At 300 Degrees C Or Greater Patents (Class 75/363)
  • Patent number: 10167532
    Abstract: A isolating method including: (i) arranging material forming a magnetic phase as a demagnetised powder, having an average particle size no larger than 700 ?m without particles not making up the magnetic phase; (ii) dissolving the powder of step (i) in an acid medium with at least one oxidising agent in the presence of hydroxide ions, at a pH strictly lower than 7; (iii) precipitating the adjacent metal element(s) in the hydroxide state by adding to the solution obtained at the end of step (ii) an effective amount of hydroxylated base; (iv) isolating the metal hydroxide precipitate formed at the end of step (iii) and, when necessary, recovering same; (v) precipitating the rare earth elements in the oxalate state in the solution without adjacent metal element(s) and obtained at the end of step (iv); and (vi) recovering the rare earths in the precipitated state of rare earth oxalate.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: January 1, 2019
    Assignee: COMMISSARIAT À L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Richard Laucournet, Céline Lecorre
  • Patent number: 9764388
    Abstract: A method for preparing a tantalum power of capacitor grade, comprising: solid tantalum nitride is added when potassium fluotantalate is reduced by sodium. The method increases the nitrogen content in the tantalum powder, and at the same time improves the electrical performance of the tantalum powder. The specific capacitance is increased, and the leakage current and loss is improved. The qualification rate of the anode and the capacitor product is also improved. The method is characterized in that the nitrogen in the tantalum nitride diffuses between the particles of the tantalum powder, with substantially no loss, and thus the nitrogen content is accurate and controllable.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: September 19, 2017
    Assignees: NINGXIA ORIENT TANTALUM INDUSTRY CO., LTD., NATIONAL ENGINEERING RESEARCH CENTER FOR SPECIAL METAL MATERIALS OF TANTALUM AND NIOBIUM
    Inventors: Guoqi Yang, Aiguo Zheng, Yuewei Cheng, Yuezhong Ma
  • Patent number: 9679675
    Abstract: Disclosed is a process to reduce mixtures of at least one metal halide by molten metal reduction of the liquid phase metal halide in an alkali or alkaline earth metal to form a reaction product comprising at least one metal mixture and a halide salt coating, in which the at least one metal halide is in stoichiometric excess to the molten metal reductant and wherein the reductant is consumed in the reaction and does not need to be removed at the end of the reaction.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: June 13, 2017
    Assignee: Boston Electronic Materials LLC
    Inventor: Andrew Matheson
  • Patent number: 9273378
    Abstract: The alloy fine particles of the present invention are fine particles of a solid solution alloy, in which a plurality of metal elements are mixed at the atomic level. The production method of the present invention is a method for producing alloy fine particles composed of a plurality of metal elements. This production method includes the steps of: (i) preparing a solution containing ions of the plurality of metal elements and a liquid containing a reducing agent; and (ii) mixing the solution with the liquid that has been heated.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: March 1, 2016
    Assignee: Japan Science and Technology Agency
    Inventors: Hiroshi Kitagawa, Kohei Kusada, Rie Makiura
  • Patent number: 9199307
    Abstract: The present invention relates to the tantalum powder and the process for preparing the same, and also relates to the electrolytic capacitor anode made of the tantalum powder. More particularly, the present invention relates to the tantalum powder having a BET surface area not more than 0.530 m2/g, Fisher mean particle size not less than 3.00 ?m. The present invention relates to the process for preparing the tantalum powder, wherein the tantalum powder is prepared through reducing tantalum compound with a reducing agent, wherein the tantalum powder as seed is added during reduction, and said tantalum powder as seed is the tantalum powder that has been milled.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: December 1, 2015
    Assignee: Ningxia Orient Tantalum Industry Co., Ltd.
    Inventors: Guoqi Yang, Wenfeng Shi, Xifang Bao, Yong Li, Zhongxiang Li, Zhangong Dong, Xiaoyan Yang
  • Patent number: 8951328
    Abstract: The invention relates to the production of valve metal powders, in particular, tantalum powders by reduction of a corresponding valve metal compound, for example, K2TaF7, with an alkali metal in the presence of a diluent salt, whereby the reduction is carried out in the presence of a particle diminution agent, preferably, Na2SO4, which is added to the reaction mixture continuously or in aliquots.
