Search Patents
  • COMPOSITE MATERIALS, BODIES AND NUCLEAR FUELS INCLUDING METAL OXIDE AND SILICON CARBIDE AND METHODS OF FORMING SAME
    Publication number: 20130010914
    Abstract: Methods of forming composite bodies and materials including a metal oxide, such as, uranium dioxide, and silicon carbide are disclosed. The composite materials may be formed from a metal oxide powder, a silicon carbide powder and, optionally, a carbon powder. For example, the metal oxide powder, the silicon carbide powder and the carbon powder, if present, may each be combined with a binder and may be deposited in succession to form a precursor structure. Segments of the precursor structure may be removed and pressed together to form a multi-matrix material that includes interlaced regions of material including at least one of the metal oxide powder, the silicon carbide powder and, optionally, the carbon powder. The segments may be extruded or coextruded with another material, such as, a silicon carbide material, to form a green body. The green body may be sintered to form the composite bodies and materials having a desired final density.
    Type: Application
    Filed: July 8, 2011
    Publication date: January 10, 2013
    Applicant: BATTELLE ENERGY ALLIANCE, LLC
    Inventors: John E. Garnier, Michael V. Glazoff, Sergey Rashkeev, George W. Griffith
  • Method for the production of spherical combustible or fertile material particles
    Patent number: 8535579
    Abstract: A method for the production of spherical combustible or fertile material particles from an oxide of the group of the heavy metals uranium, plutonium, or mixtures thereof. For this purpose, the process steps of producing a base solution of the nitrates of the heavy metal(s), adding at least one first reagent in order to adjust the viscosity of the solution, dropping the solution to form microspheres, at least superficially solidifying the microspheres in an atmosphere containing ammonia, collecting the microspheres in a solution containing ammonia, and subsequent washing, drying and thermal treatment are carried out, where at least one of urea, ammonium carbonate, ammonium hydrogen carbonate, ammonium cyanate, and biuret are added to the base solution before adding the first reagent. The solution thus prepared is heated to a temperature T where 80° C.?T<Ts and where Ts=boiling temperature of the solution, and is maintained at the temperature over a time period t where 2 h?t?8 h.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: September 17, 2013
    Assignee: Nukem Technologies GmbH
    Inventors: Werner Heit, Martin Kadner, Georg Braehler, Karl Froschauer, Guo Wenli, Liang Tonxiang, Tang Chunhe, Yaping Tang
  • Method for removing a heavy metal from a waste stream
    Patent number: 6165367
    Abstract: A method for removing low levels of heavy metal from chemical/industrial waste streams containing interfering anions which typically form strong complexes with heavy metals such as uranium utilizes an ion exchange resin having amino-phosphonic functional groups which selectively capture the heavy metal from the chemical waste stream in an efficient manner such that the amount of heavy metal in the waste stream is reduced to sub-ppm levels. After capture, the resin is treated with a sequestering agent, such as a solution of ammonium fluoride or ammonium sulfate, which releases the heavy metal from the resin. The resin is then regenerated with a sodium solution and returned to service. Utilizing ion exchange and a resin containing amino-phosphonic functional groups allows removal of heavy metal to a level of less than or equal to 0.1 ppm which is a substantial reduction in view of the presence of significant quantities of complexing anions in the waste stream.
    Type: Grant
    Filed: September 19, 1991
    Date of Patent: December 26, 2000
    Assignee: Siemens Power Corporation
    Inventor: Jerry A. Partridge
  • METHOD FOR THE PRODUCTION OF SPHERICAL COMBUSTIBLE OR FERTILE MATERIAL PARTICLES
    Publication number: 20100077657
    Abstract: A method for the production of spherical combustible or fertile material particles from an oxide of the group of the heavy metals uranium, plutonium, or mixtures thereof. For this purpose, the process steps of producing a base solution of the nitrates of the heavy metal(s), adding at least one first reagent in order to adjust the viscosity of the solution, dropping the solution to form microspheres, at least superficially solidifying the microspheres in an atmosphere containing ammonia, collecting the microspheres in a solution containing ammonia, and subsequent washing, drying and thermal treatment are carried out, where at least one of urea, ammonium carbonate, ammonium hydrogen carbonate, ammonium cyanate, and biuret are added to the base solution before adding the first reagent. The solution thus prepared is heated to a temperature T where 80° C.?T<Ts and where Ts=boiling temperature of the solution, and is maintained at the temperature over a time period t where 2 h?t?8 h.
