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| Number | Title | Issue Date |
| 8062614 | Methods for improving the recovery of metal leaching agents 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 ... | 11/22/2011 |
| 8003064 | Controlled copper leach recovery circuit The present invention relates generally to a process for controlled leaching and sequential recovery of two or more metals from metal-bearing materials. In one exemplary embodiment, recovery of metals from a leached metal-bearing material is controlled and improved ... | 08/23/2011 |
| 7993613 | More efficient ether modifiers for copper extractant formulations The disclosed invention provides water-insoluble, water-immiscible extraction reagent compositions comprising an extractant reagent comprising one or more aldoxime extractants, optionally including one or more ketoxime extractants, in combination with one or more et... | 08/09/2011 |
| 7837959 | Synergistic solvent extraction process A process for separating one or more metal ions forming a first group of metal ions such as copper, zinc and ferric ions, from one or more other metal ions forming a second group of metal ions such as cobalt and nickel, comprising: | 11/23/2010 |
| 7799294 | Methods for improving the recovery of metal leaching agents 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 ... | 09/21/2010 |
| 7682581 | Method for the removal of copper from a zinc sulphate solution The purpose of the invention is to remove copper selectively from a concentrated zinc sulphate solution by ion exchange. The method enables a significant reduction in the use of zinc powder during the solution purification of zinc sulphate solution and makes possibl... | 03/23/2010 |
| 7666371 | Method for recovering metal values from metal-containing materials using high temperature pressure leaching The present invention relates generally to a process for recovering copper and other metal values from metal-containing materials through pressure leaching operations. In accordance with the various aspects of the present invention, metal-containing pregnant leach s... | 02/23/2010 |
| 7635457 | Method for heap and dump leaching coupled with solvent extraction for metal recovery The disclosed invention provides a process for enhanced recovery of one or more metal values from heap and/or dump leaching of ores containing the metal values, the process comprising: (a) providing a high grade leach solution obta... | 12/22/2009 |
| 7615199 | Method for the recovery of valuable metals and arsenic from a solution The invention relates to a method for the treatment of material containing at least one valuable metal and arsenic to form a valuable metal-depleted scorodite sediment and a pure aqueous solution to be discharged from the process. According to the method, the valuab... | 11/10/2009 |
| 7585475 | Highly-conductive copper extractant formulations A method of creating solvent extraction reagent formulations that have high conductivity by combining (a) phenolic oxime extraction reagent(s) or other extraction reagent(s) in the organic phase of a solvent extraction circuit of a metal recovery operation, comprisi... | 09/08/2009 |
| 7449160 | Process of solvent extraction of copper A process for efficient separation/recovery of copper involving selective extraction of the copper ion with the aid of an organic extractant from an aqueous chloride solution containing copper and one or more concomitant elements, discharged from an extractive metal... | 11/11/2008 |
| 7438874 | Pressure oxidation leaching in the presence of an acidic solution of halide and sulfate ions from copper and base metal containing ore/concentrate A process for the extraction of a base metal such as Ni, Co or Zn, from suiphide ore or concentrate containing copper and the base metal comprises the step of subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic solution co... | 10/21/2008 |
| 7390468 | Extraction process The invention relates to a method for the stabilization of the production capacity of an extraction plant extracting metals in a process, where the metal content of the feed solution varies. For the stabilization of capacity, the extraction cells and their piping ar... | 06/24/2008 |
| 7329396 | Process for the recovery of value metals from material containing base metal oxides A process for leaching a value metal from oxidic materials, such as a lateritic nickel ore, comprising the step of leaching the ore with a lixiviant comprising a cationic salt (e.g., magnesium chloride) and hydrochloric acid is disclosed. An oxidant or additional me... | 02/12/2008 |
| 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 |
| 7288184 | Process for mitigating acids in a system for separating aromatic hydrocarbons from a hydrocarbon feedstream Disclosed is a process for removing acids in a system in which aromatic hydrocarbons are separated from a mixture with aliphatic hydrocarbons. The aromatic hydrocarbons are extracted from the mixture using an extracting solvent. The aromatic hydrocarbons are strippe... | 10/30/2007 |