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: February 10, 2015
    Assignee: H.C. Starck GmbH
    Inventors: Josua Löffelholz, Frank Behrens, Siegfried Schmieder
  • Patent number: 8888889
    Abstract: The invention is directed to systems and methods for making non-hollow, non-fragmented spherical metal or metal alloy particles using diffusion dryers.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: November 18, 2014
    Assignees: E I du Pont de Nemours and Company, University of Maryland
    Inventors: Howard David Glicksman, Sheryl Ehrman, Alex Langrock, George Lee Peabody, V, Kai Zhong
  • Patent number: 8840701
    Abstract: Disclosed are methods of making multi-element, finely divided, metal powders containing one or more reactive metals and one or more non-reactive metals. Reactive metals include metals or mixtures thereof from titanium (Ti), zirconium (Zr), hafnium (Hf), tantalum (Ta), niobium (Nb), vanadium (V), nickel (Ni), cobalt (Co), molybdenum (Mo), manganese (Mn), and iron (Fe). Non-reactive metals include metals or mixtures such as silver (Ag), tin (Sn), bismuth (Bi), lead (Pb), antimony (Sb), zinc (Zn), germanium (Ge), phosphorus (P), gold (Au), cadmium (Cd), berrylium (Be), tellurium (Te).
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: September 23, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: William J. Borland, Howard David Glicksman
  • Patent number: 8758476
    Abstract: Provided are a method of producing mixed powder comprising noble metal powder and oxide powder, wherein powder of ammonium chloride salt of noble metal and oxide powder are mixed, the mixed powder is subsequently roasted, and ammonium chloride is desorbed by the roasting process in order to obtain mixed powder comprising noble metal powder and oxide powder, and mixed powder comprising noble metal powder and oxide powder, wherein chlorine is less than 1000 ppm, nitrogen is less than 1000 ppm, 90% or more of the grain size of the noble metal powder is 20 ?m or less, and 90% or more of the grain size of the oxide powder is 12 ?m or less. Redundant processes in the production of noble metal powder are eliminated, and processes are omitted so that the inclusion of chlorine contained in the royal water and nitrogen responsible for hydrazine reduction reaction is eliminated as much as possible.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: June 24, 2014
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Atsutoshi Arakawa, Kazuyuki Satoh, Atsushi Sato
  • Patent number: 8709368
    Abstract: The invention provides a preparation process of transition metal boride, comprising the following steps: A) aluminum is put in a reactor, inert gas is fed into the reactor after evacuation, the reactor is heated up to 700 to 800° C. and then added with dry potassium fluoborate or sodium fluoborate, monomer boron and cryolite are generated by rapid stirring and reaction for 4 to 6 hours, and the molten liquid at the upper layer is sucked out and the monomer boron is obtained by means of separation; and B) the obtained monomer boron is added with transition metal for reaction at the temperature from 1800 to 2200° C. in order to generate corresponding transition metal boride.
    Type: Grant
    Filed: December 9, 2012
    Date of Patent: April 29, 2014
    Assignee: Shenzhen Sunxing Light Alloys Materials Co., Ltd.
    Inventors: Xuemin Chen, Jun Yang, Zhihong Li, Weiping Wu
  • Publication number: 20140093445
    Abstract: High-purity iron powder products produced by a low-temperature process by feeding hematite and a reducing agent into a rotary reactor under pressure to form a mechanical fluid bed. The fluid bed is rotated at a particular speed within a rotary reactor. The fluid bed is simultaneously heated to a reaction temperature, and the pressure is then reduced within the rotary reactor to a pressure in a range of 0.01 bars to 2.0 bars, as a result reducing the reaction temperature to a temperature in a range of 600° C. to 850° C. Maintaining the pressure and the rotation results in the formation of a high-purity iron oxide without the requirement for post-grinding process steps because sintering is prevented by using a combination of pressure reduction and a rotary set at an optimum rotation speed, resulting in useful additives produced by a more environmentally-friendly process.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 3, 2014
    Inventor: Carla D. Di Luca
  • Patent number: 8641996
    Abstract: A cyclic preparation method including the following steps: a) boric acid or boric anhydride is added with hydrofluoric acid and then with potassium sulfate for reaction to generate potassium fluoborate; titanium-iron concentrate is added with hydrofluoric acid and then with potassium sulfate for reaction to generate potassium fluotitanate; B) the potassium fluoborate is mixed with the potassium fluotitanate, and the mixture reacts with aluminum to generate titanium boride and potassium cryolite; C) the potassium cryolite is sucked out and then fed into a rotary reaction kettle together with concentrated sulfuric acid, hydrogen fluoride gas as well as potassium sulfate and potassium aluminum sulfate are generated by reaction in the rotary reaction kettle, and the hydrogen fluoride gas is collected and then dissolved in water to obtain hydrofluoric acid aqueous solution; and D) the obtained hydrofluoric acid aqueous solution and potassium sulfate aqueous solution are recycled.
    Type: Grant
    Filed: December 9, 2012
    Date of Patent: February 4, 2014
    Assignee: Shenzhen Sunxing Light Alloys Materials Co., Ltd.