    Type: Application
    Filed: May 20, 2008
    Publication date: April 1, 2010
    Applicant: NUKEM TECHNOLOGIES GMBH
    Inventors: Werner Heit, Martin Kadner, Georg Braehler, Karl Froschauer, Guo Wenli, Liang Tonxiang, Tang Chunhe
  • Magnetic metal
    Patent number: 5334265
    Abstract: The magnetic material disclosed in a preferred embodiment of the invention contains the following relative proportion of components, at. %:______________________________________ at least one of the rare earth elements selected 12.0-17.0; from the group consisting of Neodymium and Praseodymium at least one of the rare earth elements selected 0.1-5.0 from the group consisting of Dysprosium and Terbium at least one of the elements selected from the 0.5-4.0; group consisting of Aluminum, Niobium, and Chrome at least one of the elements selected from the group 0.1-1.5; consisting of Titanium, Hafnium, Zirconium, Vanadium and Titanium Cobalt 2.0-6.0 Boron 6.5-8.5 Uranium 0.05-1.
    Type: Grant
    Filed: February 4, 1993
    Date of Patent: August 2, 1994
    Assignee: Aura System Inc.
    Inventors: Rady E. Shalin, Alexandr N. Savich, Evgeny B. Kachanov, Alexandr F. Petrakov, Vadim P. Piskorsky, Alexandr I. Vevjurko, Vladislav K. Orlov, Eduard N. Shingarev, Sergei I. Ivanov, Jury V. Khaskin, Alexandr S. Buinovsky, Vladimir M. Kondakov
  • Apparatus and method for orienting a downhole tool in a horizontal or deviated well
    Patent number: 5964294
    Abstract: A tool for performing a downhole function in a horizontal or highly deviated well has a downhole structure with a longitudinal axis and constructed to turn about the axis in response to a moment applied about the axis. The structure includes at least one ballast chamber containing a flowable inert ballast material, such that the gravitational center of the material-containing chamber is effectively offset from the longitudinal axis of the structure to enable the chamber to contribute to gravitational orientation of the tool within the well to a desired position. In another configuration, the structure is rotatable within a housing and supported by bearings. The chamber is preferably filled with tungsten or depleted uranium powder for maximum density. A swivel for use with the tool, capable of passing both hydraulic pressure and detonation waves, decreases the overall length of the rotating part of the tool string.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: October 12, 1999
    Assignee: Schlumberger Technology Corporation
    Inventors: A. Glen Edwards, Klaus B. Huber
  • Method for improving metals recovery using high temperature pressure leaching
    Patent number: 7517384
    Abstract: The present invention is directed to a system for recovering metal values from metal-bearing materials. During a reactive process, a seeding agent is introduced to provide a nucleation site for the crystallization and/or growth of solid species which otherwise tend to passivate the reactive process or otherwise encapsulate the metal value, thereby reducing the amount of desired metal values partially or completely encapsulated by such material. The seeding agent may be generated in a number of ways, including the recycling of residue or the introduction of foreign substances. Systems embodying aspects of the present invention may be beneficial for recovering a variety of metals such as copper, gold, silver, nickel, cobalt, molybdenum, zinc, rhenium, uranium, rare earth metals, and platinum group metals from any metal-bearing material, such as ores and concentrates.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: April 14, 2009
    Assignee: Phelps Dodge Corporation
    Inventors: John O. Marsden, Robert E. Brewer, Joanna M. Robertson, David R. Baughman, Philip Thompson, Wayne W. Hazen, Roland Schmidt
  • PROCESSES FOR RECOVERING METALS FROM AQUEOUS SOLUTIONS
    Publication number: 20140127095
    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: Application
    Filed: November 7, 2012
    Publication date: May 8, 2014
    Applicant: CYTEC TECHNOLOGY CORP.
