Utilizing Sulfur Containing Material Patents (Class 205/583)
  • Patent number: 10189083
    Abstract: A method for recycling electrode materials of lithium ion batteries, including the following steps: (1) disassembling the waste lithium ion battery to get positive electrode and negative electrode, immersing the positive electrode and/or the negative electrode into ammonia, then washing by deionized water and drying the positive electrode and/or the negative electrode; (2) sintering the dried positive electrode and/or the negative electrode, and using mechanical method to separate electrode powder material from current collector to get positive electrode powder material and/or negative electrode powder material; (3) supplementing lithium to the positive electrode powder material, then processing the positive electrode powder material by milling, spray drying and sintering to obtain regenerated positive electrode material; or processing the negative electrode powder material by milling, spray drying and sintering to obtain regenerated negative electrode material.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: January 29, 2019
    Assignee: MICROVAST POWER SYSTEMS CO., LTD.
    Inventors: Rui Bi, Xiaoping Zhou
  • Patent number: 10081849
    Abstract: A method of operating a concentrator may comprise producing a final copper concentrate and periodically or continuously analyzing the produced final copper concentrate to obtain a grade value of the produced final copper concentrate. The produced final copper concentrate may be sent to a downstream smelting operation if/when the grade value of the produced final copper concentrate is at or above a minimum acceptable grade threshold and may be sent to a downstream hydrometallurgical operation capable of producing copper cathode, if/when the grade value of the produced final copper concentrate is below or falls below the minimum acceptable grade threshold.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: September 25, 2018
    Assignee: FLSMIDTH A/S
    Inventors: David J. Chaiko, Gary Roy
  • Patent number: 9683277
    Abstract: This invention relates to a process for preparing a ferric nitrate (Fe(NO3)3) reagent, capable of serving as a solvent and copper species oxidizing agent in the ore curing, heap leaching, and/or run of mine (ROM) leaching of a copper ore hydrometallurgical process located at a brown field or green field, from an aqueous copper raffinate solution from the copper ore hydrometallurgical process of copper ore containing iron (II) (Fe2+), and the reagent prepared pursuant to this process.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: June 20, 2017
    Assignee: Likivia Process Metalúrgicos SPA
    Inventors: Alejandro Cartagena Fagerstrom, Ernesto Beas Bustos, Manuel Cartagena Fagerstrom, Christian Hecker Cartes
  • Patent number: 9635751
    Abstract: Provided is a highly reliable flexible circuit body in which a flexible wiring board is prevented from wear caused by rubbing, and a method for production of the flexible circuit body. A flexible circuit body includes a flexible wiring board having an insulating film, a wiring layer formed on the insulating film, and an insulating layer formed on the wiring layer. The flexible wiring board is coated with a thermoplastic elastomer.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: April 25, 2017
    Assignee: Nippon Mektron, Ltd.
    Inventors: Hidekazu Yoshihara, Akihiko Matsumaru, Taisuke Kimura, Atsushi Kajiya
  • Patent number: 8273237
    Abstract: The present invention relates, generally, to a method and apparatus for recovering metal values from a metal-bearing materials, and more specifically, a process for recovering copper and other metals through leaching, electrowinning using the ferrous/ferric anode reaction, and the synergistic addition of ferrous iron to the leach step.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: September 25, 2012
    Assignee: Freeport-McMoran Corporation
    Inventors: John O. Marsden, James D. Gillaspie, John C. Wilmot
  • Publication number: 20120103827
    Abstract: The invention relates to a method for leaching bulk concentrate of chalcopyrite-type by means of an aqueous solution containing sulphuric acid and an oxygen feed at atmospheric pressure and at a temperature between 75° C. and the boiling point of the solution. It is typical of the method that the particle size of the concentrate to be fed into leaching is in the region of 80% below 60-100 ?m and that the concentrate is leached with an aqueous solution, the acid concentration of which is regulated to be around 20-90 g/l.