    Inventors: Xuemin Chen, Yueming Yu, Qingdong Ye, Jun Yang, Zhi Zhou
  • Publication number: 20130263699
    Abstract: The present invention discloses a method for recovering rare earth particulate material from an assembly comprising a rare earth magnet and comprises the steps of exposing the assembly to hydrogen gas to effect hydrogen decrepitation of the rare earth magnet to produce a rare earth particulate material, and separating the rare earth particulate material from the rest of the assembly. The invention also resides in an apparatus for separating rare earth particulate material from an assembly comprising a rare earth magnet. The apparatus comprises a reaction vessel having an opening which can be closed to form a gas-tight seal, a separator for separating the rare earth particulate material from the assembly, and a collector for collecting the rare earth particulate material. The reaction vessel is connected to a vacuum pump and a gas control system, and the gas control system controls the supply of hydrogen gas to the reaction vessel.
    Type: Application
    Filed: May 31, 2013
    Publication date: October 10, 2013
    Inventors: Ivor Rex Harris, Andrew Williams, Allan Walton, John D. Speight
  • Publication number: 20130133483
    Abstract: Selective gas-reducing methods for making shape-defined metal-based nanoparticles. By avoiding the use of solid or liquid reducing reagents, the gas reducing reagent can be used to make shape well-defined metal- and metal alloy-based nanoparticles without producing contaminates in solution. Therefore, the post-synthesis process including surface treatment become simple or unnecessary. Weak capping reagents can be used for preventing nanoparticles from aggregation, which makes the further removing the capping reagents easier. The selective gas-reducing technique represents a new concept for shape control of nanoparticles, which is based on the concepts of tuning the reducing rate of the different facets. This technique can be used to produce morphology-controlled nanoparticles from nanometer- to submicron- to micron-sized scale. The Pt-based nanoparticles show improved catalytic properties (e.g., activity and durability).
    Type: Application
    Filed: March 8, 2011
    Publication date: May 30, 2013
    Applicant: UNIVERSITY OF ROCHESTER
    Inventors: Hong Yang, Jianbo Wu, Miao Shi, Adam Gross
  • Publication number: 20130129563
    Abstract: Low temperature gas-phase methods for the preparation of faceted aluminum crystals are disclosed.
    Type: Application
    Filed: September 14, 2012
    Publication date: May 23, 2013
    Inventors: Daniel KAPLOWITZ, R. Jason JOUET, Michael R. ZACHARIAH
  • Publication number: 20130098204
    Abstract: The present invention provides a method for producing a granular metallic iron in which an adhesion inhibitor leveler, an agglomerate leveler, a discharger, and the physical state of materials present on the hearth are optimized to thereby enable agglomerate to be spread in a single layer. The agglomerate hence is evenly heat-treated to enable high-quality granular metallic iron to be produced in satisfactory yield.
    Type: Application
    Filed: August 26, 2011
    Publication date: April 25, 2013
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Ryota Misawa, Sumito Hashimoto, Osamu Tsuge
  • Publication number: 20130091987
    Abstract: The invention provides a pollution-free reuse method for iron-based grinding waste, involving the technology of recycling economy, with special reference to the metallurgical industry, iron-based grinding waste green recycling technology. The present invention of the iron grinding waste recycling and reuse methods includes degreasing, heat treatment, sieving, matching, and obtains iron-based alloyed powders, which can be used in SHS lined steel pipe, powder metallurgy structural component, magnetic grinding, thermal spray. More than 95% iron-based alloyed powders can be recycled from wide source of iron-based grinding waste. The invention has the advantage of low cost, no secondary pollution and wide application.
    Type: Application
    Filed: August 16, 2012
    Publication date: April 18, 2013
    Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
    Inventors: Shengen ZHANG, Bo LIU, Jianjun TIAN, Dean PAN, Bin LI
  • Publication number: 20130074654
    Abstract: A technique that further improves the process for producing granular metal involves heating agglomerates and reducing and melting a metal oxide in the agglomerates. The process includes feeding agglomerates containing a metal oxide and a carbonaceous reducing agent onto a hearth of a moving hearth reduction melting furnace, heating the agglomerates to reduce and to melt the metal oxide, cooling the granular metal obtained by the heating, and discharging the cooled granular metal out of the furnace to recover the same. The agglomerates have an average diameter of not smaller than 17.5 mm are fed onto the hearth when the agglomerates are heated at a spread density of not lower than 0.5 on the hearth.
    Type: Application
    Filed: June 3, 2011
    Publication date: March 28, 2013
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventor: Shuzo Ito
  • Patent number: 8388727
    Abstract: The invention relates to the manufacture of titanium hydride powder using continuous or semi-continuous process, and using titanium slag or synthetic rutile as raw materials, while hydrogen, titanium tetrachloride, titanium trichloride, titanium dichloride, and hydrogen chloride are participate as intermediate reaction products. The continuous comprises: (a) reduction of TiCl4 to low titanium chlorides followed by cooling a mixture, (b) separating of residual TiCl4 from solid low chlorides by heating the mixture in argon or vacuum up to 150° C. followed by removing the titanium tetrachloride from the mixture, (c) dissociation of TiCl3 to TiCl2 at 450° C. in vacuum followed by removal of gaseous titanium tetrachloride from the reaction zone, condensation to the liquid, and returning back into the reaction retort, (d) dissociation of TiCl2 in vacuum at 750-850° C. to manufacture fine powder of metallic titanium and titanium tetrachloride, whereby hydrogen heated up to 1000° C.
