Forming Oxide Or Carbonate Patents (Class 423/35)
  • Patent number: 10626021
    Abstract: Methods for preparing solid metal oxide nanoparticles via controlled oxidation comprising preparing a plurality of metal nanoparticles, contacting the plurality of metal nanoparticles with an aqueous agent to provide metal oxide nanoparticles having a desired particle size, and removing the resulting metal oxide nanoparticles from the aqueous agent. Aspects of the present disclosure also relate to solid metal oxide nanoparticles obtained by this method.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: April 21, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Nam Hawn Chou, Ryan McKenney
  • Patent number: 9328400
    Abstract: An improved method for treating manganese-containing materials, such as seafloor manganese nodules, by leaching such materials with aqueous HNO3 and polymerized nitric oxide (N2O3)x, and more particularly to methods for recovering valuable constituents from such nodules, especially manganese, cobalt, nickel, iron, and copper. It also provides a method to leach manganese-containing material to release any titanium, vanadium, cerium, molybdenum and other metals from the manganese oxides and to make them available to be recovered, as well as providing a method of producing a fertilizer grade nitrate product.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: May 3, 2016
    Assignee: DEEPGREEN ENGINEERING, PTE. LTD.
    Inventors: William F. Drinkard, Hans J. Woerner, William M. Nixon
  • Patent number: 8460575
    Abstract: The invention is directed to a solid, porous material, suitable for generating nitrogen gas, said material having a porosity of 20 to 75 vol. %, and a composition comprising, based on the weight of the material of 60 to 90 wt. % of sodium azide, 0.1 to 20 wt. % of an inert chemical coolant based on at least one inorganic salt having a heat capacity of at least 1400 J/K/kg, 0.1 to 20 wt. % of modifying agent selected from metal oxides and metal carbonates, and a binder, selected from the group consisting of at least one alkali metal silicate, preferably waterglass, or a poly-tetrazole, in an amount of between 3 and 15 wt. %.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: June 11, 2013
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
    Inventor: Laurens Daniël van Vliet
  • Publication number: 20110274598
    Abstract: Disclosed is a process for removing metals from waste, particularly electronic waste (or “e-waste”). The process generally includes the steps of dissolving at least some of the metals from the waste with nitric acid reagent and then causing at least some of the metals to precipitate as metal oxides and/or metal nitrates. NOx gases produced as by-product by the nitric acid dissolution of metallic components in the electronic waste are reused, in particular for generating permanganate when one of the metallic components comprises manganese.
    Type: Application
    Filed: April 14, 2009
    Publication date: November 10, 2011
    Inventor: James R. Akridge
  • Patent number: 8038979
    Abstract: Disclosed is a method of manufacturing a metal oxide nano powder comprising preparing a first dispersed solution by adding a nano-sized metal powder to water and dispersing the metal powder within the water, performing a hydration reaction of the first dispersed solution at a temperature of about 30 to about 70° C. to generate a precipitation, and filtering and drying the precipitation to prepare a metal oxide powder. Also, disclosed is a metal oxide nano powder manufactured by the method described above, and having any one of a bar-form, a cube-form, and a fiber-form.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: October 18, 2011
    Assignee: Korea Atomic Energy Research Institute
    Inventors: Chang Kyu Rhee, Min Ku Lee, Young Rang Uhm, Jin Ju Park, Byung Sun Han, Hi Min Lee, Seung-Hee Woo
  • Patent number: 7897052
    Abstract: A method for removing arsenite and arsenate from water is provided. The method comprises reacting the water with cupric oxide (CuO) particles for a predetermined time and filtering the reacted water. A system for removing arsenite and arsenate from liquids is also provided.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: March 1, 2011
    Assignee: University of Wyoming
    Inventor: Katta J. Reddy
  • Patent number: 7776306
    Abstract: A method of forming basic copper carbonates includes providing an aqueous solution comprising copper (II), ammonia, and carbonic acid; and adding sufficient carbon dioxide to precipitate a basic copper carbonate from the aqueous solution.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: August 17, 2010
    Assignee: Peninsula Copper Industries Incorporated
    Inventors: Jeff Miller, Brian Miller, Nader Mazloom
  • Patent number: 7351343
    Abstract: The present invention generally relates to a copper metal recovery system, able to integrate with a waste treatment system of a circuit board manufacture plant, includes a stirring unit, a crystallization unit and a pressure filtering unit. More than 2 parts of weight of acidic copper-containing etching process effluent, less than 1 parts of weight of copper-containing slurry, and less than 1 part of weight of waste mixture of an acidic copper-containing photolithography effluent and an acidic frame etching effluent are charged into the stirring unit to conduct decomposition. Alkaline hydroxide reacts with decomposition products in the crystallization unit. The temperature of the crystallization unit is at least 80° C. The pressure filtering unit outputs a copper hydroxide solution or a copper oxide solution.
