Forming Insoluble Substance In Liquid Patents (Class 423/140)
  • Patent number: 10487374
    Abstract: Described is a method of recovering a metal from a substrate having a metal sulphide, metal oxide, or combination thereof, by contacting the substrate with an aqueous oxidant to oxidize the metal sulphide to elemental sulphur and oxidized metal or convert the complex metal oxide to a metal salt, contacting the oxidized metal or simple metal oxide with ammonium hydroxide to form soluble a ammine complex of the metal to obtain a leachate and residual solids; separating the leachate from the residual solids; and recovering the metal.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: November 26, 2019
    Assignee: Yava Technologies Inc.
    Inventor: Madhav Dahal
  • Patent number: 10301705
    Abstract: A method for recovering Vanadium from a secondary source such as fly ash. Leaching is involved using single or combined acids such as hydrochloric and sulfuric in a temperature range of 20° C. and 100° C. The leaching is performed in sequential operations with recovery of Vanadium in the range of 92%. The recovered Vanadium can be formulated into an electrolyte for redox batteries.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: May 28, 2019
    Assignee: Energy, Science and Technology Corporation
    Inventors: Kourosh Khaje, Maryam Mkhani
  • Patent number: 10280481
    Abstract: A bioleaching and solvent extraction process with selective recovery of copper and zinc from polymetallic sulphide concentrates is described, comprising a bioleaching and ferric ion reducing process and a copper and zinc solvent extraction process. The bioleaching and ferric ion reducing process comprises a concentrates pulp conditioning step; a bioleaching step, wherein once the pulp is conditioned it is subjected to a bioleaching process using a plurality of bioreactors of the stirred-tank type with an air injection and diffusion system, which allows handling of a pulp density higher than 15%; a step of solid separation from a solution rich in metallic ions from the bioleaching step; and, a ferric ion reduction step, wherein the pulp from the previous step is subjected to a transformation step of ferric ions into ferrous ions.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: May 7, 2019
    Assignee: SERVICIOS CONDUMEX S.A. DE C.V.
    Inventors: Belisario Sanchez-Vazquez, Francisco Estrada-De Los Santos, Alfonso Lopez-Juarez, Eric David Buendia-Cachu, Ulises Monter-Valenzuela
  • Patent number: 10125408
    Abstract: Provided is a method for manufacturing a nickel and cobalt mixed sulfide that is capable of stabilizing nickel and cobalt concentrations in the sulfidation end solution at low levels and of limiting decreases in nickel and cobalt recovery rates without increasing cost even when processing with a sulfuric acid acidic solution containing nickel and cobalt and a high iron ions concentration as the sulfidation start solution. This method generates a sulfidation reaction by blowing hydrogen sulfide gas into a sulfuric acid acidic solution comprising nickel and cobalt to obtain a mixed sulfide, wherein: the sulfuric acid acidic solution, which is the sulfidation start solution, contains iron ions at a rate of 1.0-4.0 g/L; and the sulfidation reaction is generated by blowing hydrogen sulfide gas into the sulfidation start solution and adding sodium hydrogensulfide (NaHS) obtained by absorbing hydrogen sulfide gas-containing exhaust gas, generated by the sulfidation, in an alkaline solution.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: November 13, 2018
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Tomoaki Yoneyama, Hiroyuki Mitsui, Manabu Enomoto
  • Patent number: 10125025
    Abstract: There is provided a method for producing (high purity) hematite for ironmaking, in a process where a mineral acid and an oxidizing agent are added to an ore containing iron and a valuable metal and then the valuable metal is leached under high temperatures and high pressures, comprises the steps of: (1) a high pressure leach step; (2) a preliminary neutralization step; (3) a solid-liquid separation step 1; (4) a neutralization step 1; (5) a neutralization step 2; (6) a solid-liquid separation step 3; (7) seed crystal addition treatment; (8) a solid-liquid separation step 2; and (9) a firing step.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: November 13, 2018
    Assignee: Sumitomo Metal Mining Co. Ltd.
