Ralph Nonninger
  • Patent number: 7575629
    Abstract: Sorbents for removal of mercury and other pollutants from gas streams, such as a flue gas stream from coal-fired utility plants, and methods for their manufacture and use are disclosed. The methods include mixing fly ash particles with a sulfide salt and a metal salt to form a metal sulfide on the outer surface of the fly ash particles.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: August 18, 2009
    Assignee: BASF Catalysts LLC
    Inventors: Xiaolin David Yang, Pascaline Harrison Tran, Lawrence Shore, Stanley Scott Mack, James Eugene Staudt
  • Patent number: 7575731
    Abstract: The present invention relates to fine particles of a tin-modified rutile-type titanium dioxide obtained through the reaction of an aqueous solution of a titanium compound having a Ti concentration of 0.07 to 5 mol/l at a pH in the range of ?1 to 3 in the co-presence of a tin compound at a molar ratio of tin to titanium (Sn/Ti) of 0.001 to 2, wherein said fine particle has an Sn/Ti composition molar ratio of 0.001 to 0.5, and a short axis and a long axis of a crystal grain diameter thereof have a length of 2 to 20 nm.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: August 18, 2009
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Tomonori Iijima, Norio Nakayama, Toyoharu Hayashi
  • Patent number: 7553474
    Abstract: It is an object to provide a method for producing stable alkaline metal oxide sols having a uniform particle size distribution. The method comprises the steps of: heating a metal compound at a temperature of 60° C. to 110° C. in an aqueous medium that contains a carbonate of quaternary ammonium; and carrying out hydrothermal processing at a temperature of 110° C. to 250° C. The carbonate of quaternary ammonium is (NR4)2CO3 or NR4HCO3 in which R represents a hydrocarbon group, or a mixture thereof. The metal compound is one, or two or more metal compounds selected from a group of compounds based on a metal having a valence that is bivalent, trivalent, or tetravalent.
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: June 30, 2009
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Yutaka Ohmori, Hirokazu Kato, Yoshinari Koyama, Kenji Yamaguchi
  • Patent number: 7498012
    Abstract: The present invention relates to a desulfurization process of pastel and grids of lead accumulators comprising a carbonation in two steps, a granulometric separation between the two steps followed by specific desulfurization of the large part, a desodification obtaining the conversion of the PbSO4 contained in the pastel into PbCO3 which can be easily converted into metallic Pb in an oven by the addition of coal. The system used for the desodification of the large part of the pastel can also be used for the desulfurization of the fine part of the grids.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: March 3, 2009
    Assignee: ENGITEC S.r.l.
    Inventors: Marco Olper, Massimo Maccagni, Silvano Cossali
  • Patent number: 7455825
    Abstract: Disclosed herein is a method for manufacturing metal sulfide nanocrystals using a thiol compound as a sulfur precursor. The method comprises reacting the thiol compound and a metal precursor in a solvent to grow metal sulfide crystals to the nanometer-scale level. Further disclosed is a method for manufacturing metal sulfide nanocrystals with a core-shell structure by reacting a metal precursor and a thiol compound in a solvent to grow a metal sulfide layer on the surface of a core. The metal sulfide nanocrystals prepared by these methods can have a uniform particle size at the nanometer-scale level, selective and desired crystal structures, and various shapes.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: November 25, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Shin Ae Jun, Eun Joo Jang, Seong Jae Choi
  • Patent number: 7347983
    Abstract: Complex ceramic oxides of the general formula Mg2MM?O6+x where M=Rare metal ion or Yttrium or Lanthanum and M?=Sn, Sb, Zr, Hf, Ta, and Nb; and where ?0.5<x<0.5; having a defective pyrochlore structure are useful for active and passive electronic applications, as dielectrics, catalyst sensors, hosts for radioactive waste, etc. This process for the preparation of this class of compounds comprises: (i) mixing the compounds of magnesium, M and M? to get the molar ratio as 2:1:1 (ii) the mixture obtained in step (i) along with a wetting medium may be ball milled or mixed; (iii) the resultant slurry may be dried to obtain dry powder, (iv) the resultant mixture may be heated to a temperature in the range of 1000-1600° C. for the duration ranging from 3 hours to 50 hours, either in a single step or by taking out the reactant after heating, checking for the structure formation and heating again after grinding, if necessary.