    Type: Grant
    Filed: April 22, 2005
    Date of Patent: April 1, 2008
    Inventors: Shen-Tsung Huang, Ta-Chiang Chang
  • Patent number: 7297315
    Abstract: The invention provides a method of recovering a copper component or a manganese component from a cleaning agent containing copper oxide, a cleaning agent containing basic copper carbonate, a cleaning agent containing copper hydroxide, or a cleaning agent containing copper oxide and manganese oxide, the cleaning agents having been used for removing, through contact with a harmful gas, a phosphine contained as a harmful component in the harmful gas. Also, the invention provides a method of recovering a copper component or a manganese component from a cleaning agent containing basic copper carbonate, a cleaning agent containing copper hydroxide, or a cleaning agent containing copper oxide and manganese oxide, the cleaning agents having been used for removing, through contact with a harmful gas, a phosphine contained as a harmful component in the harmful gas.
    Type: Grant
    Filed: February 2, 2004
    Date of Patent: November 20, 2007
    Assignee: Japan Pionics Co., Ltd
    Inventors: Kenji Otsuka, Takashi Shimada, Minoru Osugi, Kei Kawaguchi
  • Patent number: 7122167
    Abstract: A supercritical oxidation process carried out in water is capable of oxidizing “organics” in precious metal organic compositions such as heterogeneous (Pt/C) or homogeneous precious metal catalysts and producing a precious metal oxide with few by-products and low losses of precious metal.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: October 17, 2006
    Assignees: Johnson Matthey Public Limited Company, Chematur Engineering AB
    Inventors: Simon Collard, Anders Gidner, Brian Harrison, Lars Stenmark
  • Patent number: 6998069
    Abstract: The electrode material for positive electrodes of rechargeable lithium batteries is based on a lithium transition metal oxide. Said lithium transition metal oxide is a lithium transmission metal mixed oxide with at least two transition metals (for example nickel and/or manganese), has a layer structure and is doped (for example, with aluminium and/or boron). This inventive electrode material is characterized by a high cycle stability, yet is still economical to produce.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: February 14, 2006
    Assignee: Ferro GmbH
    Inventors: Marcello Coluccia, Reinhard Nesper, Petr Novak
  • Patent number: 6860933
    Abstract: A sol-gel process for producing layers of zirconium oxide is described which comprises the following stages: (i) production of a soluble, zirconium-containing powder by: (a) reaction of a zirconium alcoholate of the general formula Zr(OR)4, in which the residues R are the same or different and represent straight-chain, branched or cyclic alkyl or alkenyl residues with 1 to 10 carbon atoms, which optionally exhibit one or more carbonyl and/or ester and/or carboxyl functions, with one or more polar compounds having complexing, chelating properties, (b) heating the solution, (c) mixing the solution with water, optionally in the presence of a catalyst, (d) concentrating the solution until a powder is obtained, (ii) dissolving the powder forming a sol, (iii) coating a substrate with the sol, and (iv) annealing the coated substrate.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: March 1, 2005
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung
    Inventors: Peer Löbmann, Walther Glaubitt, Dieter Sporn
  • Patent number: 6716403
    Abstract: The invention provides a method of recovering a copper component or a manganese component from a cleaning agent containing copper oxide, a cleaning agent containing basic copper carbonate, a cleaning agent containing copper hydroxide, or a cleaning agent containing copper oxide and manganese oxide, the cleaning agents having been used for removing, through contact with a harmful gas, a phosphine contained as a harmful component in the harmful gas. Also, the invention provides a method of recovering a copper component or a manganese component from a cleaning agent containing basic copper carbonate, a cleaning agent containing copper hydroxide, or a cleaning agent containing copper oxide and manganese oxide, the cleaning agents having been used for removing, through contact with a harmful gas, a phosphine contained as a harmful component in the harmful gas.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: April 6, 2004
    Assignee: Japan Pionics Co., Ltd.