    Inventors: Go Ohara, Yasumasa Kan, Masaki Imamura
  • Patent number: 10017835
    Abstract: Provided is a method for producing nickel sulfide from an acidic sulfuric acid solution containing nickel, which is capable of suppressing particle diameters of nickel sulfide obtained thereby. The present invention is a method for producing nickel sulfide by causing a sulfurization reaction by blowing a hydrogen sulfide gas into an acidic sulfuric acid solution containing nickel, wherein: nickel sulfide having particle diameters of 5-20 ?m and serving as seed crystals is added into an acidic sulfuric acid solution having a nickel concentration of 0.5-5.0 g/L in an amount of 40-500% by mass relative to the amount of nickel contained in the acidic sulfuric acid solution; and a hydrogen sulfide gas is blown into the acidic sulfuric acid solution, into which the seed crystals have been added, while setting the amount of the hydrogen sulfide gas blown in to be within the range of 0.30-0.85 Nm3/kg-Ni.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: July 10, 2018
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Shinichiro Nakamura, Osamu Nakai, Hiroyuki Mitsui, Keisuke Shibayama
  • Patent number: 9945007
    Abstract: The present invention provides a hydrometallurgical method for nickel oxide ore, wherein the plant can be smoothly started up without imposing a load onto a filter cloth for a separation treatment of zinc sulfide, and the amount of residual zinc in a mother liquor for nickel recovery can be reduced to 1 mg/L. In the plant start-up after the completion of a periodic inspection, a post-neutralization solution is controlled to return to a neutralization reaction tank via circulation piping by adjustment of a switching valve in flow piping without sulfurizing post-neutralization solution. When the flow rate and/or the temperature of the post-neutralization solution circulated reaches a predetermined value, a sulfurization treatment is applied to the post-neutralization solution in the dezincification reaction tank to form zinc-sulfide-containing mother liquor for nickel recovery and adjust the switching valve.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: April 17, 2018
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroyuki Mitsui, Osamu Nakai, Satoshi Matsubara
  • Patent number: 9914700
    Abstract: Disclosed herein are methods for recovering phosphorus-containing ligand from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the phosphorus-containing ligand.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: March 13, 2018
    Assignee: INVISTA NORTH AMERICA S.A R.L.
    Inventor: William J. Tenn, III
  • Patent number: 9902624
    Abstract: A preparation method for a composite ferrate reagent. 1, Weigh raw materials; 2, evenly mix a ferric salt, an activating agent and an alkali maintaining agent and heat the mixture; 3, add an oxidant solution; and 4, cool and mix the solution with water. The technical problems of high energy consumption, low yield and poor ferrate product stability of the existing method for preparing ferrate are solved. The obtained product can be stably stored, and the yield of the ferrate reaches 60% to 95%.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: February 27, 2018
    Inventors: Jun Ma, Yulei Liu, Lu Wang, Xiaodan Zhao, Qingliang Liu
  • Patent number: 9677155
    Abstract: The invention provides a method for recovering scandium from scandium-containing intermediate products, formed during hydrometallurgical processing of scandium-containing feed materials, including: (a) leaching of the scandium-containing intermediate products with a suitable acid at a controlled pH selected to maximize scandium extraction and minimize the co-extraction of impurities, (b) solid/liquid separation, to obtain a scandium-containing leach solution; (c) selective precipitation of the scandium at a controlled pH from the scandium-containing leach solution using a suitable base, (d) solid/liquid separation, to obtain an upgraded scandium concentrate and a barren solution for return to the hydrometallurgical process. A further upgraded scandium concentrate can be obtained by (e) alkaline leaching of the upgraded scandium concentrate for additional removal of impurities, and (f) solid/liquid separation to obtain a further upgraded scandium concentrate and impurities-containing base solution.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: June 13, 2017
    Assignee: VALE S.A.
    Inventors: Indje Mihaylov, Ryan Peterson, Avinash Singhal, Christopher Massey
  • Patent number: 9653732
    Abstract: A process for producing a phosphate by: introducing oxidic metal(II)-, metal(III)- metal(IV) or compounds with mixed oxide stages selected from hydroxides, oxides, oxide-hydroxides, oxide-hydrates, carbonates and hydroxide carbonates, of at least one of the metals Mn, Fe, Co and Ni with the elemental forms or alloys of at least one of the metals Mn, Fe, Co and/or Ni into an aqueous medium containing phosphoric acid, and reacting the oxidic metal compounds with elemental forms or alloys of the metals to obtain divalent metal ions, removing solid substances, producing an alkali metal phosphate receiver solution with a pH-value of 5 to 8 and metering the aqueous solution into the receiver solution and at the same time metering a basic aqueous alkali hydroxide solution that the pH-value of the resulting reaction mixture is kept in the region of 5 to 8 to precipitate the desired phosphate.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: May 16, 2017
    Assignee: Chemische Fabrik Budenheim KG
    Inventors: Gunnar Buehler, Christian Graf, Andreas Jazdanian, Kilian Schwarz, Michael Rapphahn
  • Patent number: 9561972