    Type: Application
    Filed: June 10, 2010
    Publication date: May 3, 2012
    Applicant: OUTOTEC OYJ
    Inventors: Mikko Ruonala, Jaakko Leppinen, Jari Tiihonen
  • Patent number: 8062614
    Abstract: Processes for metal leaching/solvent extraction are described which comprise: (a) providing a first aqueous leach pulp which comprises a mixture of leached solids and an aqueous leach solution comprising a metal, a leaching agent and water; (b) subjecting the first aqueous leach pulp to a first solid-liquid separation to provide a first clarified aqueous leach solution and a second aqueous leach pulp, wherein the second aqueous leach pulp comprises the leached solids at a % solids level greater than the first pulp; (c) subjecting the first clarified aqueous leach solution to a first solvent extraction prior to any significant dilution, whereby a first aqueous raffinate is obtained; (d) subjecting the second aqueous leach pulp to a second solid-liquid separation with dilution via an aqueous stream to obtain a second clarified aqueous leach solution; and (e) subjecting the second clarified aqueous leach solution to a second solvent extraction whereby a second is aqueous raffinate is obtained.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: November 22, 2011
    Assignee: Cognis IP Management GmbH
    Inventors: Gary A. Kordosky, Andrew Nisbett
  • Publication number: 20100242681
    Abstract: Disclosed herein is a method for concentrating gold contained in a leach residue obtained in a copper hydrometallurgical process for recovering copper from a copper sulfide mineral to efficiently separate and recover gold from the leach residue. According to the method, a gold-bearing copper sulfide mineral is subjected to pressure leaching with sulfuric acid at a temperature higher than 102° C. and 112° C. or lower to obtain a leach residue, and the leach residue is subjected to flotation to separate it into a float fraction and a sink fraction. The float fraction obtained by flotation is desulfurized by heating at a temperature of 250 to 800° C. under an inert atmosphere to obtain a desulfurized product. The desulfurized product is subjected to oxidative roasting by heating at a temperature of 600 to 800° C. under an atmosphere of flowing oxygen or air to obtain an oxidatively-roasted product.
    Type: Application
    Filed: March 23, 2010
    Publication date: September 30, 2010
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Noriyuki Nagase, Satoshi Asano, Masatoshi Takano, Kenji Takeda, Shinichi Heguri, Atsushi Idegami
  • Patent number: 7736487
    Abstract: The present invention relates generally to a process for recovering copper and/or other metal values from a metal-bearing ore, concentrate, or other metal-bearing material using pressure leaching and direct electrowinning. More particularly, the present invention relates to a substantially acid-autogenous process for recovering copper from chalcopyrite-containing ore using pressure leaching and direct electrowinning in combination with a leaching, solvent/solution extraction and electrowinning operation. In accordance with one aspect of the process, at least a portion of the residue from the pressure leaching operation is directed to a heap, stockpile or other leaching operation.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: June 15, 2010
    Assignee: Freeport-McMoran Corporation
    Inventors: John O. Marsden, John C. Wilmot, Christy Green, Wayne W. Hazen, David R. Baughman
  • Patent number: 7494580
    Abstract: The present invention relates, generally, to a method for electrowinning copper powder, and more particularly to a method for electrowinning copper powder from a copper-containing solution using the ferrous/ferric anode reaction. In accordance with various embodiments of the present invention, a process for producing copper powder by electrowinning employs alternative anode reaction technology, namely, the ferrous/ferric anode reaction, and enables the efficient and cost-effective production of copper powder at a total cell voltage of less than about 1.5 V and at current densities of greater than 50 A/ft2. A copper powder electrowinning process in accordance with the present invention also reduces or eliminates acid mist generation that is characteristic of electrowinning operations utilizing conventional electrowinning chemistry (e.g., oxygen evolution at the anode), which is advantageous.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: February 24, 2009
    Assignee: Phelps Dodge Corporation
    Inventors: Scot P Sandoval, Antonioni C Stevens, Timothy G Robinson, John O Marsden, Stanley R Gilbert
  • Patent number: 6880703
    Abstract: A floral transport apparatus to facilitate the transportation and delivery of floral arrangements is disclosed. The floral transport apparatus includes a hard plastic container housing a support carriage having a set of longitudinal elastic bands and a set of lateral elastic bands stretched tightly over a box frame to form an upper and lower mesh. The floral arrangement is held securely in the gaps between the tensioned bands of the upper and lower mesh to prevent lateral displacement which would otherwise result in tipping of the floral arrangement. The floral transport apparatus provides a means for carrying many floral arrangements of various sizes simultaneously. Moreover, the floral transport apparatus is easily portable and manageable by a single delivery person and can be washed to keep the apparatus attractive in view of floral customers and potential floral customers.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: April 19, 2005
    Assignee: Floratite Inc.