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: March 25, 2008
    Assignee: Council of Scientific & Industrial Research
    Inventors: Jose James, Selvaraj Senthilkumar, Kallumelthekethil Vasudevan Pillaj Oonnikrishnan Nair
  • Patent number: 7238596
    Abstract: A process for is provided for synthesizing a compound having the formula E(GeH3)3 wherein E is selected from the group consisting of arsenic (As), antimony (Sb) and phosphorus (P). GeH3Br and [CH3)3Si]3E are combined under conditions whereby E(GeH3)3 is obtained. The E(GeH3)3 is purified by trap-to-trap fractionation. Yields from about 70% to about 76% can be obtained. The E(GeH3)3 can be used as a gaseous precursor for doping a region of a semiconductor material comprising Ge, SnGe, SiGe and SiGeSn in a chemical vapor deposition reaction chamber.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: July 3, 2007
    Assignee: Arizona Board of Regenta, a body corporate of the State of Arizona acting for and on behalf of Arizona State University
    Inventors: John Kouvetakis, Matthew Bauer, John Tolle, Candi Cook
  • Patent number: 7208133
    Abstract: A high temperature non-aqueous synthetic procedure for the preparation of substantially monodisperse IV-VI semiconductor nanoparticles is provided. The procedure includes introducing a first precursor selected from the group consisting of a molecular precursor of a Group IV element and a molecular precursor of a Group VI element into a reaction vessel that comprises at least an organic solvent to form a mixture. Next, the mixture is heated and thereafter a second precursor of a molecular precursor of a Group IV element or a molecular precursor of a Group VI element that is different from the first is added. The reaction mixture is then mixed to initiate nucleation of IV-VI nanocrystals and the temperature of the reaction mixture is controlled to provide nanoparticles having a diameter of about 20 nm or less.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: April 24, 2007
    Assignee: International Business Machines Corporation
    Inventors: Kyung-Sang Cho, Wolfgang Gaschler, Christopher B. Murray, Dmitri Talapin
  • Patent number: 7182929
    Abstract: A method for producing nanostructured multi-component or doped oxide particles and the particles produced therein. The process includes the steps of (i) dissolving salts of cations, which are either dopants or components of the final oxide, in an organic solvent; (ii) adding a dispersion of nanoparticles of a single component oxide to the liquid solution; (iii) heating the liquid solution to facilitate diffusion of cations into the nanoparticles; (iv) separating the solids from the liquid solution; and (v) heat treating the solids either to form the desired crystal structure in case of multi-component oxide or to render the homogeneous distribution of dopant cation in the host oxide structure. The process produces nanocrystalline multi-component or doped oxide nanoparticles with a particle size of 5–500 nm, more preferably 20–100 nm; the collection of particles have an average secondary (or aggregate) particle size is in the range of 25–2000 nm, preferably of less than 500 nm.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: February 27, 2007
    Assignee: NEI, Inc.
    Inventors: Amit Singhal, Ganesh Skandan, Mohit Jain
  • Patent number: 7179441
    Abstract: The present invention relates to a method for preparing barium titanate based powder. More particularly, the present invention provides a method for preparing barium titanate powder comprising the following steps of precipitation of barium titanyl oxalate (BaTiO(C2O4)2.4H2O) with spraying a mixture of an aqueous barium chloride (BaCl2.2H2O) and titanium tetrachloride (TiCl4) to an aqueous solution of oxalic acid, via a nozzle; wet pulverization by using a beads mill after adding an additive such as an amine; dry; pyrolysis; and re-pulverization.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: February 20, 2007
    Assignees: Samsung Fine Chemicals Co., Ltd., Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jae Chul Jung, Woo Young Yang, Keon Il Kim, Yun Jung Park, Jun Hee Lee, Kang Heon Hur, Seon Cheol Park, Jai Joon Lee
  • Patent number: 7157024
    Abstract: The present invention relates to a metal oxide particle comprising tin atom, zinc atom, antimony atom and oxygen atom, having a molar ratio SnO2:ZnO:Sb2O5 of 0.01–1.00:0.80–1.20:1.00 and having a primary particle diameter of 5 to 500 nm; and a process for producing the metal oxide particle comprising the steps of: mixing a tin compound, a zinc compound and an antimony compound in a molar ratio SnO2:ZnO:Sb2O5 of 0.01–1.00:0.80–1.20:1.00; and calcining the mixture at a temperature of 300 to 900° C. The metal oxide particle is used for several purposes such as antistatic agents, UV light absorbers, heat radiation absorbers or sensors for plastics or glass, etc.
    Type: Grant
    Filed: May 24, 2004
    Date of Patent: January 2, 2007
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Tadayuki Isaji, Osamu Fujimoto
  • Patent number: 7125536
    Abstract: This invention relates to a composition comprising nano-structured metal oxide particles (particularly, zirconia) and at least one stabilizing agent, a method to produce the composition, and a method to produce the thermally stable nano-structured particles. The method to produce the nano-structured particles comprises first preparing a base solution and a nanoparticle precursor solution, then combining these solutions at a final pH 7 or greater to precipitate a colloidal hydrous oxide. The colloidal hydrous oxide is then treated with at least one silicate, phosphate, or aluminum phosphate stabilizing agent and dried. These nano-structured particle products have high thermal stability and are particularly advantageous in applications as catalysts or catalyst supports that operate at high temperatures.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: October 24, 2006
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Guoyi Fu, BillieJo Monk, Corinne Lehaut
  • Patent number: 7122168
    Abstract: In a metal oxide nanoparticle and a synthetic method thereof, and in particular to maghemite (?-Fe2O3) nanoparticles usable as a superhigh density magnetic recording substance by having good shape anisotropy and magnetic characteristics, hematite (?-Fe2O3) nanoparticles usable as a precursor to the maghemite or a catalyst, maghemite and hematite-mixed nanoparticles and a synthetic method thereof, the method for synthesizing metal oxide nanoparticles includes forming a reverse micelle solution by adding distilled water, a surfactant and a solvent to metallic salt not less than trivalent, precipitating and separating gel type amorphous metal oxide particles by adding proton scavenger to the reverse micelle solution; adjusting a molar ratio of metal oxide to the surfactant by washing the gel type amorphous metal oxide particles with a polar solvent; and crystallizing metal oxide nanoparticles through heating or reflux after dispersing the gel type amorphous metal oxide particles in a non-polar solvent having a h
    Type: Grant
    Filed: October 1, 2003
    Date of Patent: October 17, 2006
    Assignee: Korea Institute of Science and Technology
    Inventors: Kyoungja Woo, Jae-Pyoung Ahn, Hae-Weon Lee