    Abstract: The present invention aims at providing a method for effluent treatment, which enables the separation and recovery of a high-density and high-concentration aluminum sediment from waste water that is discharged in the smelting of a nickel oxide ore and contains aluminum ions. In the present invention, an alkali and an iron-containing solid are added to waste water containing aluminum ions to form a slurry, and the slurry is allowed to stand to perform solid-liquid separation, whereby an aluminum sediment and an effluent is formed.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: February 7, 2017
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Yasuo Yoshii, Keisuke Shibayama, Yoji Kyoda, Yoshitomo Ozaki, Osamu Nakai, Hiroyuki Mitsui
  • Patent number: 9343738
    Abstract: An active electrode material for electrochemical devices such as lithium ion batteries includes a lithium transition metal oxide which is free of sodium and sulfur contaminants. The lithium transition metal oxide is prepared by calcining a mixture of a lithium precursor and a transition metal oxalate. Electrochemical devices use such active electrodes.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: May 17, 2016
    Assignee: UCHICAGO ARGONNE, LLC
    Inventors: Ilias Belharouak, Khalil Amine
  • Patent number: 9315393
    Abstract: A hydrogen chloride removal process includes (i) contacting in a reactor an aqueous solution, which includes one or more Fe2+-compounds, with a fluid, which includes an oxidizing agent, hydrochloric acid gas and optionally chlorine gas; and (ii) oxidizing the Fe2+-compounds to Fe3+-compounds, thereby converting the fluid to an exhaust gas, which has a reduced hydrochloric acid content.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: April 19, 2016
    Assignee: Tessenderlo Chemie NV
    Inventor: Rudy Peeters
  • Patent number: 9057116
    Abstract: The invention relates to the hydrometallurgical treatment of laterite ores in order to recover valuable metals. More specifically, the invention presented relates to a method for improving precipitation and solid-liquid separation in conjunction with the leaching of laterite ores. According to the method the slurry exiting the leaching of laterite ores is neutralized, after which part of the slurry is routed to solid-liquid separation. Iron is precipitated from the solid-liquid separation overflow by neutralizing the solution and the solution that is formed, which includes jarosite seeds, is routed to an appropriate point in the process to control the precipitation of iron and to enhance the filterability of the solids.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: June 16, 2015
    Assignee: OUTOTEC OYJ
    Inventors: Teppo Riihimäki, Jaakko Leppinen, Mikko Ruonala, Liisa Haavanlammi
  • Patent number: 9028710
    Abstract: The invention is directed to a pulverulent compound of the formula NiaM1bM2cOx(OH)y where M1 is at least one element selected from the group consisting of Fe, Co, Zn, Cu and mixtures thereof, M2 is at least one element selected from the group consisting of Mn, Al, Cr, B, Mg, Ca, Sr, Ba, Si and mixtures thereof, 0.3?a?0.83, 0.1?b?0.5, 0.01?c?0.5, 0.01?x?0.99 and 1.01?y?1.99, wherein the ratio of tapped density measured in accordance with ASTM B 527 to the D50 of the particle size distribution measured in accordance with ASTM B 822 is at least 0.2 g/cm3·?m. The invention is also directed to a method for the production of the pulverulent compound and the use as a precursor material for producing lithium compounds for use in lithium secondary batteries.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: May 12, 2015
    Assignee: H.C. Starck GmbH
    Inventors: Matthias Jahn, Gerd Maikowske, Stefan Malcus, Juliane Meese-Marktscheffel, Armin Olbrich, Rüdiger Zertani
  • Patent number: 8974754
    Abstract: The method for obtaining an acid solution containing nickel is obtained by treating a positive electrode material of a nickel-metal hydride battery. The method includes a water-washing step, wherein a positive electrode material of a nickel-metal hydride battery is water-washed by adding water, and then separated to form a positive electrode material after water-washing and a water-washed slurry. An acid-washing step then is performed, wherein an acid is added and mixed into the positive electrode material obtained after water-washing in the water-washing step, and, separation is performed to form a positive electrode material after acid-washing and an acid-washed slurry. A dissolution step is performed wherein the positive electrode material obtained in the acid-washing step is separated into a nickel solution and a dissolution residue by adding any one of an acid and an oxidizing agent.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: March 10, 2015
    Assignee: Sumitomo Metal Mining Co. Ltd.
    Inventors: Naoko Kikuta, Satoshi Asano, Masatoshi Takano
  • Publication number: 20150023850
    Abstract: A method for improving the filterability in separating a zinc sulfide, produced by applying sulfurization treatment to a post-neutralization solution containing zinc together with nickel and cobalt in a dezincification step in a hydrometallurgical process for nickel oxide ore. The method includes a neutralization reaction step of neutralizing leachate in a neutralization tank, a separation step of separating neutralized slurry into a neutralized sediment and a post-neutralization solution by adding flocculant to the neutralized slurry, a measuring step of measuring the viscosity of the post-neutralization solution, a step of storing the post-neutralization solution in a storage tank, and a transfer step of transferring the stored post-neutralization solution to a dezincification reaction tank used in a dezincification step subsequent to a neutralization step.
