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Patents - EXTRACTION AND PURIFICATION

Category list

January 2007
EXTRACTION AND PURIFICATION
WO 2006/113944 A1 (10/26/2006) Hardwick, Edmund, Kevin
Hardwick E.K.
SEPARATION OF NICKEL FROM COBALT BY USING CHLORIDIZING SOLUTION AND COBALT-SELECTIVE RESIN
Nickel is recovered from a nickel-cobalt mixture by dissolving the mixture in a chloride solution derived from different chloride sources, to form an anionic cobalt chloride complex which is separated from the solution using an anionic resin. The nickel in the remaining solution passes through the bed of resin and is separated there from using a nickel selective resin.
WO 2006/070052 A1 (07/06/2006) Outokumpu Technology Oy
Hultholm S-E, Hyvärinen O.
METHOD FOR THE HYDROMETALLURGICAL TREATMENT OF SULFIDE CONCENTRATE CONTAINING SEVERAL VALUABLE METALS
Valuable metals in a sulphidic, multi-component concentrate are recovered eg copper sulphide is leached using an alkali chloride - copper (II) chloride solution. The sulphides of other valuable metals, such as zinc, nickel, cobalt and lead are leached before copper leaching and each is recovered as a separate product before copper recovery.
WO 2006/053376 A1 (05/26/2006) BHP Billiton SSM Technology Pty Ltd
Liu H, Duarte A, Meihack W.
CONSECUTIVE OR SIMULTANEOUS LEACHING OF NICKEL AND COBALT CONTAINING ORES
Nickel and cobalt are recovered from ores, by first leaching a laterite ore and/or a partially oxidised sulfide ore with an acid solution to produce a pregnant leach solution containing at least dissolved nickel, cobalt and ferric ions, and subsequently leaching a sulfide ore or concentrate with the pregnant leach solution to produce a product liquor.
July 2006
WO 2006/032097 A1 (03/30/2006) Commonwealth Scientific And Industrial Research Organisation
Cheng C.Y.
Urbani M.D.
SYNERGISTIC SOLVENT EXTRACTION PROCESS
WO 2006/029499 A1 (03/23/2006) Skye Resources Inc.
Neudorf D. Huggins D.A.
METHOD FOR NICKEL AND COBALT RECOVERY FROM LATERITE ORES BY COMBINATION OF ATMOSPHERIC AND MODERATE PRESSURE LEACHING
Laterite ores containing limonite and saprolite are leached with mineral acid to dissolve most of the soluble non-ferrous metals and soluble iron. After processing, the slurry is then reduced, and nickel and/or cobalt is subsequently recovered from the leach solution by solvent extraction or other recovery method.
WO 2006/000880 A1 (01/05/2006) Anglo Operations Limited
Alexander D.C. Schulze-Messing J.
METHOD FOR PRODUCING NICKELIC HYDROXIDE
Nickelic hydroxide, produced by oxidation of nickelous hydroxide, using a gas mixture of less than about 15% sulphur dioxide in oxygen, may be used to oxidise impurities eg Co2+ and/or Co3+ ions in a nickel electrolyte, causing the oxidised impurities to precipitate out of the electrolyte
WO 2006/000098 A1 (01/05/2006) Skye Resources Inc.
Neudorf D.
METHOD FOR NICKEL AND COBALT RECOVERY FROM LATERITE ORES BY REACTION WITH CONCENTRATED ACID WATER LEACHING
A process for leaching laterite ores containing limonite and saprolite in a two stage process. The first stage consisting of mixing and reacting the ore with concentrated mineral acid, and the second stage consisting of preparing a slurry of the acid/ore mixture in water and leaching the mixture to dissolve nickel and cobalt.
WO 2005/116281 A1 (12/08/2005) Pacific Metals Co., Ltd.
Yakushiji H. Ito S. Miura K. Shimamori M.
METHOD OF RECOVERING NICKEL OR COBALT
The first of two oxide ores, one of a higher magnesium content than the other, is leached with sulphuric acid. The solution is reacted with the second ore and the pH of the mixture adjusted to obtain a liquid containing nickel or cobalt and a residue containing iron. The mixture is neutralized, to obtain a liquid containing nickel or cobalt and an iron containing residue.
WO 2005/116279 A1 (12/08/2005) Pacific Metals Co., Ltd.
Yakushiji H. Ito S.
METHOD OF RECOVERING NICKEL AND COBALT
In a solvent extraction step, the nickel and cobalt contained in a neutralized liquid are separated into a nickel sulfate solution and a cobalt sulfate solution with an organic solvent containing a monothiophosphinic acid as an extractant. A cobalt sulfate solution containing almost no magnesium, manganese, and calcium can be obtained.
January 2006
