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| Number | Title | Issue Date |
| 8147782 | Producing nickel hydroxide suitable for pelletization with iron-containing ore and for stainless steel manufacture A process for producing a purified nickel hydroxide precipitate from a nickel-containing leach solution with impurities including one or more of the following: manganese, copper, zinc, iron and/or cobalt, so that the purified nickel hydroxide is suitable for pelleti... | 04/03/2012 |
| 8003066 | Method for scrubbing amine-type extractant A method for scrubbing an amine extractant (A) containing an amine added with hydrochloric acid, and an amine binding a metal chloro complex ion, in a scrubbing stage constituting a solvent extraction step, characterized by substituting a chloride ion of the amine, ... | 08/23/2011 |
| 7959881 | Method for scrubbing an amine type extractant after stripping The method for scrubbing an amine type extractant after stripping to be able to regenerate the same so that the amine type extractant can be repeatedly reused as it is in the extraction stage in the solvent extraction process, when an amine type extractant is regene... | 06/14/2011 |
| 7935322 | Solvent extraction process for separating cobalt and/or nickel from impurities in leach solutions A process for the separation of nickel, cobalt or both from impurity elements selected from one or more of calcium, magnesium, manganese and chloride contained in a leach solution, the process comprising the step of subjecting the leach solution to solvent extractio... | 05/03/2011 |
| 7727496 | Solvent extraction of impurity metals from a valuable metal sulphate solution The present invention relates generally to a method of extracting cobalt and other impurity metals from a concentrated nickel sulphate solution by a solvent extraction process whereby a cationic solvent extractant is separately pre-equilibrated with a portion of a p... | 06/01/2010 |
| 7387767 | Recovery of nickel, cobalt, iron, silica, zinc and copper from laterite ore by sulfuric acid leaching A process for recovering nickel and cobalt values from nickel- and cobalt-containing laterite ores as an enriched mixed nickel and cobalt sulphide intermediate and for producing nickel and cobalt metal from the nickel and cobalt sulphide intermediate. The laterite o... | 06/17/2008 |
| 7357827 | Integrated ammoniacal solvent extraction and hydrogen reduction of nickel A process is provided for the recovery of a metallic nickel product in a solvent extraction process which includes the steps of forming a nickel ammine complex by stripping nickel from a nickel loaded organic phase with a high strength ammonia solution and then redu... | 04/15/2008 |
| 7309474 | Composition and process A solvent extraction composition is comprised of one or more orthohydroxyarylaldoximes and one or more othohydroxyarylketoximes, and one or more equilibrium modifiers in an amount providing a degree of modification of the orthohydroxyarylaldoximes from about 0.2 to ... | 12/18/2007 |
| 7300639 | Process for removing metals from liquids A process is provided for removing one or more metals from liquids. Also provided is a process for the synthesis of aP2 inhibiting compounds having the formula (I) wherein R1, R2, R3 | 11/27/2007 |
| 7214256 | Solvent extraction process A circuit configuration for a metal solvent extraction plant comprising: A) an extraction section for extracting metal ions from an aqueous leach solution containing the metal ions with an organic solvent solution containing at lea... | 05/08/2007 |
| 7160525 | Monodisperse noble metal nanocrystals Nanoparticle compositions of noble metals, and methods of making them, are described. The nanoparticle compositions are made by reacting a salt or complex of a noble metal, such as Au, Ag, Cu or Pt, with a weak ligand, and a reducing agent, in a single liquid phase.... | 01/09/2007 |
| 7122164 | Niobate-based octahedral molecular sieves Niobate-based octahedral molecular sieves having significant activity for multivalent cations and a method for synthesizing such sieves are disclosed. The sieves have a net negatively charged octahedral framework, comprising niobium, oxygen, and octahedrally coordin... | 10/17/2006 |
| 7115242 | Method for the synthesis of ferrates A method of synthesis of alkali metal ferrates and alkaline earth metal ferrates, in which a trivalent iron compound is mixed with potash and optionally persulphate, and the mixture is heated at a temperature in the range of about 250 to about 500° C. for about 1 t... | 10/03/2006 |