    Type: Application
    Filed: March 6, 2013
    Publication date: January 22, 2015
    Applicant: SUMITOMO METAL MINING Co., Ltd
    Inventors: Hiroyuki Mitsui, Osamu Nakai, Satoshi Matsubara
  • Publication number: 20150023851
    Abstract: Provided is a method for producing hematite for ironmaking, wherein high purity hematite, which can be used as an iron-making raw material, is cheaply and efficiently recovered from a leach residue containing iron oxide produced by a high pressure acid leach (HPAL) process. This method for producing (high purity) hematite for ironmaking in a process of adding a mineral acid and an oxidant to ore containing iron and valuable metals and then leaching the valuable metals under high pressure and high temperature includes (1) a neutralization step of adding a neutralizer to a leachate obtained under high pressure and high temperature to form a leach slurry, (2) a solid-liquid separation step of separating the leach slurry obtained in the neutralization step (1) into a leach residue and the leachate, and (3) a classification step of classifying the leach residue into the hematite and gangue components.
    Type: Application
    Filed: January 16, 2013
    Publication date: January 22, 2015
    Inventors: Hideki Sasaki, Yoshitomo Ozaki, Manabu Enomoto, Hirofumi Shouji, Tatsuya Higaki, Hiroyuki Mitsui, Yasumasa Kan
  • Publication number: 20150023849
    Abstract: The present invention provides a hydrometallurgical method for nickel oxide ore, wherein the plant can be smoothly started up without imposing a load onto a filter cloth for a separation treatment of zinc sulfide, and the amount of residual zinc in a mother liquor for nickel recovery can be reduced to 1 mg/L. In the plant start-up after the completion of a periodic inspection, a post-neutralization solution is controlled to return to a neutralization reaction tank via circulation piping by adjustment of a switching valve in flow piping without sulfurizing post-neutralization solution. When the flow rate and/or the temperature of the post-neutralization solution circulated reaches a predetermined value, a sulfurization treatment is applied to the post-neutralization solution in the dezincification reaction tank to form zinc-sulfide-containing mother liquor for nickel recovery and adjust the switching valve.
    Type: Application
    Filed: March 1, 2013
    Publication date: January 22, 2015
    Inventors: Hiroyuki Mitsui, Osamu Nakai, Satoshi Matsubara
  • Publication number: 20150000466
    Abstract: A process for the production of a high grade nickel product including the steps of: a) providing at least one heap of a nickeliferous lateritic ore and leaching that heap with a suitable lixiviant, preferably sulfuric acid solution, to produce a nickel rich pregnant leach solution (PLS); b) subjecting the PLS to an impurity removal step to precipitate ferric iron, and preferably partially precipitate aluminium and chromium as hydroxides; and c) recovering a high grade nickel product from the PLS preferably by either nickel ion exchange, solvent extraction, electrowinning, conventional multi-stage neutralization, pyrohydrolysis or sulfidation.
    Type: Application
    Filed: February 13, 2013
    Publication date: January 1, 2015
    Applicant: BHP BILLITON SSM DEVELOPMENT PTY LTD
    Inventors: Houyuan Liu, Omar Yesid Caceres Hernandez, Renato Antonio Loaiza Aguilar, Carolina Isabel Meneses Rodriguez, Ruben Rangel De Hoyos, Illich Alvarez Mercado
  • Patent number: 8920773
    Abstract: Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, leaching the roasted metal hearing material in a basic medium to yield a pregnant leach solution, conditioning the pregnant leach solution to thrill a preprocessed metal bearing material; and leaching the preprocessed metal bearing material in acid medium.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: December 30, 2014
    Assignee: Freeport Minerals Corporation
    Inventors: Joanna M. Robertson, Thomas R. Bolles, Wayne W. Hazen, Lawrence D. May, Jay C. Smith, David R. Baughman
  • Patent number: 8916115
    Abstract: A nickel recovery loss reduction method that makes it possible to reduce nickel recovery loss by lowering the concentration of fine floating solid components in overflow liquid in precipitating and separating treatments, and consequently to further reduce a nickel recovery loss, a hydrometallurgical method for nickel oxidized ore to which the nickel recovery loss reduction method is applied, and a sulfurizing treatment system. The present invention is a nickel recovery loss reduction method in a sulfurizing step for blowing hydrogen sulfide gas into a nickel containing sulfuric acid aqueous solution to generate nickel-containing sulfides and a barren liquid, and the nickel-containing sulfides with the average particle size adjusted to a predetermined size or larger are added as seed crystals to the sulfuric acid aqueous solution. It is more preferable to adjust the average particle size of the nickel sulfides to be added as seed crystals to 55 ?m or more.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: December 23, 2014
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Satoshi Matsubara, Osamu Nakai, Hiroyuki Mitsui
  • Publication number: 20140369904
    Abstract: There are provided processes for preparing alumina. These processes can comprise leaching an aluminum-containing material with HCl so as to obtain a leachate comprising aluminum ions and a solid, and separating said solid from said leachate; reacting said leachate with HCl so as to obtain a liquid and a precipitate comprising said aluminum ions in the form of AlCl3, and separating said precipitate from said liquid; and heating said precipitate under conditions effective for converting AlCl3 into Al2O3 and optionally recovering gaseous HCl so-produced. These processes can also be used for preparing various other products such as hematite, MgO, silica and oxides of various metals, sulphates and chlorides of various metals, as well as rare earth elements, rare metals and aluminum.