    Inventors: Kenji Otsuka, Takashi Shimada, Minoru Osugi, Kei Kawaguchi
  • Patent number: 6656390
    Abstract: A process is provided for the preparation of a metallic oxide composite including mixing an aqueous solution of a water-soluble metal compound and colloidal silica, depositing the mixture upon a substrate, heating the mixture-coated substrates at temperatures from about 150° C. to about 300° C. for time sufficient to form a metallic oxide film, and, removing the silica from the metallic oxide film whereby a porous metal oxide structure is formed.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: December 2, 2003
    Assignee: The Regents of the University of California
    Inventors: Lin Song Li, Quanxi Jia
  • Patent number: 5702575
    Abstract: An improved active electrode for use in planar sensors has been discovered, the electrode prepared by a process comprising combining a base component with a metal paste and heating the paste in the presence of air for a time sufficient to oxidize a portion of the electrode to produce the metal/metal oxide electrode. The electrodes may be incorporated into various planar sensor formats, particularly pH and CO.sub.2 sensors.
    Type: Grant
    Filed: November 1, 1995
    Date of Patent: December 30, 1997
    Assignee: Chiron Diagnostics Corporation
    Inventors: Joseph S. Foos, John S. Benco
  • Patent number: 5409686
    Abstract: In a process of producing copper(I) oxide by the action of an aqueous solution of a mineral acid and of oxygen-containing gas on small-lump copper metal with continuous agitation, a temperature from 10.degree. to 40.degree. C., preferably from 15.degree. to 35.degree. C., is maintained to effect a formation of particulate yellow copper(I) oxide (Cu.sub.2 O). An organic acid of the group consisting of formic acid, acetic acid, ascorbic acid, preferably ascorbic acid, may be used in addition to the mineral acid.
    Type: Grant
    Filed: December 19, 1991
    Date of Patent: April 25, 1995
    Assignee: Norddeutsche Affinerie Aktiengesellschaft
    Inventors: Gerd Mrusek, Hermann Winkler, Michael Stelter, Klaus P. Hugk
  • Patent number: 5152973
    Abstract: The invention process provides a metal oxide, or oxides of more than one more metal, wherein the oxides have a mean particle size less than 1 micron. The oxides are made by steps including (1) reacting an aqueous solution of a metal salt (or salts) that form insoluble carbonate(s), thereby to form a carbonate precipitate, followed by (b) recovering the precipitate, e.g., by filtration; (c) redispersing the precipitate in water to form a second very dilute slurry; (d) spray-drying said second slurry; (e) calcining the spray-dried product at a low temperature (e.g., 540.degree. C.), followed by a final calcination in atmosphere consisting of flowing oxygen initially under reduced pressure (e.g., 2 Torr). The spray-dried spheroids comprise particles having a mean particle size less than one micron, a property carried over into the products of both calcinations.
    Type: Grant
    Filed: May 8, 1990
    Date of Patent: October 6, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Nicholas D. Spencer
  • Patent number: 5089452
    Abstract: A method for preparing a catalyst precursor for methanol synthesis using copper sulfate recovered from low-cost copper etching waste solution as the source of copper, which comprises using recovered copper sulfate containing the mother liquor in the amount of 10% by weight or less, and adding a zinc or aluminum compound, and, optionally, further adding a boron compound to the recovered copper sulfate. The catalyst prepared by such method has all of the characteristics of a catalyst prepared with an expensive starting material, such as conventional metal nitrates. By using such method, the catalyst cost can be reduced to a great extent, thus rendering the method of great commercial value.
    Type: Grant
    Filed: May 9, 1991
    Date of Patent: February 18, 1992
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Tadasi Nakamura, Kinya Tsuji, Yoriko Obata
  • Patent number: 5008017
    Abstract: Waste liquors containing small amounts of silver salts are treated with aluminum hydroxide to produce a floc reduced in volume by the addition of an acid and mixed with a metal bicarbonate and metal carbonate in amounts sufficient to affect solidification.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: April 16, 1991
    Assignee: Eastman Kodak Company
    Inventors: Gary G. Kiehl, Robert G. Surash
  • Patent number: 4891067
    Abstract: A process for the treatment of flue dust from copper and lead smelters includes the steps of subjecting a slurry (10) of water and flue dust to a first caustic leach (12) to form a first liquids soluble sulfate solution (14) and a first solids portion (15), subjecting the solids portion to a second caustic leach (16) to solubilize lead and arsenic in a second liquid portion (22) and, selectively extracting the arsenic from the second liquid portion by precipitation (23).