    Type: Grant
    Filed: January 11, 2010
    Date of Patent: March 5, 2013
    Assignee: ADMA Products, Inc.
    Inventors: Andrey Klevtsov, Alexander Nikishin, Jury Shuvalov, Vladimir Moxson, Volodymyr Duz
  • Patent number: 8377166
    Abstract: A method of recovering silver from a silver chloride mixture in which hydrogen gas is passed through the mixture to produce a metal chloride hydride which is then heated to dissociate the metal and to release hydrogen chloride gas.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: February 19, 2013
    Assignee: Prior Engineering Services AG
    Inventors: Philippus Jacobus Mostert, Adalbert Prior
  • Patent number: 8357251
    Abstract: A powder processing method includes degassing a metallic powder in a rotating chamber that is evacuated to a sub-atmospheric pressure. The method may also include storing the metallic powder in a rotating storage chamber that is pressurized to a super-atmospheric pressure with a dry cover gas.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: January 22, 2013
    Assignee: United Technologies Corporation
    Inventor: Thomas J. Watson
  • Publication number: 20130000449
    Abstract: The invention provides a crystalline Ti powder produced in a molten salt medium, said powder comprising predominantly particles of single ?-Ti crystals that are directly applicable in powder metallurgy.
    Type: Application
    Filed: December 23, 2011
    Publication date: January 3, 2013
    Applicant: CSIR
    Inventors: David Steyn Van Vuuren, Salomon Johannes Oosthuizen
  • Publication number: 20120291593
    Abstract: The present invention relates to the tantalum powder and the process for preparing the same, and also relates to the electrolytic capacitor anode made of the tantalum powder. More particularly, the present invention relates to the tantalum powder having a BET surface area not more than 0.530 m2/g, Fisher mean particle size not less than 3.00 ?m. The present invention relates to the process for preparing the tantalum powder, wherein the tantalum powder is prepared through reducing tantalum compound with a reducing agent, wherein the tantalum powder as seed is added during reduction, and said tantalum powder as seed is the tantalum powder that has been milled.
    Type: Application
    Filed: August 2, 2012
    Publication date: November 22, 2012
    Inventors: Guoqi Yang, Wenfeng Shi, Xifang Bao, Yong Li, Zhongxiang Li, Zhangong Dong, Xiaoyan Yang
  • Patent number: 8287771
    Abstract: Provided is a method for producing a silver particle powder excellent in the dispersibility in a liquid organic medium having a low polarity, which comprises reducing a silver compound in an alcohol having a boiling point of from 80° C. to 200° C. or in a polyol having a boiling point of from 150 to 300° C., at a temperature of from 80° C. to 200° C. under reflux while maintaining the stream having a Reynolds number of not more than 3.70×104. The stream having a Reynolds number of not more than 3.70×104 can be maintained by stirring with a stirring power of not more than 5.68×108 W. According to the method, a silver particle powder having good low-temperature sinterability and good dispersibility and suitable for use for microwiring formation can be obtained at a high yield.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: October 16, 2012
    Assignee: Dowa Electronics Materials Co., Ltd.
    Inventors: Kimitaka Sato, Yutaka Hisaeda
  • Publication number: 20120156088
    Abstract: The invention provides a method for the preparation of FePt or CoPt nanoparticles in ionic liquids, which in certain embodiments constitutes a direct method for the preparation of such nanoparticles having the face-centred tetragonal (fct) crystalline form. The invention also provides FePt or CoPt nanoparticles obtainable by a method of the invention.
    Type: Application
    Filed: August 17, 2010
    Publication date: June 21, 2012
    Inventors: Pascal Andre, Shu Chen, Kris Anderson, Mark James Muldoon
  • Publication number: 20120137829
    Abstract: The present invention discloses a method for recovering rare earth particulate material from an assembly comprising a rare earth magnet and comprises the steps of exposing the assembly to hydrogen gas to effect hydrogen decrepitation of the rare earth magnet to produce a rare earth particulate material, and separating the rare earth particulate material from the rest of the assembly. The invention also resides in an apparatus for separating rare earth particulate material from an assembly comprising a rare earth magnet. The apparatus comprises a reaction vessel having an opening which can be closed to form a gas-tight seal, a separation means for separating the rare earth particulate material from the assembly, and a collection means for collecting the rare earth particulate material. The reaction vessel is connected to a vacuum pump and a gas control system, and the gas control system controls the supply of hydrogen gas to the reaction vessel.
