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| Number | Title | Issue Date |
| 7138005 | Nickel refining method The present invention provides a nickel refining method which uses nickel sulfide produced from nickel oxide ore using a hydrometallurgical process, as the raw material, and in which chlorine leaching is performed using a chloride solution, wherein a cementation rea... | 11/21/2006 |
| 6485542 | Ni-Fe alloy sputtering target for forming magnetic thin films, magnetic thin film, and method of manufacturing the Ni-Fe alloy sputtering target An Ni--Fe alloy material suitable for forming a ferromagnetic Ni--Fe alloy thin film is provided. The magnetic thin film produces a small number of particles during sputtering, and excels in corrosion resistance and magnetic properties. A method of manufa... | 11/26/2002 |
| 6428604 | Hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate A hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate. The process involves forming a slurry of the sulfidic flotation concentrate in an acid solution, and subjecting the slurried flotation concent... | 08/06/2002 |
| 5595642 | Pressure leaching of nickel and cobalt sulphides with chlorine under controlled redox potential conditions A method of pressure leaching nickel and cobalt from sulphidic precipitates is provided, wherein such precipitates are leached with chlorine at a controlled redox potential of between 400 and 550 mV (Ag/AgCl), catalysed by copper, and at a temperature of ... | 01/21/1997 |
| 5571308 | Method for recovering nickel from high magnesium-containing Ni-Fe-Mg lateritic ore A method is provided for recovering nickel from high magnesium-containing lateritic ores which also contain iron. The ores which are referred to as saprolitic ores are subjected to leaching with a mineral acid from the group consisting of HCl, H2 | 11/05/1996 |
| 5487819 | Production of metals from minerals A process for producing one or more metals from a mineral feedstock (12) is defined. The mineral is fed to a leaching apparatus (10) wherein it is contacted with electrolyte (14). The leaching apparatus has zones of decreasing oxidation potential (17, 18,... | 01/30/1996 |
| 5282938 | Process for recovery of trace metals and salts from waste combustion residues A method for the continuous treatment of air pollution control residues from various resource recovery systems whereby the air pollution control residue is treated with a dilute salt extracting solution at a pH chosen to maximize the recovery of lead, for... | 02/01/1994 |
| 5262019 | Decontamination of radioactive metals Technetium-contaminated nickel is decontaminated by electrolytically dissolving nickel having a gross beta activity of at least about 74 Bq in a sulfuric acid solution having a pH between about 0.5 and 2.0. The applied voltage is from 2.0 v/cell to 5.0 v/... | 11/16/1993 |
| 4874483 | Process for the preparation of redox battery electrolyte and recovery of lead chloride A redox battery electrolyte is prepared from a chromium and/or iron base raw material containing nickel as impurities by dissolving the raw material in a hydrochloric acid-containing aqueous liquid to form a solution containing chromium ions and/or iron i... | 10/17/1989 |
| 4828661 | Process for recovery of metals from metal/plastic waste The invention relates to a process for recovery of metals from metal/plastic waste using used etching and washing solutions from the electronics industry, with the following process steps: (a) heating of the metal/plastic waste in a heating bath in order to ... | 05/09/1989 |
| 4652352 | Process and apparatus for recovering metals from dilute solutions A process and apparatus are provided for recovering metals from dilute solution utilizing ion exchange and, optionally, electrolytic recovery. Ammonium salt regeneration solutions for use in the process and apparatus are also provided. In one aspect, the ... | 03/24/1987 |
| 4594132 | Chloride hydrometallurgical process for production of copper A process for extractive metallurgy of metal sulfides, in particular copper sulfide ores, in which a metal sulfide mineral feed material is cocurrently oxidized in an aqueous cupric chloride solution in the presence of an oxidant to form a slurry containi... | 06/10/1986 |
| 4384940 | Chlorine leaching of nickel-cobalt-iron sulphides Metal values are recovered from mattes containing nickel, cobalt and iron by first suspending the mattes in water, oxygen pressure leaching and then chlorine leaching the residue from the oxygen leach.... | 05/24/1983 |
| 4159232 | Electro-hydrometallurgical process for the extraction of base metals and iron A HYDROMETALLURGICAL PROCESS FOR THE ELECTROLYTIC RECOVERY OF SELECTED BASE METALS (ESPECIALLY COPPER OR POSSIBLY NICKEL) FROM SULPHIDE ORE CONCENTRATES CONCURRENTLY WITH THE EXTRACTION OF METALLIC IRON IN A COMMERCIALLY USABLE FORM. The process involves ... | 06/26/1979 |
| 4144056 | Process for recovering nickel, cobalt and manganese from their oxide and silicate ores A process for recovering the metals manganese, nickel, and cobalt from their oxides and silicates in which the metal oxide or silicate is heated with ferric chloride in the absence of air and in the presence of a volatility depressant salt which is prefer... | 03/13/1979 |
| 4067952 | Leaching of copper-nickel concentrates A process for the treatment of nickel-copper concentrates comprises the steps of leaching nickel selectively with a dilute hydrochloric acid solution, separating the leach solution from the residue, roasting the residue at a temperature sufficient to form... | 01/10/1978 |
| 3992270 | Method of reclaiming nickel values from a nickeliferous alloy A method and apparatus for reclaiming nickel values from a nickeliferous alloy in which the nickeliferous alloy is subjected to nitric lixiviation and the nickel values are recovered from the resulting nickel nitrate solution.... | 11/16/1976 |
| 3975189 | Recovery of copper sulphide and nickel from solution A method for selectively recovering metals from generally sulphidic particulate materials containing metals selected from nickel, copper and precious metals in which the particulate material is preferentially leached in an agitated chloride solution conta... | 08/17/1976 |
| 3941668 | Refractory ore beneficiation Process for beneficiating ores which contain metallic values in the form of refractory oxides as well as in the form of pyrometallurigically reducible metallic compositions. The portion of the ore which is pyrometallurgically reducible is so reduced to pr... | 03/02/1976 |