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: January 2, 1990
    Assignee: Kennecott Utah Copper Corporation
    Inventors: Alkis S. Rappas, Brett T. Waterman
  • Patent number: 4774218
    Abstract: A catalyst for the vapor phase intramolecular dehydration reaction of an alkanolamine represented by the general formula ##STR1## wherein each of R and R' is selected from hydrogen, a methyl group and an ethyl group, and n is an integer of 2 to 5, to convert it into a cyclic amine represented by the general formula ##STR2## wherein R, R' and n are as defined above. The catalyst is an oxide composition represented by the following formulaX.sub.a P.sub.b Y.sub.c O.sub.dwherein X is at least one element selected from alkali metals and alkaline earth metals, P is phosphorus, Y is at least one element selected from B, Al, Si, S, Sc, Ti, Cu, Y, Zr, Nb, Mo, Sn, Sb, La, Ce, Ta, W, Tl, Pb, Bi and Th, O is oxygen, the suffixes a, b, c and d represent the atomic ratios of the elements X, P, Y and O, and when a=1, b=0.01-3 and c=0-100, and d is a value determined by a, b and c and the state of bonding of the constituent elements.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: September 27, 1988
    Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
    Inventors: Yuuji Shimasaki, Hideaki Tuneki, Youichi Hino, Hitoshi Yano, Michio Ueshima
  • Patent number: 4764284
    Abstract: Process for removing Sr and heavy metals from water in particular from waste water by throughly mixing it with a solution of an alkali metal carbonate and/or hydrogen carbonate in a reactor containing a fluidized bed of suitable bed material. The obtained heavy metal carbonate crystals crystallize onto said bed material and the obtained heavy metal carbonate crystals in granular form are removed from the reactor from time to time.The heavy metals which may be removed are Ni, Zn, Cu, Fe, Ag, Pb, Cd or Hg.
    Type: Grant
    Filed: May 8, 1986
    Date of Patent: August 16, 1988
    Assignee: DHV Raadgevend Ingenieursbureau B.V.
    Inventor: Cornelis W. Jansen
  • Patent number: 4659555
    Abstract: The invention relates to a process for the preparation of basic copper carbonate by reacting copper salts with alkali carbonate in aqueous solution at elevated temperatures and with stirring and subsequently isolating the copper carbonate. In this process, a waste solution from copper etching processes which contains hydrochloric acid and sodium chloride, is stirred into a 5 to 15 weight percent solution of alkali carbonate heated to 40.degree. to 70.degree. C., the pH of the solution not being allowed to fall below 6.5, and the precipitated basic copper carbonate is separated from the aqueous solution in a known manner. A light green, basic copper carbonate is obtained, which is free of copper chloride and copper oxide.
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: April 21, 1987
    Assignee: Th. Goldschmidt AG 03
    Inventors: Werner Gottfried, Ernst Mack, Lothar Witzke
  • Patent number: 4655829
    Abstract: Metal values are separated from arsenic sulfide ores in a hydrometallurgical oxidation process using a balanced reactant slurry. The molar concentration of As and Sb in the reactant slurry is controlled with respect to the molar concentration of Cu, Pb, and Zn in the slurry so that, upon reacting, soluble arsenic compounds or toxic arsenic vapors are not formed.
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: April 7, 1987
    Assignee: CSS Management Corp.
    Inventor: Joseph B. Cashman
  • Patent number: 4652381
    Abstract: A process of treating industrial waste water contaminated with environmentally unacceptable amounts of sulfuric acid and heavy metals such as lead, copper or zinc is disclosed which permits lowering of the concentration of the contaminants to a level permitting discharge to the sewer. Waste water resulting from floor wash and spray washing of lead acid batteries prior to shipment from the manufacturing facility contains sufficient sulfuric acid to cause the pH to normally be at a level of about 2 along with heavy metal contaminants present in concentrations which require treatment for removal before the discharge water will meet EPA standards. The water to be treated is directed to a first reaction and settling vessel where calcium carbonate is added along with an oxidation medium such as air which also functions to stir the stored waste water.
    Type: Grant
    Filed: July 22, 1985
    Date of Patent: March 24, 1987
    Assignee: Farmland Industries, Inc.
    Inventor: James L. Inglis
  • Patent number: 4614640
    Abstract: Copper(II) hydroxide is produced by a reaction of copper oxychloride in an aqueous suspension with alkali hydroxide or alkaline earth metal hydroxide in the presence of a stabilizing agent and the product is separated and washed. To improve the stability of the copper hydroxide and to avoid a black coloring by copper oxide, inorganic silicon compounds which contain hydroxyl groups (SiOH) in the molecules or form such groups in an aqueous medium are added to the suspension. It is desirable to use particulate solid silicic acids or silicic acids which are soluble in water or colloidally dissolved.