    Type: Application
    Filed: June 27, 2011
    Publication date: June 7, 2012
    Inventors: Ivor Rex Harris, Andrew Williams, Allan Walton, John Speight
  • Patent number: 8182573
    Abstract: The present invention relates the manufacture of metal powders, non-oxidic ceramic powders and reduced metal oxide powders using an improved flame spray pyrolysis (“FSP”) process. The invention further relates to an apparatus specifically adapted to said process, to powders/naoncomposites obtained by said process and to the use of said powders/nanocompsites.
    Type: Grant
    Filed: September 4, 2006
    Date of Patent: May 22, 2012
    Assignee: ETH Zürich
    Inventors: Wendelin Stark, Robert N. Grass, Evagelos-Kimon Athanassiou
  • Publication number: 20120100034
    Abstract: The present invention relates to a process for producing sponge iron with in-situ carbon removal. The process for producing the sponge iron includes the steps of preparing a sandwich of at least two layers wherein the at least two layers includes a first layer (10) of iron oxide source which content is carbon free or comprises of only self-contaminant carbon or carbonaceous and second layer (12) is a mixture of iron oxide source and carbon source and subjecting the sandwich of at least two layers to a pyrolysis process in a non-oxidative environment at temperature between 950° C. to 1900° C. for a period between 10 minutes to 36 hours. The carbon source in the second layer (12) is equal to or more than stoichiometric weight of carbon according to a predominant reaction. The non-oxidative pyrolysis occurs in a reactor. The sandwich of two layers is placed in a moving carrier (16) such as tray to accommodate the sandwich of two layers in the reactor.
    Type: Application
    Filed: March 26, 2010
    Publication date: April 26, 2012
    Applicant: IOP SPECIALISTS SDN. BHD.
    Inventor: Kin Onn Low
  • Patent number: 8157889
    Abstract: A magnetic metal powder having fluidity is provided which is composed of FePt nanoparticles synthesized by the polyol synthesis method that possess fct (face-centered tetragonal) structure and exhibit crystal magnetic anisotropy from immediately after synthesis. Specifically, there is provided a magnetic metal powder having fluidity which is composed of magnetic metal particles whose main components and the contents thereof are represented by the following general formula (1): [TXM1?X]YZ1?Y??(1), where T is one or both of Fe and Co, M is one or both of Pt and Pd, Z is at least one member selected from the group composed of Ag, Cu, Bi, Sb, Pb and Sn, X represents 0.3˜0.7, and Y represents 0.7˜1.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: April 17, 2012
    Assignee: Dowa Electronics Materials Co., Ltd.
    Inventor: Kazuyuki Tohji
  • Patent number: 8092571
    Abstract: The present invention relates to a combustion reactor for nanopowders, a synthesis apparatus for nanopowders using the combustion reactor, and a method of controlling the synthesis apparatus. The combustion reactor for nanopowders comprises an oxidized gas supply nozzle connected to an oxidized gas tube; a gas supply unit supplying a fuel gas and a precursor gas; and a reaction nozzle forming concentricity on an inner wall of the oxidized gas supply nozzle to be connected to the gas supply unit and having an inlet opening for supplying an oxidized gas disposed at a region adjacent to a jet orifice for spraying flames.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: January 10, 2012
    Assignee: Korea Institute of Science and Technology
    Inventors: Jong-Ku Park, Jae-Pyoung Ahn, Hyoung-Chul Kim, Seung-Yong Lee, Hyun-Seock Jie, Hoon Park
  • Publication number: 20110300062
    Abstract: A low-temperature process of producing high-purity iron powder by feeding hematite and a reducing agent into a rotary reactor under pressure to form a mechanical fluid bed. The fluid bed is rotated at a particular speed within a rotary reactor. The fluid bed is simultaneously heated to a reaction temperature, and the pressure is then reduced within the rotary reactor to a pressure in a range of 0.01 bars to 2.0 bars, as a result reducing the reaction temperature to a temperature in a range of 600° C. to 850° C. Maintaining the pressure and the rotation results in the formation of a high-purity iron oxide without the requirement for post-grinding process steps because sintering is prevented by using a combination of pressure reduction and a rotary set at an optimum rotation speed, resulting in useful additives produced by a more environmentally-friendly process.
    Type: Application
    Filed: June 8, 2010
    Publication date: December 8, 2011
    Inventor: Carla D. Di Luca
  • Publication number: 20110194970
    Abstract: Nanocrystalline metal powders comprising tungsten, molybdenum, rhenium or niobium can be synthesized using a combustion reaction. Methods for synthesizing the nanocrystalline metal powders are characterized by forming a combustion synthesis solution by dissolving in water an oxidizer, a fuel, and a base-soluble, ammonium precursor of tungsten, molybdenum, rhenium, or niobium in amounts that yield a soichiometric burn when combusted. The combustion synthesis solution is then heated to a temperature sufficient to substantially remove water and to initiate a self-sustaining combustion reaction. The resulting powder can be subsequently reduced to metal form by heating in a reducing gas environment.