    Type: Application
    Filed: September 17, 2012
    Publication date: December 18, 2014
    Inventors: Richard Boudreault, Joeel Fournier, Denis Primeau, Marie-Maxime Labrecque-Gilbert
  • Patent number: 8888892
    Abstract: A method for separating nickel, cobalt and a rare earth element from a material containing positive and negative electrode active materials of a nickel-metal hydride battery includes mixing a material containing positive and negative electrode active materials with a sulfuric acid solution and dissolving therein, and then separating a leachate from a residue; adding an alkali metal sulfate to the leachate to obtain a mixed precipitate of double sulfate of rare earth elements, and a rare-earth-element-free solution; and adding a sulfurizing agent to the rare-earth-element-free solution to separate a nickel and cobalt sulfide raw material and a residual solution.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: November 18, 2014
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Naoko Kikuta, Satoshi Asano, Masatoshi Takano
  • Publication number: 20140308183
    Abstract: The method for obtaining an acid solution containing nickel is obtained by treating a positive electrode material of a nickel-metal hydride battery. The method includes a water-washing step, wherein a positive electrode material of a nickel-metal hydride battery is water-washed by adding water, and then separated to form a positive electrode material after water-washing and a water-washed slurry. An acid-washing step then is performed, wherein an acid is added and mixed into the positive electrode material obtained after water-washing in the water-washing step, and, separation is performed to form a positive electrode material after acid-washing and an acid-washed slurry. A dissolution step is performed wherein the positive electrode material obtained in the acid-washing step is separated into a nickel solution and a dissolution residue by adding any one of an acid and an oxidizing agent.
    Type: Application
    Filed: November 22, 2011
    Publication date: October 16, 2014
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Naoko Kikuta, Satoshi Asano, Masatoshi Takano
  • Publication number: 20140308182
    Abstract: A method for concentrating metal chlorides in and separating same from an iron(III) chloride-containing hydrochloric acid solution is described, wherein iron is precipitated from the solution as iron oxide, preferably haematite and filtered off in a filtration device, and the now further concentrated non-hydrolysable metal chlorides are removed from at least a part of the hydrochloric acid filtrate.
    Type: Application
    Filed: December 12, 2012
    Publication date: October 16, 2014
    Applicant: SMS SIEMAG PROCESS TECHNOLOGIES GMBH
    Inventors: Herbert Weissenbaeck, Dieter Vogl
  • Publication number: 20140301920
    Abstract: There are provided methods for preparing hematite. For example, the method can comprise reacting a basic aqueous composition comprising the iron and the aluminum with hematite under conditions suitable for at least partially converting the iron into hematite under the form of a precipitate, thereby obtaining a liquid phase and a solid phase; and separating the liquid phase from the solid phase.
    Type: Application
    Filed: June 4, 2012
    Publication date: October 9, 2014
    Applicant: ORBITE ALUMINAE INC.
    Inventors: Richard Boudreault, Joël Fournier, Laury Gauthier
  • Publication number: 20140286840
    Abstract: The present invention refers to a method being easy to recover metals including nickel and aluminum from waste aluminum catalysts, thereby entirely promoting the recovering rate. Said method comprises: preparing and roasting a waste aluminum catalyst with sodium salts, and then obtaining a first solution comprising vanadium and molybdenum, and a dreg comprising nickel and aluminum through leaching and filtrating; collecting and mixing the dreg with alkali powders to obtain a mixture of the dreg and alkali powders, roasting the mixture at 300 to 1000° C. with aluminum in the dreg reacting with hydroxyl generated from the roasting of mixture and further generating aluminum hydroxide, and then obtaining a second solution comprising aluminum and a concentrate having nickel through another leaching and filtrating; and recovering aluminum from the second solution and recovering nickel from the concentrate.