    Type: Grant
    Filed: May 22, 1985
    Date of Patent: September 30, 1986
    Assignee: Norddeutsche Affinerie AG
    Inventors: Hartmut Ploss, Jurgen Lehne
  • Patent number: 4585477
    Abstract: A method of recovering copper and nickel from sulphidic minerals containing copper, nickel and iron comprises the steps of roasting the mineral, preferably to provide magnetite; sulphating, for example with sulphuric acid, sulphur trioxide, metal sulphate and/or sulphur dioxide together with oxygen; and a subsequent leaching of the sulphated material and recovery of copper from the leaching solution, for example by electrolysis. All or part of the leaching solution with its nickel content is recycled to the roasting stage, and the nickel content is removed in the form of nickel oxide together with the leaching residue, from which nickel can be recovered.
    Type: Grant
    Filed: February 11, 1985
    Date of Patent: April 29, 1986
    Assignee: Boliden Aktiebolag
    Inventor: Thomas K. Mioen
  • Patent number: 4404169
    Abstract: In a process of producing cupric hydroxides, products having a high stability in storage will be obtained if phosphate ions are added to a suspension of copper oxychloride in an aqueous phase, the copper oxychloride is then reacted with alkali metal hydroxide or alkaline earth metal hydroxide, and the cupric hydroxide precipitated as a result of the suspension is washed and then re-suspended and subsequently stabilized by the addition of acid phosphate to adjust a pH value of 7.5 to 9. The suspended copper oxychloride is preferably reacted in the presence of phosphate ions in an amount of 1 to 4 grams per liter of the suspension and at a temperature of 20.degree. to 25.degree. C. and the resulting cupric hydroxide is stabilized with phosphate ions in an amount of 3 to 6 grams per liter of the suspension.
    Type: Grant
    Filed: November 18, 1982
    Date of Patent: September 13, 1983
    Assignee: Norddeutsche Affinerie AG
    Inventors: Hartmut Ploss, Jurgen Lehne
  • Patent number: 4369164
    Abstract: A process for leaching copper and arsenic from copper dross containing copper arsenide and separated from molten lead bullion comprises leaching the dross with an aqueous ammoniacal solution containing arsenate as the predominant anion under oxidizing conditions to obtain a leachate, removing copper from the leachate to obtain a raffinate and re-cycling raffinate to the leaching stage, and removing a bleed of raffinate from the circuit and precipitating a substantially insoluble arsenic compound from the raffinate bleed to remove arsenic from the circuit.
    Type: Grant
    Filed: December 4, 1981
    Date of Patent: January 18, 1983
    Assignees: Metallurgical Process Limited, I.S.C. Smelting Limited
    Inventor: Hayden Monk
  • Patent number: 4297134
    Abstract: A process for recovering gold from a raw material containing gold by treating the raw material with either aqua regia or hydrochloric acid to form chloroauric acid, extracting the chloroauric acid with an organic solvent and reducing the acid to precipitate gold for separation and recovery.
    Type: Grant
    Filed: July 3, 1980
    Date of Patent: October 27, 1981
    Inventor: Keita Yamada
  • Patent number: 4267069
    Abstract: A method of regenerating an activated carbon which has had its collecting capacity for gold adsorption reduced through use which includes the step of contacting the carbon with an aqueous copper salt solution having a pH of less than 6. The regeneration is improved if the solution contains carbonic acid or if the copper salt solution treatment is followed by treatment with a carbonate or bicarbonate solution.
    Type: Grant
    Filed: September 28, 1979
    Date of Patent: May 12, 1981
    Inventors: Raymond J. Davidson, Vittorio Veronese
  • Patent number: 4176160
    Abstract: Process for purifying an iron containing zinc sulfate solution which comprises precipitating iron from said solution as a slurry in at least one of the following forms at a pH which is maintained lower than 4: basic sulfate, jarosite or goethite; filtering said slurry on a planar horizontal filter and forming a cake on said planar filter; washing the cake directly on the planar filter with water supplied onto the cake without forming a newslurry with washing water and thus freeing the cake from water soluble zinc and copper compounds promptly before hydrolysis thereof insolubilizes said compounds as basic sulfates, whereby the solid residue in the cake does not contain substantially more insoluble zinc content than it contained in the slurry being fed to the filtration.