    Inventors: Celene C. Peña, Tracy R. Jackson
  • Patent number: 6835228
    Abstract: A process of recovering metals from waste lithium ion/Ni—H/Ni—Cd batteries, wherein the waste batteries are calcined and sieved to generate an ash containing metals and metal oxides. The process includes subjecting the ash to a first dissolution etching treatment, a first filtration treatment to obtain a filtrate containing Cd ions which are crystallized as cadmium sulfate, a second dissolution etching treatment for the filtered solid, and a second filtration treatment to obtain a second filtrate. Fe+3, Al+3 and rare earth metal ions in the second filtrate are precipitated as hydroxides by adding a base to the second filtrate. The remaining solution was extracted and counter-extracted to obtain aqueous solutions of Co and Ni ions, which were subjected separately to a electrolysis to deposit Co and Ni metals. Li ions in the residue solution from the electrolysis of Ni was precipitated as carbonate by adding a soluble carbonate salt.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: December 28, 2004
    Assignee: Industrial Technology Research Institute
    Inventors: Jiunn-Ren Lin, I-Long Chang, Yu-Lin Jiang, Jer-Yuan Shiu
  • Patent number: 6569391
    Abstract: The heap leaching of copper bearing ores is improved by using sodium nitrate as an oxidizing chemical reactive in a sulphuric acid leaching solution. In particular, the ore is crushed to <6 mm and stored in heaps less than twelve meters high. The heaps are irrigated with a dilute solution consisting essentially of sulphuric acid and sodium nitrate to produce a leach product. The leach product is recovered from the heap and copper is recovered from the leach product by electrolysis. The pH of the heap is preferably maintained at ≦1.7 pH.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: May 27, 2003
    Assignee: Ingesol LTDA.
    Inventor: Jaime A. Arias
  • Patent number: 6495024
    Abstract: The object of this invention is a method by which arsenic is removed from sulfuric acid solution, in which the sulfuric add concentration is at least 300 g/l, at a temperature of 50-105° C. by reducing the arsenic in the solution with the aid of sulfur dioxide. The arsenic trioxide produced is crystallized from the sulfuric acid solution by cooling. The method is particularly suitable for use in connection with the electrolytic refining of metals, as in copper refining.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: December 17, 2002
    Assignee: Cutokumpo OYJ
    Inventors: Leo Lindroos, Henri Virtanen
  • Patent number: 6319389
    Abstract: Copper values are efficiently recovered from a copper ore, including secondary sulfides, by first crushing the ore to a particle size P-80 of about 1 to 2 inches, then grinding the so crushed ore to a particle size P-80 of between Tyler 4 mesh and 20 mesh, and then classifying the ground ore into a fines fraction of less than 65 mesh and one or more coarse fractions of more than 65 mesh. The fines are then leached or subjected to flotation to form a concentrate which is leached to form a pregnant leach solution. In parallel, the coarse fraction or fractions are leached also to form a pregnant leach solution. The leaching operations are carried out with ferric sulfate lixiviant at atmospheric pressure and elevated temperature. During leaching ferric sulfate is reduced to ferrous sulfate. The pregnant leach solutions are then subjected to solvent extraction to recover the copper values and subsequently to electrowinning to produce copper metal.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: November 20, 2001
    Assignee: Hydromet Systems, L.L.C.