WO 2005/098061 A1 (10/20/06) Pacific Metals Co. Ltd
Yakushiji H., Ito S., Miura K., Shimamori M.
LEACHING METHOD AND RECOVERING METHOD FOR NICKEL OR COBALT
In a leaching step, sulfuric acid and a reducing agent is added to a slurried ore, to reduce a trivalent cobalt oxide, leach and produce a solution containing nickel and cobalt and a residue. The residue contains natrojarosite formed by the reaction of the iron leached from the slurried ore, the sulfuric acid and a sodium salt.
WO 2005/098060 A1 (10/20/06) Pacific Metals Co. Ltd
Yakushiji H., Ito S., Miura K., Shimamori M.
METHOD FOR RECOVERING NICKEL OR COBALT
In a leaching step, a slurried ore is leached with sulfuric acid to form a sulfuric acid leached solution containing nickel and cobalt and a leaching residue, which contains natrojarosite formed by the reaction of the iron reached from the slurried ore and a sodium salt.
WO 2005/073415 A1 (08/11/05) Commonwealth Scientific and Industrial Research Organisation
Cheng C.Y., Urbani M.D.
SOLVENT EXTRACTION PROCESS FOR SEPARATING COBALT AND/OR MANGANESE FROM IMPURITIES IN LEACH SOLUTIONS
Cobalt and/or manganese are separated from impurity elements such as calcium and magnesium contained in a leach solution, the process comprising the step of subjecting the leach solution to solvent extraction using an organic solution of a carboxylic acid such as Versatic 10 and a hydroxyoxime such as LIX 63, optionally together with a stabiliser.
WO 2005/073416 A1 (08/11/05) Commonwealth Scientific And Industrial Research Organisation
Cheng C.Y., Urbani M.D.
SOLVENT EXTRACTION PROCESS FOR SEPARATING COBALT AND/OR MANGANESE FROM IMPURITIES IN LEACH SOLUTIONS
A process for the separation of nickel, cobalt or both from impurity elements eg calcium, magnesium, manganese and chloride contained in a leach solution, comprises the step of subjecting the leach solution to solvent extraction using a carboxylic acid (such as Versatic 10), a hydroxyoxime such as LIX 63, a kinetic accelerator such as TBP and optionally a stabiliser.
WO 2005/054137 A1 (06/16/05) H.C. Starck GmbH
Traving M., Bäcker W., Görge A, Gutknecht W.
METHOD FOR SEPARATING Pb AND Ni FROM Co-CONTAINING MIXTURES
A method for the selective separation of nickel and lead from acidic aqueous cobalt solutions in particular, cobalt carbonate, sulphate or chloride solutions by reactive extraction with acidification by means of a carbonate solution.
WO 2005/007898 A3 (05/19/05) Obschestvo s Orgranichennoy Otvetstvennostyu ""GEOWEST""
Batshev V.I., Kalashnikov A.V, Koltsov V.Y., Melnik D.V, Sinegribov V.A, Shchukin M.I.
METHOD FOR PROCESSING OXIDISED NICKEL-COBALT ORE (VARIANTS)
A2 published (01/27/05)
February 2005
"WO 2005/007898 A2 (01/27/05) Obschestvo s Ogranichennoy Otvetstvennostyu ""GEOWEST"""
"Batshev, V. I.; Kalashnikov, A. V.; Koltsov, V. Y.; Melnik, D. V.; Sinegribov, V. A.; Shchukin, M. I."
METHOD FOR PROCESSING OXIDISES NICKEL-COBALT ORE (VARIANTS)
"Nickel and cobalt are extracted from oxidised nickel-cobalt ores, with an increased nickel extraction ratio, by granulating the ore at a stochiometric consumption of sulphuric acid at a temperature of 250-450°C over 1-2 hours in one or two stages. The metals are extracted from the solution after water leaching of nickel sulphates and other metals, by known methods."
WO 2004/105945 A1 (12/09/04) Clean Teq Pty Ltd
"Zontov, N."
ANION EXCHANGE RESINS FOR RECOVERY OF ANIONS AND ANIONIC COMPLEXES CONTAINING METALS FROM LIQUIDS AND PULPS
"A range of anion-exchangers resins (sorbents) suitable for the recovery of anions and anionic complexes containing metals from liquids and/or pulps and also suitable for selectively separating chemical elements have very similar physical and chemical characteristics, for example, nickel and cobalt. "
WO 2004/098775 A1 (11/18/04) Clean Teq Pty Ltd
"Zontov, N."
A RESIN AND PROCESS FOR EXTRACTING NON-FERROUS METALS
"Non-ferrous metals (nickel, cobalt, copper etc) are directly recovered from ores, concentrates, semiproducts and/or solutions by ion exchange, after leaching with a mineral acid to dissolve the metals. The pH of the resulting leach slurry is adjusted to 1.0 - 5.0 using eg limestone. Non-ferrous metals are selectively absorbed from this leach slurry with ion-exchange resin."

 

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