    Type: Application
    Filed: May 7, 2013
    Publication date: September 25, 2014
    Inventor: Ping-Tao WU
  • Publication number: 20140286841
    Abstract: There are provided methods for separating iron ions from aluminum ions contained in an acidic composition. The methods comprise reacting the acidic composition with a basic aqueous composition having a pH of at least 10.5 so as to obtain a precipitation composition, maintaining the precipitation composition at a pH above 10.5 so as to cause precipitation of the iron ions, at least substantially preventing precipitation of the aluminum ions, and to obtain a mixture comprising a liquid portion and a solid portion; and separating the liquid portion from the solid portion. There are also provided methods for treating an acidic composition comprising iron ions and aluminum ions. Such methods can be useful for preparing products such as alumina, aluminum, hematite etc.
    Type: Application
    Filed: July 18, 2012
    Publication date: September 25, 2014
    Applicant: ORBITE ALUMINAE INC.
    Inventors: Richard Boudreault, Joël Fournier, Laury Gauthier
  • Publication number: 20140264185
    Abstract: The present invention relates to a method for recycling LiFePO4, which is an olivine-based cathode material for a lithium secondary battery. The present invention is characterized in that a cathode material including LiFePO4 is synthesized using, as precursors, amorphous FePO4.XH2O and crystalline FePO4.2H2O (metastrengite) obtained by chemically treating LiFePO4 as an olivine-based cathode material for a lithium secondary battery, which is produced from a waste battery. Since a cathode fabricated from the LiFePO4 cathode material synthesized according to the present invention does not deteriorate the capacity, output characteristics, cycle efficiency and performance of the secondary battery and the cathode material of the lithium secondary battery may be recycled, the secondary battery is economically efficient.
    Type: Application
    Filed: July 17, 2013
    Publication date: September 18, 2014
    Inventors: Hyung Sun KIM, Byung Won CHO, Hwa Young LEE, Eun Jung SHIN, Soo KIM, Kyung Yoon CHUNG
  • Publication number: 20140262817
    Abstract: Various embodiments provide a method comprising leaching a cobalt bearing material to form a slurry, filtering the slurry to yield solids and a cobalt bearing liquid phase, and forwarding the solids to a second leaching operation.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: FREEPORT-MCMORAN CORPORATION
    Inventors: Nitin Goel, Ari Gabriel Partanen, Wayne W. Hazen, Phil Rooke
  • Patent number: 8815186
    Abstract: Nickel compositions for use in manufacturing nickel metal compositions, and specifically to methods of making basic nickel carbonates used to produce nickel metal compositions are disclosed. By varying the molar ratios of carbonates and bicarbonates to nickel salts, the methods provide basic nickel carbonates that produce superior nickel-containing solids that react more effectively with phosphorous-containing ligands. The phosphorous containing ligands can be both monodentate and bidentate phosphorous-containing ligands.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: August 26, 2014
    Assignee: INVISTA North America S.a.r.l.
    Inventor: John J. Ostermaier
  • Patent number: 8808660
    Abstract: The present invention relates to a method of precipitation of metal ions. Mineral(s), oxide(s), hydroxide(s) of magnesium and/or calcium are adopted as raw materials, and the raw material(s) is processed through at least one step of calcination, slaking, or carbonization to produce aqueous solution(s) of magnesium bicarbonate and/or calcium bicarbonate, and then the solution(s) is used as precipitant(s) to deposit rare earth, such as nickel, cobalt, iron, aluminum, gallium, indium, manganese, cadmium, zirconium, hafnium, strontium, barium, copper and zinc ions. And at least one of metal carbonates, hydroxides or basic carbonates is obtained, or furthermore the obtained products are calcined to produce metal oxides. The invention takes the cheap calcium and/or magnesium minerals or their oxides, hydroxides with low purity as raw materials to instead common precipitants such as ammonium bicarbonate and sodium carbonate etc.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: August 19, 2014
    Assignee: Grirem Advanced Materials Co., Ltd.
    Inventors: Xiaowei Huang, Zhiqi Long, Hongwei Li, Dali Cui, Xinlin Peng, Guilin Yang, Yongke Hou, Chunmei Wang, Shunli Zhang
  • Patent number: 8802042
    Abstract: A method for recovering base metal values from oxide ore is provided, where the ore includes a first group metal selected from nickel, cobalt and copper. The method includes reducing ore particle size to suit the latter unit operation, favoring contact for the metal elements, contacting the ore with ferric or ferrous chloride, hydrated or anhydrous, to produce a mix of ore and iron (II or III) chloride subjecting the mixture of the ore and ferric or ferrous chloride to enough energy to decompose the chlorides into hydrochloric acid and a iron oxides from the second group, forming their respective chlorides, selectively dissolve the produced base metal chlorides, leaving the metal as oxides and in the solid state, and recovering the dissolved base metal values from aqueous solution.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: August 12, 2014
    Assignee: Vale S.A.
    Inventors: Antonio Clareti Pereira, Tiago Valentim Berni
  • Patent number: 8802041
    Abstract: There is provided a process for decontaminating and converting volumetrically contaminated radioactive metals, especially nickel, and recovering a decontaminated metal hydroxide or metal carbonate. The process includes the use of hydrogen peroxide to oxidize and remove nucleotides.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: August 12, 2014
    Assignee: Toxco, Inc.