    Type: Application
    Filed: February 5, 2010
    Publication date: August 11, 2011
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: John G. Frye, Kenneth Scott Weil, Curt A. Lavender, Jin Yong Kim
  • Patent number: 7967890
    Abstract: In various aspects provided are methods for producing a nanoparticle within a cross-linked, collapsed polymeric material. In various embodiments, the methods comprise (a) providing a shape-static polymer template with a size in the range between about 1 nm to about 100 nm; (b)) incorporating one or more nanoparticle precursor moieties with the shape-static polymer template; and either (c) oxidizing the precursor moieties to form a composite nanoparticle comprising one or more of an inorganic oxide and hydroxide nanoparticle; or (c) adding an ion with an opposite charge polarity to the at least one nanoparticle precursor moieties to effect formation of a composite nanoparticle.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: June 28, 2011
    Assignee: Vive Nano, Inc.
    Inventors: Darren Anderson, Jose Amado Dinglasan, Nikolai Loukine
  • Patent number: 7955857
    Abstract: The invention relates to a spray pyrolysis method characterized in that it is used in the synthesis of nanoparticles with a closed structure of metal chalcogens having a lamellar crystalographic structure of general formula MaXb, wherein M represents a metal and X represents a chalcogen, a and b represent the respective proportions of metal and chalcogen, and in that it comprises pyrolysis of a liquid aerosol obtained from a solution of at least one metal precursor (M) and a chalcogen (X), or at least one precursor of said metal (M) and at least one precursor of said chalcogen (X) dissolved in a solvent, said solution being atomized into fine droplets in a suspension in a vector gas.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: June 7, 2011
    Assignee: Centre National de la Recherche Scientifique (C.N.R.S.)
    Inventors: Stéphane Bastide, Claude Levy-Clement, Dominique Duphil, Jean-Pascal Borra
  • Publication number: 20110113925
    Abstract: A method of and system for processing red mud, the method comprising the step of heating red mud to form at least molten slag, and preferably at least molten iron and molten slag.
    Type: Application
    Filed: November 3, 2008
    Publication date: May 19, 2011
    Inventor: Kevin Philippe Daniel Perry
  • Patent number: 7892599
    Abstract: Methods for functionalizing the surface of nanomaterials to improve processing and product manufacturing. These methods are useful for oxides, nitrides, carbides, borides, metals, alloys, chalcogenides, and other compositions.
    Type: Grant
    Filed: July 27, 2004
    Date of Patent: February 22, 2011
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Tapesh Yadav, Karl Pfaffenbach
  • Publication number: 20110023656
    Abstract: A method for producing granular metallic iron by heating and reducing a raw material mixture which includes an iron oxide-containing material, a carbonaceous reductant and a Li2O supplying material in a thermal reduction furnace, wherein the iron oxide-containing material includes a hematite-containing material, and the raw material mixture includes at least Fe, Ca, Mg, Si and Li as constituent elements in such a manner that slag which forms as a by-product during heating and reduction contains CaO, MgO, SiO2 and Li2O, has a Li2O content of 0.05% by mass or more, and the slag has a basicity [(CaO+MgO)/SiO2] in a range of from 1.5 to 1.9. This method enables granular metallic iron to be produced at a high productivity even when a hematite-containing material is used as the iron oxide-containing material.
    Type: Application
    Filed: April 6, 2009
    Publication date: February 3, 2011
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd.)
    Inventors: Kazutaka Kunii, Takahiro Kudo
  • Publication number: 20110005353
    Abstract: A magnetic metal powder having fluidity is provided which is composed of FePt nanoparticles synthesized by the polyol synthesis method that possess fct (face-centered tetragonal) structure and exhibit crystal magnetic anisotropy from immediately after synthesis. Specifically, there is provided a magnetic metal powder having fluidity which is composed of magnetic metal particles whose main components and the contents thereof are represented by the following general formula (1): [TXM1-X]YZ1-Y??(1), where T is one or both of Fe and Co, M is one or both of Pt and Pd, Z is at least one member selected from the group composed of Ag, Cu, Bi, Sb, Pb and Sn, X represents 0.3˜0.7, and Y represents 0.7˜1.