    Inventors: Gearld F. Fountain, Joseph M. Keane
  • Patent number: 6258245
    Abstract: A method for enhancing the operation of an acid solvent extraction and electrowinning operation by inhibiting acidic aerosol formation, allowing increased acid concentration and allowing higher operating temperature is disclosed wherein an antifoam formulation stable at a solution pH of about 1 to 2 is added. A preferred antifoam formulation comprises a glycol ester and an alkyl phenol ethoxylate in a paraffinic oil solvent added to the acid solution of an acid solvent extraction and electrowinning operation.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: July 10, 2001
    Assignees: BetzDearborn Inc., Corporación Nacional del Cobre de Chile
    Inventors: Ricardo Arancibia Cifuentes, Donald C. Roe, Jorge Vergara Chavez, Andres Reghezza Inzunza
  • Patent number: 6245125
    Abstract: A process for the recovery of copper and nickel from a copper and nickel sulphide concentrate in slurry form. The slurry is subjected to a biological oxidation turning the copper sulphide to soluble copper sulphate and the nickel to nickel sulphate. The liquid containing the sulphates is separated from the slurry and treated with a solvent extraction reagent so that copper ions are exchanged by the reagent for hydrogen ions to produce a raffinate which is high in sulphuric acid and low in copper sulphate. The solvent extraction reagent is then stripped from the raffinate with a sulphuric acid solution. Copper is electrically harvested from the sulphuric acid solution and a portion of the copper depleted raffinate is returned to form a slurry with additional ore for subsequent biological oxidation. Nickel is recovered from the remaining portion of the raffinate.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: June 12, 2001
    Assignee: Billiton S.A. Limited
    Inventors: David William Dew, Deborah Maxine Miller
  • Patent number: 6179988
    Abstract: This invention relates to a process for making wire, comprising: (A) forming a circular disk of electrodeposited copper, (B) rotating said disk about its center axis; (C) feeding a cutting tool into the peripheral edge of said disk to cause a strip of copper to peel from said disk; and (D) slitting said strip of copper to form a plurality of strands of copper wire.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: January 30, 2001
    Assignee: ElectroCopper Products Limited
    Inventors: Peter Peckham, Craig J. Hasegawa
  • Patent number: 6168670
    Abstract: Articles of copper and brass can be uniformly pickled in a solution utilizing peroxosulfate as the active agent when the concentration of additives in the form of organic sulfur compounds, inorganic sulfur compounds, organic sulfur-free nitrogen compounds, and inorganic sulfur-free nitrogen compounds are increased to increase the current yield, when the speed of the solution of less noble metals than copper is inhibited and when an organic complex former is added to the pickle.
    Type: Grant
    Filed: September 17, 1998
    Date of Patent: January 2, 2001
    Assignee: LPW-Blasberg Anlagen GmbH
    Inventors: Andreas Möbius, Wolfgang Thiele
  • Patent number: 5932086
    Abstract: Using the electrolytic process to make manganese metal, a source of manganomanganic oxide (Mn.sub.3 O.sub.4) is used in the sulfuric acid leach solution in conjunction with a reducing agent to convert the manganomanganic oxide into manganese sulfate for treatment in the electrolytic cell. Sources of manganomanganic oxide include sintered manganese ore, manganese ore having less than 7% available oxygen such as Assoman Ore, and MOR fume. Reducing agents include sulfur dioxide, activated carbon, reducing sugars and molasses.
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: August 3, 1999
    Assignee: Elkem Metals Company, L.P.
    Inventor: Arash M. Kasaaian
  • Patent number: 5902474
    Abstract: A process for the extraction of precious metals from a copper sulphide ore or concentrate, by treating a leach residue of the ore or concentrate, includes the steps of removing elemental sulphur from the leach residue to obtain a low sulphur residue and subjecting the low sulphur residue to an oxidative leach at elevated temperature and pressure to oxidize sulphur and precious metal compounds present in the low sulphur residue to produce a residue for the extraction of the precious metals therefrom.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: May 11, 1999
    Assignee: Cominco Engineering Services Ltd.
    Inventor: David L. Jones
  • Patent number: 5876588
    Abstract: Ores containing copper, zinc, silver in the form of sulfides are treated by a solution of sulfurated sulfite ions and ammonium ions in order to remove most of the metals from the sulfide ores. This treatment renders the resulting gold bearing ores much more amenable to cyanide extraction. Dissolved metals are reclaimed by appropriate techniques, such as electrowinning or liquid-liquid extraction, and the solution of sulfurated sulfites and ammonia is recycled for further lixiviation of fresh ores.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: March 2, 1999
    Assignee: UG Plus International Inc.
    Inventors: Jean-Marc Lalancette, Hugues Menard, Regina Zamojska
  • Patent number: 5874055
    Abstract: A process for the extraction of a metal from an ore or concentrate comprises subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic solution containing halogen ions and a source of bisulphate or sulphate ions, such as H.sub.2 SO.sub.4. The metals which can be extracted by the process comprises copper, as well as non-cuprous metals, such as zinc, and precious metals, such as gold and silver.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: February 23, 1999
    Assignee: Cominco Engineering Services Ltd.
    Inventor: David L. Jones
  • Patent number: 5869012
    Abstract: A process for the extraction of zinc from a sulphide ore or concentrate containing copper and zinc includes subjecting the concentrate to pressure oxidation in the presence of oxygen and an acidic halide solution to obtain a resulting pressure oxidation slurry and subjecting the slurry to a liquid/solid separation step to produce a liquor containing copper and zinc in solution. The liquor containing the copper and zinc is subjected to a first solvent extraction with a copper extractant to remove copper from the solution and to produce a copper depleted raffinate. The copper depleted raffinate is subjected to a second solid extraction with a zinc extractant to produce a zinc depleted raffinate and the zinc depleted raffinate is recycled to the pressure oxidation step.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: February 9, 1999
    Assignee: Cominco Engineering Services Ltd.