    Inventors: W. Novis Smith, David S. Eaker
  • Patent number: 8790516
    Abstract: The invention relates to a method for removing arsenic as scorodite from solutions that contain iron and arsenic. In accordance with the method, arsenic is first precipitated as ferric arsenate and subsequently processed hydrothermally into crystalline scorodite.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: July 29, 2014
    Assignee: Outotec Oyj
    Inventors: Mikko Ruonala, Jaakko Leppinen, Ville Miettinen
  • Patent number: 8758479
    Abstract: A process is described for the recovery of nickel and/or cobalt from laterite or partially oxidized lateritic ores having a substantial proportion of the iron present in the ferrous state. The process includes providing a laterite or partially oxidized laterite ore wherein a substantial proportion of the iron present in the ore is in the ferrous state; acid leaching the ore to provide a product leach solution containing at least ferrous iron, nickel and cobalt together with acid soluble impurities; and recovering the nickel and cobalt from the product leach solution with a selective ion exchange resin in an ion exchange process leaving the ferrous iron and other acid soluble impurities in the raffinate.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: June 24, 2014
    Assignee: BHP Billiton SSM Development Pty Ltd
    Inventors: Omar Yesid Caceres Hernandez, Harald Muller, Graham Reynolds, Houyuan Liu
  • Publication number: 20140170040
    Abstract: A nickel recovery loss reduction method that makes it possible to reduce nickel recovery loss by lowering the concentration of fine floating solid components in overflow liquid in precipitating and separating treatments, and consequently to further reduce a nickel recovery loss, a hydrometallurgical method for nickel oxidized ore to which the nickel recovery loss reduction method is applied, and a sulfurizing treatment system. The present invention is a nickel recovery loss reduction method in a sulfurizing step for blowing hydrogen sulfide gas into a nickel containing sulfuric acid aqueous solution to generate nickel-containing sulfides and a barren liquid, and the nickel-containing sulfides with the average particle size adjusted to a predetermined size or larger are added as seed crystals to the sulfuric acid aqueous solution. It is more preferable to adjust the average particle size of the nickel sulfides to be added as seed crystals to 55 ?m or more.
    Type: Application
    Filed: August 9, 2012
    Publication date: June 19, 2014
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Satoshi Matsubara, Osamu Nakai, Hiroyuki Mitsui
  • Patent number: 8747678
    Abstract: The invention provides hydrometallurgical processes by which dissolved nickel may be removed from water at ambient temperature and low system pressure.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: June 10, 2014
    Assignee: Bioteq Environmental Technologies Inc.
    Inventors: Michael Bratty, Rick Lawrence, David Kratochvil
  • Patent number: 8668761
    Abstract: A process for processing metallurgic residue that is obtained from electric steelworks dust, ESD, essentially containing iron and zinc in the form of zinc oxide and zinc ferrites, as well as a processing of the blast-furnace slags, BFS, and a combination with a synergy effect.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: March 11, 2014
    Assignee: VB2M
    Inventors: Eric Marcadier, Laurent Rizet, Valerie Bouclier
  • Patent number: 8652427
    Abstract: Method for preparing material containing amorphous iron oxide hydroxide, the method including: mixing an aqueous ferrous salt solution and hydroxide solution or solid hydroxides at the temperature of below 70° C., filtering the reaction solution, washing the filter cake, preparing suspension solution of the filter cake, blowing an oxygen-containing gas into the suspension solution to oxidize the ferrous iron, and then filtering and drying. The material after being used as desulfurization agent can be repeatedly regenerated through oxidation in an oxygen-containing gas. A desulfurization agent, and methods for preparation and repeated regeneration thereof. The desulfurization agent contains the material and organic binders, and may also include a small amount of additives. The organic binders are selected from sodium carboxymethyl cellulose, sesbania powder, and cellulose powder, and the additives are selected from sawdust, rice husk power, and bran.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: February 18, 2014
    Assignee: Beijing Sanju Environmental Protection and New Material Co., Ltd.
    Inventors: Zhenyi Liu, Yongsheng Yu, Ke Lin
  • Patent number: 8647600
    Abstract: Methods for preparing a composition containing amorphous iron oxide hydroxide. Methods for regeneration of the amorphous iron oxide hydroxide after it has been used as desulfurizer. Regenerable desulfurizer with high sulfur capacity containing amorphous iron oxide hydroxide, not less than 88% w/w, and organic binder not less than 7% w/w. The organic binder is sodium carboxymethylcellulose, sesbania powder, cellulose powder, or a mixture thereof. A method for preparing the desulfurizer. A method for regenerating the waste agent produced after the desulfurizer and the composition containing the desulfurizer are used as desulfurizer. This method allows the desulfurizer and the composition containing the desulfurizer to be regenerated and reused avoiding the need for landfill disposal and environmental pollution.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: February 11, 2014
    Assignee: Beijing Sanju Environmental Protection and New Material Co., Ltd.