    Type: Grant
    Filed: March 6, 1978
    Date of Patent: November 27, 1979
    Assignee: Societe de Prayon
    Inventor: Engelhard Pavonet
  • Patent number: 4150091
    Abstract: The process of leaching manganiferous ocean nodule ores with HCl whereby the manganese and other metals present, such as iron, zinc, cobalt, nickel, copper, and like are converted from oxides, silicates or other insoluble forms to water soluble chlorides, and are thereafter separated, purified, and the manganese recovered as MnO.sub.2 by oxidation with chlorine to provide a material suitable for use in metallurgical applications, may be improved by controlling the chlorine pressure and the pH of the leaching reaction in order to first leach out the metals other than manganese; as chloride, and thereafter recovering the manganese in the form of its silicate, aluminate, oxide, or the like.
    Type: Grant
    Filed: November 25, 1977
    Date of Patent: April 17, 1979
    Assignee: Sun Ocean Ventures, Inc.
    Inventor: Henry J. Peterson
  • Patent number: 4123500
    Abstract: This invention relates to the recovery of precious metals. More particularly, the invention relates to a process for the recovery of a catalytic metal from a carbonaceous residue or support comprising subjecting an aqueous slurry of material containing catalytic metal to be recovered to a temperature of not less than 200.degree. C and a pressure not less than 75 atmospheres in an atmosphere comprising a quantity of oxygen at least sufficient to oxidize substantially all the carbon present, the oxidation being carried out in the presence of a liquid aqueous phase. The process also relates to the recovery of silver from photographic film.
    Type: Grant
    Filed: January 14, 1977
    Date of Patent: October 31, 1978
    Assignee: Johnson, Matthey & Co., Limited
    Inventors: Gary J. K. Acres, Alfred J. Bird
  • Patent number: 4123499
    Abstract: A method for selectively extracting metal values from manganese bearing ores such as marine nodules. The ore is initially leached to solubilize manganese and other desirable metals as nitrates. The resulting solution is then treated with manganous hydroxide to selectively precipitate metals such as copper, nickel and cobalt. The enriched mixture of metal hydroxides is separated from the manganese nitrate solution, which is decomposed to recover high purity MnO.sub.2.
    Type: Grant
    Filed: May 20, 1977
    Date of Patent: October 31, 1978
    Assignee: Chemetals Corporation
    Inventors: Jay Y. Welsh, Irving Sochol
  • Patent number: 4118221
    Abstract: Copper is separated from nickel present therewith in a sulfate solution by neutralizing to precipitate all the copper and some nickel as basic compounds, and thereafter reducing the copper in the basic compounds to elemental form through formation of cuprous sulfite and thermal dissociation of the latter.
    Type: Grant
    Filed: October 7, 1977
    Date of Patent: October 3, 1978
    Assignee: The International Nickel Company, Inc.
    Inventors: Victor Alexander Ettel, Eric August Pierre Devuyst
  • Patent number: 4065300
    Abstract: Cuprous oxide and finely divided metallic copper are recovered from copper bearing material by an improved chemical process involving the dissolving of the copper bearing material in a solution of ammonium nitrate having an excess of NO.sub.3.sup..dbd. ions to form a cupric ammonium complex which then collects additional copper ions to form a cuprous ammonium nitrate. The cuprous ammonium nitrate is then broken down chemically to cuprous oxide and finely divided metallic copper.
    Type: Grant
    Filed: June 28, 1976
    Date of Patent: December 27, 1977
    Inventor: Archie L. Poarch
  • Patent number: 4065542
    Abstract: A process which enables cumulative recovery of nonferrous metal values from manganiferous sea nodules and a limonitic ore comprises treating the limonitic ore in an aqueous acidic medium under reducing conditions to extract nonferrous metals and iron from the ore and form a solution containing ferrous iron and then leaching the sea nodules with such solution to extract nonferrous metals from the sea nodules and precipitate a predominant amount of the iron as hydrated ferric oxide.
    Type: Grant
    Filed: May 19, 1976
    Date of Patent: December 27, 1977
    Assignee: The International Nickel Company, Inc.