| 7045656 | Selective separation of iron by treatment with an ion-exchanging resin comprising diphosphonic acid groups A process is described for recycling catalysts in the reaction for the oxidation of alcohols and/or ketones to carboxylic acids and more particularly the oxidation of cyclic alcohols and/or cyclic ketones to dicarboxylic acids, such as the oxidation of cyclohexanol ... | 05/16/2006 |
| 7045057 | Preparation of homogeneously loaded ion exchangers A process for preparing an ion-exchangeable media within a moving-bed or simulated moving-bed device, which can create a true or simulated media flow, comprising the steps of packing the bed with ion-exchangeable media and passing a solution, containing a mixture of... | 05/16/2006 |
| 7037482 | Solvent extraction of a halide from a aqueous sulphate solution A method of extracting a halide and sulphate from an aqueous sulphate solution, such as a zinc sulphate solution, comprises subjecting the solution to solvent extraction to extract halide and sulphate from the solution and controlling the amount of sulphate extracte... | 05/02/2006 |
| 7025899 | Concentrated solutions of oxime metal extractants and method of formulating extractant compositions therefrom The preparation of concentrated solutions of oxime metal extractants, such as aldoximes and ketoximes, or mixtures of aldoxime and ketoxime, and the use thereof in formulating or preparing extraction reagent compositions for use in an extractant organic phase in a p... | 04/11/2006 |
| 7008601 | Materials and methods for the separation of copper ions and ferric iron in liquid solutions A silica-polyamine based extraction material removes selected transition metal ions from solution in the presence of iron ions. The silica-polyamine base is a reaction product of a polyamine and a covalently anchored trifunctional hydrocarbylsilyl that yields non-cr... | 03/07/2006 |
| 6960328 | Zirconium phosphate and method of making same A zirconium phosphate compound having a Zr:P ratio of from about 1.80-2.0 to 1, which compound's H-form exhibits a single peak at −13.7±0.5 ppm in the 31P NMR spectra. The compound is useful as a catalyst, catalyst support and ion exchange media having... | 11/01/2005 |
| 6923947 | Method of making ferric chloride with reduced amounts of hydrochloric acid for water treatment The present invention involves a system and method of making ferric chloride with reduced amounts of hydrochloric acid for water treatment. The method comprises preparing a reactant batch comprising ferric oxide and hydrochloric acid at a predetermined molar ratio. ... | 08/02/2005 |
| 6872369 | Selective separation of iron by treatment with an ion-exchanging resin comprising diphosphonic acid groups The invention relates to a process for selectively separating iron from other metal ions, in particular ions present in certain oxidation catalysts. It also relates to a process for recycling catalysts in the reaction for the oxidation of alcohols and/or keto... | 03/29/2005 |
| 6846470 | Methods for producing indium-containing aqueous solutions containing reduced amounts of metal impurities A method for producing an indium-containing aqueous solution having a reduced amount of metal impurities is provided. A method for producing an indium-containing aqueous solution having a reduced amount of metal impurities which comprises bringing an aqueous solutio... | 01/25/2005 |
| 6838004 | Nanopore reactive adsorbents for the high-efficiency removal of waste species A nanoporous reactive adsorbent incorporates a relatively small number of relatively larger reactant, e.g., metal, enzyme, etc., particles (10) forming a discontinuous or continuous phase interspersed among and surrounded by a continuous phase of smaller adso... | 01/04/2005 |
| 6777511 | Process for producing poly (meth) acrylates having reduced metal content An industrially excellent process for producing a poly(meth)acrylate having a reduced metal content which comprises contacting a mixture of a poly(meth)acrylate and an organic solvent with an acidic aqueous solution, such as an aqueous solution obtained by dissolvin... | 08/17/2004 |
| 6746653 | Process for recovering catalyst transition metals from salt-containing reaction mixtures Transition metals may be recovered from a salt-containing mixture containing at least one transition metal compound, salts, and organic compounds by separating from the salt-containing mixture a mixture of the transition metal compound and the salts. This mixture, t... | 06/08/2004 |