    Inventors: Zhenyi Liu, Ke Lin, Qunyang Gao
  • Patent number: 8628740
    Abstract: A method of processing waste iron chloride solution including ferrous chloride, ferric chloride or mixtures thereof and optionally free hydrochloric acid, includes concentrating waste iron chloride solution into concentrated liquid having iron chloride concentration of at least 30%-40% by weight; optionally oxidizing ferrous chloride in the concentrated liquid from the concentration step to ferric chloride providing liquid containing ferric chloride; hydrolyzing the liquid containing ferric chloride from the oxidation step at 155-350° C.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: January 14, 2014
    Assignee: SMS Siemag Aktiengesellschaft
    Inventors: Nobuyoshi Takahashi, Osama Taki, Herbert Weissenbaeck, Dieter Vogl
  • Patent number: 8609056
    Abstract: Iron(III) orthophosphate of the general formula FePO4×nH2O (n?2.5), prepared by a process in which iron(II)-, iron(III)- or mixed iron(II, III) compounds selected from among hydroxides, oxides, oxidehydroxides, oxide hydrates, carbonates and hydroxidecarbonates are reacted with phosphoric acid having a concentration in the range from 5% to 50%, any iron(II) present after the reaction is converted into iron(III) by addition of an oxidant and solid iron(III) orthophosphate is separated off from the reaction mixture.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: December 17, 2013
    Assignee: Chemische Fabrik Budenheim KG
    Inventors: Ruediger Wissemborski, Gunnar Buehler, Joachim Markmann, David Kuemmet
  • Patent number: 8603420
    Abstract: The invention enables processing waste sludge after galvanic treatment of metals, and particularly recycling spent pickling acids after pickling. Provided is an environmentally friendly process, which yields acids for reuse, and pure nano-sized iron pigments as a side product.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: December 10, 2013
    Assignee: Green Future Ltd.
    Inventors: Vladimir Boiko, Reuben Schapiro
  • Patent number: 8597600
    Abstract: There are provided processes for extracting aluminum ions from aluminous ores and for preparing alumina. Such processes can be used with various types of aluminous ores such as aluminous ores comprising, for example, various types of metals such as Fe, K, Mg, Na, Ca, Mn, Ba, Zn, Li, Sr, V, Ni, Cr, Pb, Cu, Co, Sb, As, B, Sn, Be, Mo, or mixtures thereof.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: December 3, 2013
    Assignee: Orbite Aluminae Inc.
    Inventors: Richard Boudreault, Serge Alex, Fabienne Biasotto
  • Patent number: 8585993
    Abstract: Methods for regenerating amorphous iron oxide hydroxide after being used as desulfurizer by (1) grinding a waste mixture into waste powder, wherein the waste mixture results from use of the composition comprising amorphous iron oxide hydroxide as desulfurizer; (2) preparing the waste powder into a suspension and charging the suspension with a gas containing oxygen to obtain a slurry comprising amorphous iron oxide hydroxide and elemental sulfur; and (3) placing the slurry or a solid resulting from filtering the slurry into a container and charging the slurry or the solid with air so that the elemental sulfur floats and the amorphous iron oxide hydroxide precipitates.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: November 19, 2013
    Assignee: Beijing Sanju Enviromental Protection and New Material Co., Ltd.
    Inventors: Zhenyi Liu, Fengren Liu, Ke Lin
  • Patent number: 8580213
    Abstract: A method for recovering nickel from sulfuric acid aqueous solution, for recovering nickel in an effectively utilizable form as a raw material of nickel industry material, by separating efficiently impurity elements of iron, aluminum, manganese, etc., from the sulfuric acid aqueous solution containing nickel and cobalt, and the impurity elements, iron, aluminum, manganese, etc.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: November 12, 2013
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Hiroshi Kobayashi, Hirofumi Shoji, Norihisa Toki, Keiji Kudo, Tatsuya Higaki
  • Publication number: 20130294985
    Abstract: TiO2-supported catalysts include at least molybdenum or tungsten as active components for hydrotreating processes, in particular for the removal of sulfur and nitrogen compounds as well as metals out of crude oil fractions and for the hydrogenation of sulfur oxides.
    Type: Application
    Filed: December 19, 2011
    Publication date: November 7, 2013
    Applicant: Sachtleben Chemie GmbH
    Inventors: Raimond L. C. Bonné, Olga Gonsiorová, Markus Schulte