    Inventors: Kohur Nagaraja Subramanian, Gerald Vernon Glaum
  • Patent number: 4018866
    Abstract: A process in which copper, nickel, cobalt and molybdenum are recovered by direct leaching of comminuted raw manganese nodules after the nodules are reduced in a reduction circuit with an aqueous ammoniacal leach solution containing cuprous ions. An improvement is disclosed which results from recycling a portion of the metal values recovered back to the reduction circuit as a solid basic metal carbonate. The metal carbonate recycle enables the size of the reactors in the reduction circuit to be reduced. The recycle also increases the efficiency of the process by facilitating the solubilization of copper. Another aspect of the invention resides in the advantages of maintaining solubilized copper in amounts between 10 grams per liter and the solubility limit in the reduction circuit.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: April 19, 1977
    Assignee: Kennecott Copper Corporation
    Inventor: Lester J. Szabo
  • Patent number: 4007037
    Abstract: This invention resides in compositions and methods for chemically etching copper elements. The etching solution of this invention is composed of materials which can be easily regenerated and the copper metal etched from the copper element easily recovered. The etching solution is also of a type that is substantially self-sustaining.
    Type: Grant
    Filed: July 9, 1975
    Date of Patent: February 8, 1977
    Assignee: General Electric Company
    Inventors: Robert M. Lukes, Jeffrey C. Sellins
  • Patent number: 3996046
    Abstract: A method is provided for extracting silver from a silver sulfate-bearing substance, such as oxide materials, metal or metal sulfate mixtures containing silver sulfate which comprises subjecting said substance to aqueous leaching to remove soluble salts therefrom and leave a residue, taking the residue containing silver sulfate and other insoluble materials, such as insoluble salts, and forming a slurry with an aqueous solution of a metal sulfate, such as calcium nitrate, the amount of calcium nitrate being at least sufficient to effect metathetical exchange with the silver sulfate and form a silver nitrate solution containing substantially the silver originally present in the silver-sulfate bearing substance, and separating the silver nitrate solution from the residue remaining, and then purifying said solution, the silver being thereafter recovered from the silver nitrate solution by hydrolytic precipitation, electrowinning or other suitable means.
    Type: Grant
    Filed: July 25, 1975
    Date of Patent: December 7, 1976
    Assignee: Amax Inc.
    Inventors: James E. Hoffmann, Peter D. Parker, Andrew C. Sabo
  • Patent number: 3990891
    Abstract: This invention provides a process for obtaining the nonferrous metal values from a manganese oxide ore, by reacting the ore with an aluminum halide or a ferric halide at a temperature of at least about 50.degree. C and preferably, at least about 130.degree. C. The manganese oxide ore can be treated with or without reduction. If reduction of the manganese oxide ore is desired, it can be accomplished prior to, or simultaneously with, the reaction with the aluminum halide or ferric halide.The resulting nonferrous metal halides can be separated from the reacted ore residue by conventional methods such as leaching or evaporation.
    Type: Grant
    Filed: May 24, 1974
    Date of Patent: November 9, 1976
    Assignee: Deepsea Ventures, Inc.
    Inventors: Richard G. Sandberg, Paul H. Cardwell
  • Patent number: 3986866
    Abstract: A method is provided for recovering metal compounds and metals from ores, concentrates, alloys and other metal containing materials. The material containing said metals is leached in an aqueous solution of nitric acid at atmospheric pressure and temperatures which may vary from ambient to the atmospheric boiling point. An inorganic salt is admixed or formed in the solution to raise the atmospheric boiling point of said solution. The solution is heated to evaporate the water and to increase the concentration of the salt. The atmospheric boiling point of the solution increases with an increase in the salt concentration and causes an evolution of nitric acid or nitrogen containing gas and the sequential precipitation of metal compounds as the boiling point of the solution increases. The solution is filtered after each sequential precipitation to recover the metal compound or mixture of metal compounds which have precipitated as aforesaid.
    Type: Grant
    Filed: August 11, 1975
    Date of Patent: October 19, 1976
    Inventor: Lynn Wallace Coffer
  • Patent number: 3981962
    Abstract: Complex sulfide ores or concentrates are decomposed by treatment with a combination of chlorine and oxygen, the amount of chlorine being limited to that necessary to convert sulfides of the desired metals, such as zinc, lead, copper, cadmium, silver, nickel and cobalt to chlorides.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: September 21, 1976
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Gary A. Smyres, Philip R. Haskett, Bernard J. Scheiner, Roald E. Lindstrom
  • Patent number: 3979265
    Abstract: Sulfur monochloride is reacted with an ore containing iron, sulfur and a metal which forms a water soluble ammine complex or an ammonium-containing double salt, to yield metal chlorides and sulfur. The metal sought is solubilized with an aqueous solution containing ammonium ions to produce an aqueous solution of metal ammine complex or double salt and thereby separate such complex or salt from the iron and sulfur. The solution containing the sought metal values can then be subjected to electrowinning to recover the metal, or the metal can be precipitated as the metal oxide by the addition of sodium hydroxide. Sulfur and chlorine are recovered during the process and used to regenerate sulfur monochloride.