    Inventors: Troy Allan Bednarski, Violina Antoneta Cocalia, Matthew Dean Soderstrom, Eduardo Alberto Kamenetzky, Andrew Michael Cameron, Douglas HARRIS
  • Method of recovering nuclear fuel material
    Patent number: 9845542
    Abstract: According to an embodiment, a nuclear fuel material recovery method of recovering a nuclear fuel material containing thorium metal by reprocessing an oxide of a nuclear fuel material containing thorium oxide in a spent fuel is provided. The method has: a first electrolytic reduction step of electrolytically reducing thorium oxide in a first molten salt of alkaline-earth metal halide; a first reduction product washing step of washing a reduction product; and a main electrolytic separation step of separating the reduction product. The first molten salt further contains alkali metal halide, and contains at least one out of a group consisting of calcium chloride, magnesium chloride, calcium fluoride and magnesium fluoride. The method may further has a second electrolytic reduction step of electrolytically reducing uranium oxide, plutonium oxide, and minor actinoid oxide in a second molten salt of alkali metal halide.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: December 19, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuya Takahashi, Koji Mizuguchi, Reiko Fujita, Hitoshi Nakamura, Shohei Kanamura, Naoki Kishimoto, Yoshikazu Matsubayashi, Takashi Oomori
  • Devices including at least one adhesion layer and methods of forming adhesion layers
    Patent number: 8971161
    Abstract: Devices that include a near field transducer (NFT), the NFT having a disc and a peg, and the peg having five surfaces thereof; and at least one adhesion layer positioned on at least one of the five surfaces of the peg, the adhesion layer including one or more of the following: rhenium, osmium, iridium, platinum, hafnium, ruthenium, technetium, rhodium, palladium, beryllium, aluminum, manganese, indium, boron, and combinations thereof beryllium oxide, silicon oxide, iron oxide, zirconium oxide, manganese oxide, cadmium oxide, magnesium oxide, hafnium oxide, and combinations thereof tantalum carbide, uranium carbide, hafnium carbide, zirconium carbide, scandium carbide, manganese carbide, iron carbide, niobium carbide, technetium carbide, rhenium carbide, and combinations thereof chromium nitride, boron nitride, and combinations thereof.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: March 3, 2015
    Assignee: Seagate Technology LLC
    Inventors: Yuhang Cheng, Tong Zhao, Michael C. Kautzky, Ed F. Rejda, Kurt W. Wierman, Scott Franzen, Andrew J. Boyne, Michael Allen Seigler, Sethuraman Jayashankar
  • Catalysts based on highly dispersed metal oxides, comprising in particular zirconia
    Patent number: 5472924
    Abstract: Catalyst comprising at least one zirconium oxide, characterized in that it consists, for at least 85% of its weight, of a thermally stable support with a specific surface greater than or equal to 150 m.sup.2 /g containing from 60 to 99 weight % of at least one zirconium oxide and from 40 to 1 weight % of at least one metal oxide of at least one metal chosen from the group consisting of metals from Groups V, VI and VII, noble metals such as ruthenium, osmium, rhodium, iridium and uranium, and the elements phosphorus, arsenic and sulphur, the support being obtained by the molten salts technique by introduction of a mixture of salts into a eutectic mixture of alkali metal nitrates or sulphates which, after dehydration, is maintained between 250.degree. and 550.degree. C., from 30 minutes to 5 hours.
    Type: Grant
    Filed: August 30, 1994
    Date of Patent: December 5, 1995
    Assignee: Elf Aquitaine Production
    Inventors: Pavel Afanasiev, Martine Boulinguiez, Michele Breysse, Christophe Geantet, Thierry des Courieres
  • PROCESSES FOR PREPARING ALUMINA AND MAGNESIUM CHLORIDE BY HCl LEACHING OF VARIOUS MATERIALS
    Publication number: 20150225808
    Abstract: The disclosed processes can be effective for treating various materials comprising several different metals. These materials can be leached with HCl for obtaining a leachate and a solid. Then, they can be separated from one another and a first metal can be isolated from the leachate. Then, a second metal can further be isolated from the leachate. The first and second metals can each be substantially selectively isolated from the leachate. This can be done by controlling the temperature of the leachate, adjusting pH, further reacting the leachate with HCl, etc. The metals that can be recovered in the form of metal chlorides can eventually be converted into the corresponding metal oxides, thereby allowing for recovering HCl. The various metals can be chosen from aluminum, iron, zinc, copper, gold, silver, molybdenum, cobalt, magnesium, lithium, manganese, nickel, palladium, platinum, thorium, phosphorus, uranium, titanium, rare earth element and rare metals.