    Type: Application
    Filed: November 12, 2008
    Publication date: January 13, 2011
    Inventor: Kazuyuki Tohji
  • Patent number: 7846232
    Abstract: A method of producing titanium metal from a titanium-containing material includes the steps of producing a solution of M?TiF6 from the titanium-containing material, selectively precipitating M?2TiF6 from the solution by the addition of (M?)aXb and using the selectively precipitated M?2TiF6 to produce titanium. M? is a cation of the type which forms a hexafluorotitanate, M? is selected from ammonium and the alkali metal cations, X is an anion selected from halide, sulphate, nitrite, acetate and nitrate and a and b are 1 or 2.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: December 7, 2010
    Assignee: Adams & Adams
    Inventor: Gerard Pretorius
  • Publication number: 20100266846
    Abstract: Disclosed are a method of producing metal nanoparticles continuously, and metal nanoparticles produced thereby. The method comprises: (a) preparing a metal precursor solution by dissolving a metal precursor in alcohol; (b) continuously putting the metal precursor solution into a reactor having supercritical conditions, thereby producing metal nanoparticles; (c) cooling the solution obtained in step (b); and (d) separating and collecting the metal nanoparticles from the solution obtained in step (c).
    Type: Application
    Filed: April 14, 2010
    Publication date: October 21, 2010
    Inventors: Jaehoon KIM, Jae Duck Kim, Jong Min Park, Hong Gon Kim, Byoung Koun Min
  • Publication number: 20100242680
    Abstract: A process for synthesizing metal submicron and nano-scale powders for use in articles of manufacture. In a suitable reactor, single metal or multiple metal complexes are heated to a temperature whereby, upon contact with hydrogen gas, an exothermic reaction begins. The further temperature rise in response to the exothermic reaction is minimized by reducing the external heat input, thereby minimizing the agglomeration or sintering of the metal nano-scale particles resulting from the process. Preferably, after drawing a vacuum on the metal complexes in the reactor, the hydrogen is introduced at about, equal to or below ambient pressure and the reaction is purposely made slow to prevent agglomeration or sintering.
    Type: Application
    Filed: June 10, 2010
    Publication date: September 30, 2010
    Applicant: CHEMNANO, INC.
    Inventor: WEI WU
  • Publication number: 20100158747
    Abstract: A process and system for producing tantalum or other valve metal particles is provided comprising forming tantalum particles in a reduction process carried out in a reactor vessel, and using a siphon to transfer fine tantalum particles out of the reaction mixture to a recovery vessel. This particle transfer can occur while the reaction mixture is agitated. The tantalum particles can be automatically withdrawn when the reaction mixture has a depth level greater than the fluid level of the tantalum fine particle recovery vessel, and outflow automatically stops when the fluid levels of the reactor and particle recovery vessel equilibrate. Tantalum or other valve metal powders made by the processes, and capacitors made with valve metal powders are also provided.
    Type: Application
    Filed: November 20, 2009
    Publication date: June 24, 2010
    Inventor: Hitoshi Iijima
  • Publication number: 20100139455
    Abstract: The present invention provides a method for preparing nanoparticles of group IV elements, particularly nanoparticles of Si, Ge and Sn, and binary and ternary alloys of these elements. The method comprises the solution-phase decomposition of one or more group IV metal precursors at elevated temperature and under an inert atmosphere at atmospheric pressure, using a decomposition-promoting reagent. A surface-bonding agent is added to the reaction mixture to form an organic layer surrounding the nanoparticles and prevent aggregation.
    Type: Application
    Filed: September 4, 2007
    Publication date: June 10, 2010
    Inventors: Richard David Tilley, Christopher William Bumby
  • Publication number: 20100065789
    Abstract: Provided is a method for producing a silver particle powder excellent in the dispersibility in a liquid organic medium having a low polarity, which comprises reducing a silver compound in an alcohol having a boiling point of from 80° C. to 200° C. or in a polyol having a boiling point of from 150 to 300° C., at a temperature of from 80° C. to 200° C. under reflux while maintaining the stream having a Reynolds number of not more than 3.70×104. The stream having a Reynolds number of not more than 3.70×104 can be maintained by stirring with a stirring power of not more than 5.68×108 W. According to the method, a silver particle powder having good low-temperature sinterability and good dispersibility and suitable for use for microwiring formation can be obtained at a high yield.
    Type: Application
    Filed: February 15, 2007
    Publication date: March 18, 2010
    Inventor: Kamitaka Sato
  • Publication number: 20100031774
    Abstract: The present invention relates to an apparatus and a method of manufacturing metal nanoparticles, and more particularly to an apparatus including: a precursor supplying part which supplies a precursor solution of metal nanoparticles; a first heating part which is connected with the precursor supplying part, includes a reactor channel having a diameter of 1 to 50 mm, and is heated to the temperature range where any particle is not produced; a second heating part which is connected with the first heating part, includes a reactor channel having a diameter of 1 to 50 mm, and is heated to the temperature range where particles are produced; and a cooler which is connected with the second heating part and collects and cools metal nanoparticles produced at the second heating part which allows continuous mass production of metal nanoparticles.