    Type: Grant
    Filed: December 19, 1974
    Date of Patent: September 7, 1976
    Assignee: Continental Oil Company
    Inventor: Anthony G. Fonseca
  • Patent number: 3971652
    Abstract: A method of leaching copper values from copper dross obtained from pyro-metallurgical lead bullion by contacting finely-divided particles of the copper dross with an aqueous ammoniacal solution, preferably a solution of ammonium carbonate and ammonium hydroxide, to dissolve copper from the dross. The leaching will usually be carried out in a gas containing free oxygen and the leaching solution may advantageously contain sulphate ions in addition to carbonate ions.
    Type: Grant
    Filed: March 28, 1975
    Date of Patent: July 27, 1976
    Assignee: Metallurgical Development Company
    Inventor: Joseph Lindsey Bryson, deceased
  • Patent number: 3970737
    Abstract: The invention provides a method of recovering transition or noble metal values, particularly gold and silver values, from a support having absorbed thereon the metal values in the form of an ionic complex, particularly a cyanide ionic complex, by desorbing the metal values with water of low cation concentration such as deionized or softened water. When the cation of the complex is an alkaline earth metal cation then the support is preferably subjected to a pre-treatment with an alkali metal salt solution to effect an exchange reaction before the desorption step.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: July 20, 1976
    Inventor: Raymond John Davidson
  • Patent number: 3967958
    Abstract: The invention is a process for winning nickel by treating an aqueous ammonium salt solution of nickel salts with a carbon monoxide-containing gas under reducing conditions to produce nickel carbonyl and subsequently recovering nickel therefrom. Optionally, the production of nickel carbonyl can be catalyzed, for example, by cyanide. Also, an essentially water-immiscible solvent for nickel carbonyl can optionally be employed. The aqueous ammoniacal solution is typically an aqueous ammoniacal ammonium chloride, carbonate, sulfate, hydroxide, or mixture thereof. The valuable metals associated with nickel, e.g., copper, cobalt, iron, and precious metals, are also separated and recovered by this process. The general nature of the process allows a wide variety of primary and secondary sources of nickel to be utilized by combining this process with a number of known ore-treatment steps.
    Type: Grant
    Filed: August 27, 1973
    Date of Patent: July 6, 1976
    Assignee: Ethyl Corporation
    Inventors: Thomas H. Coffield, Kestutis A. Keblys
  • Patent number: 3962402
    Abstract: A method is described for the oxidation-leaching of chalcopyrite concentrates at high temperatures and pressures for the extraction of copper values as copper sulfate in which temperatures are maintained between about 425.degree. and 450.degree.F, oxygen partial pressures of between about 50 and 200 psi are provided, and levels of acidity are permitted to increase above about 50 grams of H.sub.2 SO.sub.4 per liter in order to obtain maximum rates of extraction of virtually all of the copper. Thereafter, while maintaining the temperature and pressure at elevated levels, the acidity of the slurry is reduced to between about 10 and 40 grams of H.sub.2 SO.sub.4 per liter in order to obtain reduction of dissolved iron to optimal levels. The resulting slurry is then cooled and further processed for the production of a very pure copper sulfate solution.
    Type: Grant
    Filed: February 27, 1974
    Date of Patent: June 8, 1976
    Assignee: Freeport Minerals Company
    Inventor: Freddie J. Touro
  • Patent number: 3961908
    Abstract: A method and apparatus for high temperature-high pressure acid leaching of sulfide ores is described. The apparatus includes an autoclave having a plurality of pressurized compartments and a water removing-heat removing condenser. Means are described for the introduction of a neutralizing agent directly into the autoclave in order to maintain the acidity of the slurry at a level where substantially all of the iron present in the slurry will form an insoluble iron oxide precipitate. Means are described for removing the gaseous products resulting from the introduction of the neutralizing agent while avoiding contamination thereby of a substantial portion of the oxygen.
    Type: Grant
    Filed: February 27, 1974
    Date of Patent: June 8, 1976
    Assignee: Freeport Minerals Company
    Inventor: Freddie J. Touro