    Type: Application
    Filed: September 26, 2013
    Publication date: August 13, 2015
    Inventors: Richard Boudreault, Denis Primeau, Marie-Maxime Labrecque-Gilbert, Hubert Dumont
  • Multi-core fuel rod for research reactor and manufacturing method thereof
    Patent number: 7430267
    Abstract: The present invention relates to a multi-core fuel rod for research reactor and, more particularly, to a multi-core fuel rod for research reactor in which monolithic fuel cores made of uranium-molybdenum alloy are disposed in an aluminum matrix in a multi-core form. The multi-core fuel rod in accordance with the present invention provides a minimized contact surface area between nuclear fuel and aluminum, and reduces the formation of pores and swelling by restraining formation of reaction layer to avoid excessive reaction between the fuel and aluminum. Therefore, improved stability of nuclear fuel can be obtained by minimizing temperature rise as well as achieving high density and thermal conductivity of the fuel.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: September 30, 2008
    Assignees: Korea Atomic Energy Research Institute, Korea Hydro & Nuclear Power Co., Ltd.
    Inventors: Chul Gyo Seo, Ho Jin Ryu, Chang Kyu Kim, Yoon Sang Lee, Jong Man Park, Don Bae Lee, Seok Jin Oh
  • METHOD FOR STRIPPING URANIUM(VI) AND AN ACTINIDE(IV) FROM AN ORGANIC SOLUTION BY OXALIC PRECIPITATION
    Publication number: 20240079157
    Abstract: A method for stripping U(VI) and an An(IV) from an organic solution including tri-n-butyl phosphate in an organic diluent, the solution containing U(VI) and the An(IV) present as U(VI) nitrate and An(IV) nitrate at concentrations such that the U(VI) nitrate concentration is higher than the An(IV) nitrate concentration, and the sum of the U(VI) nitrate and An(IV) nitrate concentrations is ?55 g/L. The method includes contacting the organic solution and an aqueous solution of nitric and oxalic acids, the oxalic acid concentration in the aqueous solution and the O/A volume ratio selected so that the oxalic acid is deficient with respect to the stoichiometric conditions of a complete precipitation of U(VI) and actinide(IV), to obtain a precipitate containing the actinide(IV) in oxalate form and a fraction of the U(VI) in oxalate form with a U(VI)/actinide(IV) mass ratio of between 0.5 and 5; and separating the precipitate from the organic and aqueous solutions.
    Type: Application
    Filed: August 30, 2023
    Publication date: March 7, 2024
    Inventors: Daniel Meyer, Muriel Bertrand, Damien Bourgeois, Julie Durain
  • Process for producing phenols
    Patent number: 4390736
    Abstract: A method for production of phenol or nucleus-substituted phenols from benzoic acid or nucleus-substituted benzoic acids by gas-phase catalytic oxidation characterized by using an oxide catalyst of the formula,Mo.sub.a W.sub.b X.sub.c Y.sub.d Z.sub.e O.sub.fwherein Mo is molybdenum, W is at least one of vanadium, niobium and tantalum, X is at least one of copper, silver, manganese, iron, cobalt, nickel, rhodium, palladium and platinum, Y is at least one of cerium, uranium, zirconium, chromium, tungsten, zinc, cadmium, tin, phosphorus, antimony, bismuth and tellurium, Z is at least one of thallium, alkali metals and alkaline earth metals, and when a is fixed to 12, b is 0.1 to 60, c is 0.1 to 60, d is 0 to 24, e is 0.1 to 120 and f is the number of oxygen atoms satisfying the valence of other elements.
    Type: Grant
    Filed: November 10, 1981
    Date of Patent: June 28, 1983
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yasuhiko Inoue, Shigeo Wake, Tamio Sirafuji, Masazo Beppu
  • Reactive projectiles for exploding unexploded ordnance
    Patent number: 6546838
    Abstract: A projectile for the destruction of unexploded ordnance comprising a dart shell having a core region which contains a reactive composition comprised of a reactive metal and an oxidizer. The reactive metal is selected from the group consisting of titanium, aluminum, magnesium, lithium, beryllium, zirconium, thorium, uranium, hafnium, alloys thereof, hydrides thereof, and combinations thereof. The oxidizer is selected from the group consisting of lithium perchlorate, magnesium perchlorate, ammonium perchlorate, potassium perchlorate, chlorates, peroxides, and combinations thereof. In an alternative embodiment, the reactive composition is located on the outside of a center penetrating rod. Also included is a disposable apparatus for delivering a projectile to destroy unexploded ordnance. The apparatus is comprised of a block having a top and a bottom, the block comprised of a material selected from the group consisting of wood and polymeric resin.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: April 15, 2003
    Inventors: Peter D. Zavitsanos, Michael C. Matthews, Charles W. Files, Dmitri Bohn
  • PROCESSES FOR RECOVERING METALS FROM AQUEOUS SOLUTIONS
    Publication number: 20110005354
    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: Application
    Filed: July 6, 2010
    Publication date: January 13, 2011
    Applicant: CYTEC TECHNOLOGY CORP.