    Type: Application
    Filed: May 7, 2008
    Publication date: February 11, 2010
    Inventors: Young-Il Lee, Jae-Woo Joung, Byung-Ho Jun, Joon-Rak Choi, Kwi-Jong Lee
  • Patent number: 7645318
    Abstract: In various aspects provided are methods for producing a nanoparticle within a cross-linked, collapsed polymeric material. In various embodiments, the methods comprise (a) providing a shape-static polymer template with a size in the range between about 1 nm to about 100 nm; (b)) incorporating one or more nanoparticle precursor moieties with the shape-static polymer template; and either (c) oxidizing the precursor moieties to form a composite nanoparticle comprising one or more of an inorganic oxide and hydroxide nanoparticle; or (c) adding an ion with an opposite charge polarity to the at least one nanoparticle precursor moieties to effect formation of a composite nanoparticle.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: January 12, 2010
    Assignee: Vive Nano, Inc.
    Inventors: Darren Anderson, Jose Amado Dinglasan, Nikolai Loukine
  • Patent number: 7604679
    Abstract: An efficient process for producing fine nickel powder, capable of metallizing the powder at low temperature to prevent its sintering, and fine nickel powder produced by the process, composed of particles having a flat shape, diameter of limited variations and uniform thickness, and suitable for internal electrodes for laminate ceramic capacitors of high electric capacity. The process comprises a step for forming a nickel compound coated with gelatin by adsorbing gelatin on preformed nickel compound particles with different size and shape (Step (A)), and another step for converting said nickel compound coated with gelatin into fine particles containing metallic nickel and nickel oxide by heating the nickel compound coated with gelatin produced in Step (A) in an inert gas atmosphere (Step (B)). It may include an additional step (Step (C)), subsequent to Step (B), for completely reducing nickel oxide in said fine particles by heating at temperature lower than that for Step (B) in a reducing gas atmosphere.
    Type: Grant
    Filed: November 4, 2005
    Date of Patent: October 20, 2009
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Yasumasa Hattori, Egon Matijevic
  • Patent number: 7601198
    Abstract: Ammonium hexachlororuthenate is produced by adding ammonium chloride to a hydrochloric acid solution containing ruthenium. The ammonium hexachlororuthenate is baked to obtain the ruthenium powder. When the moisture content of the ammonium hexachlororuthenate is high, the baked product is so hard sintered product that its pulverization is not easy. In accordance with the present invention, the following steps are carried out. Hydrochloric acid solution containing ruthenium is held at a temperature of 80 to 95° C. for three hours or longer. The ammonium chloride is then added to the hydrochloric acid solution which is stirred by a stirring mill at the rotation of 200 revolutions per minute or more. The hydrochloric acid solution is held at a temperature of from 85 to 95° C. for 1 hour while being stirred at 200 rpm. The resultant precipitate of ammonium hexachlororuthenate is filtered. The inventive crystals of precipitated ammonium hexachlororuthenate has 10 mass % or less of moisture content.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: October 13, 2009
    Assignee: Nippon Mining & Metals Co., Ltd.
    Inventors: Hifumi Nagai, Yuji Kawano
  • Patent number: 7591871
    Abstract: A method for providing a route for the synthesis of a Ge(0) nanometer-sized material from. A Ge(II) precursor is dissolved in a ligand heated to a temperature, generally between approximately 100° C. and 400° C., sufficient to thermally reduce the Ge(II) to Ge(0), where the ligand is a compound that can bond to the surface of the germanium nanomaterials to subsequently prevent agglomeration of the nanomaterials. The ligand encapsulates the surface of the Ge(0) material to prevent agglomeration. The resulting solution is cooled for handling, with the cooling characteristics useful in controlling the size and size distribution of the Ge(0) materials. The characteristics of the Ge(II) precursor determine whether the Ge(0) materials that result will be nanocrystals or nanowires.
    Type: Grant
    Filed: February 17, 2005
    Date of Patent: September 22, 2009
    Assignee: Sandia Corporation
    Inventors: Henry Gerung, Timothy J. Boyle, Scott D. Bunge
  • Patent number: 7544229
    Abstract: The present invention discloses a novel method for the production of metallic nano-powder. This cost-effective, simple process is customized for a full-scale production of metallic nano-powders containing a first metal, and comprising the following of forming an alloy comprising said first metal and at least one soluble metal; applying first thermal treatment in the manner homogenized alloy is obtained; applying a cold work to the homogenized alloy so thin strips are obtained; applying a second thermal treatment to the alloy until a phase composition of predetermined characteristics is obtained; subjecting the said alloy to a leaching agent adapted to effectively leach out the least one soluble metal; filtering and washing the powder; washing the powder; drying the powder; coating the powder with chemicals; and then de-agglomerating the coated powder. The present invention also discloses a cost-effective and highly pure metallic powder produced by the method defined above.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: June 9, 2009
    Assignee: Cima NanoTech Israel Ltd.
    Inventors: Arkady Garbar, Fernando De La Vega, Einat Matzner