    Inventor: David L. Jones
  • Patent number: 5849172
    Abstract: An improved method and apparatus is provided for the production of copper using a solvent extraction electrowinning process. Process streams formed during the process containing entrained liquids are fed to a cyclone to remove either organic extractant or water (aqueous solutions) from the stream. A raffinate stream fed to a cyclone removes entrained organic phase which organic phase may be recycled to the process. The separated raffinate stream would then typically be recycled to the copper ore leach step to form a pregnant leach solution without the loss of organic solvent and/or the environmental concerns associated with entrained solvent. In a preferred new process, mixers, preferably inline, are used in conjunction with cyclones to provide a solvent extraction electrowinning process which is continuous and efficient and the use of conventional mixers, and particularly settlers, are eliminated.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: December 15, 1998
    Assignee: ASARCO Incorporated
    Inventors: Glenn C. Allen, Neil J. Nebeker, George R. Burns
  • Patent number: 5820653
    Abstract: This invention relates to a process for making a shaped copper article directly from a copper-bearing material, comprising: (A) contacting said copper-bearing material with an effective amount of at least one aqueous leaching solution to dissolve copper ions into said leaching solution and form a copper-rich aqueous leaching solution; (B) contacting said copper-rich aqueous leaching solution with an effective amount of at least one water-insoluble extractant to transfer copper ions from said copper-rich aqueous leaching solution to said extractant to form a copper-rich extractant and a copper-depleted aqueous leaching solution; (C) separating said copper-rich extractant from said copper-depleted aqueous leaching solution; (D) contacting said copper-rich extractant with an effective amount of at least one aqueous stripping solution to transfer copper ions from said extractant to said stripping solution to form a copper-rich stripping solution and a copper-depleted extractant; (E) separating said copper-rich st
    Type: Grant
    Filed: April 18, 1996
    Date of Patent: October 13, 1998
    Assignee: ElectroCopper Products Limited
    Inventors: Michael A. Eamon, Robert J. Fedor, Sharon K. Young, Susan S. Enos, Wendy M. Gort, Roger N. Wright, Stephen J. Kohut
  • Patent number: 5670033
    Abstract: This invention is directed to a process for making copper metal powder from copper-bearing material, comprising: (A) contacting said copper-bearing material with an effective mount of at least one aqueous leaching solution to dissolve copper ions in said leaching solution and form a copper-rich aqueous leaching solution; (B) contacting said copper-rich aqueous leaching solution with an effective amount of at least one water-insoluble extractant to transfer copper ions from said copper-rich aqueous leaching solution to said extractant to form a copper-rich extractant and a copper-depleted aqueous leaching solution; (C) separating said copper-rich extractant from said copper-depleted aqueous leaching solution; (D) contacting said copper-rich extractant with an effective amount of at least one aqueous stripping solution to transfer copper ions from said extractant to said stripping solution to form a copper-rich stripping solution and a copper-depleted extractant; (E) separating said copper-rich stripping soluti
    Type: Grant
    Filed: October 18, 1995
    Date of Patent: September 23, 1997
    Assignee: ElectroCopper Products Limited
    Inventors: David P. Burgess, Wendy M. Gort, Ronald K. Haines, Jackson G. Jenkins, Stephen J. Kohut, Peter Peckham
  • Patent number: 5645708
    Abstract: A process for the extraction of copper from a sulphide copper ore or concentrate comprises subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic chloride solution to obtain a resulting pressure oxidation filtrate and an insoluble basic copper sulphate salt. The pressure oxidation is conducted in the presence of a source of bisulphate or sulphate ions, such as sulphuric acid. The amount of the sulphate source added contains at least the stoichiometric amount of sulphate ions required to produce the basic copper sulphate salt less the amount of sulphate generated in situ in the pressure oxidation. In a particular embodiment, the pressure oxidation is carried out at a predetermined H.sup.+ /Cu ratio so that the pressure oxidation filtrate contains a major portion of the copper in the ore or concentrate and the basic copper salt contains a minor portion of the copper in the concentrate. The invention further provides for the selection of the H.sup.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: July 8, 1997
    Assignee: Cominco Engineering Services Ltd.