    Inventors: Troy Allan Bednarski, Violina Antoneta Cocalia, Matthew Dean Soderstrom, Eduardo Alberto Kamenetzky, Andrew Michael Cameron, Douglas Harris
  • INTELLIGENT EXPERIMENTAL DEVICE FOR COLLABORATIVE MINING OF ASSOCIATED RESOURCES
    Publication number: 20230393165
    Abstract: An intelligent experimental device for collaborative mining of associated resources includes a signal transmission mechanism, a pressure maintaining mechanism, a feeding mechanism, and a reaction mechanism. The signal transmission mechanism includes a centralized controller, an annunciator, signal receivers, a power supply, a power cord, signal transmitters, and signal sensing valves. The pressure maintaining mechanism includes ambient and axial pressure oil chambers, ambient and axial pressure pumps, ambient and axial pressure liquid distribution tanks, a comprehensive pressure distribution pipe, and hydraulic transmission pipes. The feeding mechanism includes monitoring analyzers, temperature controllers, solution transfer pipes, seepage pumps, mixture conveying pipes, a comprehensive liquid distributor, an aggregate chamber, a liquid chamber, an oil chamber, a gas chamber, a mixing chamber and an analytical purifier.
    Type: Application
    Filed: May 19, 2022
    Publication date: December 7, 2023
    Inventors: Tong ZHANG, Xiang YU, Yankun MA, Yanfang LI, Liang YUAN, Zegong LIU
  • Method of recovering nuclear fuel material
    Patent number: 10323330
    Abstract: According to an embodiment, a nuclear fuel material recovery method of recovering a nuclear fuel material containing thorium metal by reprocessing an oxide of a nuclear fuel material containing thorium oxide in a spent fuel is provided. The method has: a first electrolytic reduction step of electrolytically reducing thorium oxide in a first molten salt of alkaline-earth metal halide; a first reduction product washing step of washing a reduction product; and a main electrolytic separation step of separating the reduction product. The first molten salt further contains alkali metal halide, and contains at least one out of a group consisting of calcium chloride, magnesium chloride, calcium fluoride and magnesium fluoride. The method may further has a second electrolytic reduction step of electrolytically reducing uranium oxide, plutonium oxide, and minor actinoid oxide in a second molten salt of alkali metal halide.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: June 18, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuya Takahashi, Koji Mizuguchi, Reiko Fujita, Hitoshi Nakamura, Shohei Kanamura, Naoki Kishimoto, Yoshikazu Matsubayashi, Takashi Oomori
  • Dehydrocoupling of toluene
    Patent number: 4243825
    Abstract: Toluene dehydrocoupled products are produced by heating toluene in the vapor phase with an inorganic metal/oxygen composition which functions as an oxygen carrier and has the empirical formula:M.sub.a.sup.1 M.sub.b.sup.2 O.sub.xwhere M.sup.1 is thallium and M.sup.2 is at least one element selected from arsenic, antimony, thorium, uranium, the lanthanides or rare earths, Groups 3b, 4b, 5b, and 7b of the Periodic Table of the Elements, and mixtures thereof, and wherein a is 1, b is 0.01 to 10, and x is a number taken to satisfy the average valences of M.sup.1 and M.sup.2 in the oxidation states in which they exist in the composition. Alternatively, the same inorganic metal/oxygen composition can be employed as a catalyst or as a combination catalyst/oxygen carrier for the dehydrocoupling reaction when oxygen or an oxygen-containing gas is heated with the toluene.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: January 6, 1981
    Assignee: Monsanto Company
    Inventors: Alex N. Williamson, Samuel J. Tremont
Narrow Results

Filter by US Classification