| 6733688 | Composition and process for the solvent extraction of metals using aldoxime or ketoxime extractants A solvent extraction composition is provided which comprises one or more orthohydroxyarylaldoxime or orthohydroxyarylketoxime and at least one dialkyl ester of an optionally substituted ethylene or polyethylene glycol and preferably a water immiscible organic solven... | 05/11/2004 |
| 6726887 | Composition of oxime and hydroxy-ester for the solvent extraction of metals A solvent extraction composition is provided which comprises one or more orthohydroxyarylaldoximes or orthohydroxyarylketoximes and one or more esters substituted with a hydroxyl group, and preferably a water immiscible organic solvent. The orthohydroxyarylaldoximes... | 04/27/2004 |
| 6709641 | Method for extracting anions The invention relates to a method of extracting anions based on metals of groups IV B to VIII of the periodic table from aqueous solutions thereof, wherein compounds of general formula are used as extractants, in which a... | 03/23/2004 |
| 6699446 | Methods for separation of titanium from ore A method for the production of titanium metal from titanium-bearing ore. The method comprises leaching said ore or a concentrate thereof with an aqueous solution of a hydrogen halide; separating solids from the leach solution, to provide a leachate soluti... | 03/02/2004 |
| 6589492 | Process for recovering catalyst components from a mother liquor of liquid phase oxidation A process for recovering components of a catalyst from a mother liquor of liquid phase oxidation in production of aromatic carboxylic acids by liquid phase oxidation of aromatic hydrocarbons having substituents with a gas containing oxygen in a presence o... | 07/08/2003 |
| 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 |
| 6350420 | Resin-in-pulp method for recovery of nickel and cobalt A process is provided for the direct recovery of nickel and cobalt from a nickeliferous oxide ore leach slurry by ion exchange. A nickeliferous ore is leached with mineral acid to solubilize the metals. The resulting leach slurry is contacted with ion exc... | 02/26/2002 |
| 6350419 | Combined supported liquid membrane/strip dispersion process for the removal and recovery of metals The present invention provides a novel process for the removal and recovery of metals from waste waters and process streams. The process of the present invention utilizes a combination of a supported liquid membrane (SLM) and a strip dispersion to improve... | 02/26/2002 |
| 6274104 | Non-ferrous metal recovery method utilizing a melt sulphation reaction The invention relates to a method for recovering non-ferrous metals, particularly nickel, cobalt, copper, zinc, manganese and magnesium, from materials containing said metals by converting said non-ferrous metals into sulphates by means of melt and melt c... | 08/14/2001 |
| 6267936 | Method for effecting solvent extraction of metal ions using hydrocarbon soluble aminomethylene phosphonic acid compounds Solvent extraction of one or more metal ions from an aqueous solution in the presence of hydrocarbon-soluble aminomethylenephosphonic acid derivatives.... | 07/31/2001 |
| 6261526 | Nickel recovery process and compositions for use therein A process for the recovery of nickel from a nickel containing ore in which the ore, particularly a laterite ore, is initially leached with an aqueous acid solution, after which the nickel is precipitated as nickel hydroxide by adding a hydroxide to the aq... | 07/17/2001 |
| 6245125 | Copper, nickel and cobalt recovery 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 l... | 06/12/2001 |
| 6231823 | Solvent extraction process for the separation of cobalt from nickel in aqueous sulphate-containing solutions An improved process for separating cobalt values from nickel values in an aqueous nickel and cobalt sulphate-containing solution in which the solution is contacted with a water-immiscible organic solution containing an organophosphorous acid in a cobalt e... | 05/15/2001 |
| 6232353 | Bifunctional phenyl monophosphonic/sulfonic acid ion exchange resin and process for using the same A cross-linked water-insoluble ion exchange resin comprised of polymerized monomers having a phenyl ring is disclosed. A contemplated resin contains (i) polymerized phenyl ring-containing monomers having a phosphonic acid ligand linked to the phenyl ring,... | 05/15/2001 |
| 6214301 | Hafnium radioisotope recovery from irradiated tantalum Hafnium is recovered from irradiated tantalum by: (a) contacting the irradiated tantalum with at least one acid to obtain a solution of dissolved tantalum; (b) combining an aqueous solution of a calcium compound with the solution of dissolved tantalum to ... | 04/10/2001 |