    Inventor: David L. Jones
  • Patent number: 5622615
    Abstract: A sulfur dioxide free process for the production of high purity metallic copper from copper-matte wherein copper-matte is leached under oxidizing conditions in a ferric-containing acid copper sulfate electrolyte leach assembly including one or more leach reactors to yield a copper-rich electrolyte, and copper cathode is produced in an electrowinning assembly which is physically decoupled from the leaching assembly and may include one or more electrowinning cells. The process operates at ambient pressure and temperatures less than the boiling point.
    Type: Grant
    Filed: January 4, 1996
    Date of Patent: April 22, 1997
    Assignee: The University of British Columbia
    Inventors: Sharon K. Young, David B. Dreisinger, Jinxing Ji
  • Patent number: 5575907
    Abstract: The invention relates to a process for the recovery of raw materials from presorted collected waste, especially scrap electrochemical batteries and accumulators in which the scrap (10)is first mechanically prepared and divided into coarse and fine fractions (15, 16) which are further processed separately. Materials to be recovered are extracted by dissolution in steps by a first and a second solvent in a wet chemical preparation process from the fine fraction and then recovered individually from the two solutions.
    Type: Grant
    Filed: January 26, 1995
    Date of Patent: November 19, 1996
    Assignee: Batenus Umwelt - Und Recyclingtechnologie GmbH & Co. KG
    Inventor: Walter Lindermann
  • Patent number: 5527382
    Abstract: A hydrometallurgical process for recovering copper from copper bearing ores or fractions, by a process of first wetting and sulfatizing the ore with controlled amounts of H.sub.2 SO.sub.4 and water, followed by acid curing and repulping to sulfatize a substantial portion of the copper in the ore. Also, the fine and coarse fractions can be classified, followed by pile leaching the coarse fraction, preferably reusing the cycled H.sub.2 SO.sub.4 solution obtained during the copper recovery process. Since the coarse fraction is classified from the fine fraction, the pile leaching process is performed at very high specific flows, which substantially reduces the leaching period as compared with that of conventional pile leaching.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: June 18, 1996
    Assignee: Corporacion Nacional Del Cobre De Chile
    Inventors: Aliro Teodoro Nelson Pincheira Alvarez, Andres Antonio Reghezza Insunza, Alberto Segundo Cruz Rivera
  • Patent number: 5520792
    Abstract: This invention is directed to a process for making copper metal powder from copper-bearing material, comprising: (A) contacting said copper-beating material with an effective amount of at least one aqueous leaching solution to dissolve copper ions in said leaching solution and form a copper-rich aqueous leaching solution; (B) contacting said copper-rich aqueous leaching solution with an effective amount of at least one water-insoluble extractant to transfer copper ions from said copper-rich aqueous leaching solution to said extractant to form a copper-rich extractant and a copper-depleted aqueous leaching solution, said extractant comprising (i) at least one oxime characterized by a hydrocarbon linkage with at least one --OH group and at least one .dbd.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: May 28, 1996
    Assignee: ElectroCopper Products Limited
    Inventors: David P. Burgess, Wendy M. Gort, Ronald K. Haines, Jackson G. Jenkins, Stephen J. Kohut, Peter Peckham
  • Patent number: 5516408
    Abstract: This invention relates to a process for making copper wire directly from a copper-bearing material, comprising: (A) contacting said copper-beating material with an effective amount of at least one aqueous leaching solution to dissolve copper ions into said leaching solution and form a copper-rich aqueous leaching solution; (B) contacting said copper-rich aqueous leaching solution with an effective amount of at least one water-insoluble extractant to transfer copper ions from said copper-rich aqueous leaching solution to said extractant to form a copper-rich extractant and a copper-depleted aqueous leaching solution; (C) separating said copper-rich extractant from said copper-depleted aqueous leaching solution; (D) contacting said copper-rich extractant with an effective amount of at least one aqueous stripping solution to transfer copper ions from said extractant to said stripping solution to form a copper-rich stripping solution and a copper-depleted extractant; (E) separating said copper-rich stripping solu
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: May 14, 1996
    Assignees: Magma Copper Company, Gould Electronics Inc.
    Inventors: Peter Peckham, Sharon K. Young, Bradford A. Mills, Adam G. Bay, Michael A. Eamon, Roger N. Wright, Stephen J. Kohut