| 7285222 | Method for recycling sludge during waste-water treatment A method for recycling sludge during waste-water treatment firstly utilizes a process of chemical coagulation to produce sludge rich in copper ions. The sludge is then leached in a sulfuric acid storage tank with sulfuric acid of concentration 1-2N, whereby a extrac... | 10/23/2007 |
| 7276160 | Method and apparatus for metal removal by ion exchange The present invention provides a method for selectively removing metal ions of interest from a solution (12), such as the wastewater from a chemical mechanical polishing process. The method comprises contacting a solution (12) containing solid particle... | 10/02/2007 |
| 7255795 | Process for selectively removing molybdenum from liquid mixtures containing it together with vanadium Process for selectively removing molybdenum from liquid mixtures containing it, in a quantity greater than (200) mg/l, together with vanadium characterized in that it comprises the following steps: bringing the liquid mixture to a pH of less than (3); adding a solut... | 08/14/2007 |
| 7229535 | Hydrogen bubble reduction on the cathode using double-cell designs An apparatus and method for planarizing a surface of a substrate using a chamber separated into two parts by a membrane, and two separate electrolytes is provided. The embodiments of the present invention generally provide an electrochemical mechanical polishing sys... | 06/12/2007 |
| 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 |
| 7189380 | Extraction of metals with diquaternary amines Selective extraction of one or more metal anions from an aqueous solution, by contacting the aqueous solution with an organic solution including a diquaternary amine, wherein the diquaternary amine has two diquaternary nitrogens spaced at a distance of less than abo... | 03/13/2007 |
| 7175818 | Extraction of metals with diquaternary ammonium salts Selective extraction of a metal anion complex, such as a platinum-group metal halide, from an aqueous solution containing other metal anions or anion complexes, by contacting the solution with a diquaternary ammonium salt having two quaternary nitrogens spaced at a ... | 02/13/2007 |
| 7169371 | Process for the treatment of molybdenum concentrate A method of treatment or purification of a molybdenum concentrate also containing copper, comprises the step of subjecting the molybdenum concentrate to pressure oxidation in the presence of oxygen and a feed solution containing copper (e.g. CuSO4) and ha... | 01/30/2007 |
| 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 |
| 7157022 | Multivalent metal ion extraction using diglycolamide-coated particles A separation medium, a method for using that separation medium and an apparatus for selectively extracting multivalent cations such as pseudo-lanthanide, prelanthanide, lanthanide, preactinide or actinide cations from an aqueous acidic sample solution is described. ... | 01/02/2007 |
| 7147782 | Method and apparatus for metal removal by ion exchange The present invention provides a method for selectively removing metal ions of interest from a solution (12), such as the wastewater from a chemical mechanical polishing process. The method comprises contacting a solution (12) containing solid particle... | 12/12/2006 |
| 7128825 | Method and composition for polishing a substrate Polishing compositions and methods for removing conductive materials from a substrate surface are provided. In one aspect, a composition includes an acid based electrolyte system, one or more chelating agents, one or more corrosion inhibitors, one or more inorganic ... | 10/31/2006 |
| 7091525 | Apparatus for producing a display unit A display device is formed by burying at least part of a light emitting device in an insulating material, wherein a drive electrode for the light emitting device is formed so as to be extracted on a surface of the insulating material. A display unit is produced by t... | 08/15/2006 |
| 7081991 | Dye-based filter A display includes a light source. The display also includes a filter positioned to receive light from the light source. The filter is a dye-based filter and attenuates light in the infrared range. The filter can be configured to have a very sharp spectral cutoff. T... | 07/25/2006 |
| 7066983 | Method for thiosulfate leaching of precious metal-containing materials Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relatively low pH, reduction of polyth... | 06/27/2006 |
| 7048857 | Method and apparatus for metal removal ion exchange The present invention provides a method for selectively removing metal ions of interest from a solution (12), such as the wastewater from a chemical mechanical polishing process. The method comprises contacting a solution (12) containing solid particle... | 05/23/2006 |
| 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 |
| 7018529 | System for producing ultrapure water The ultrapure water producing system produces ultrapure water with high purity and remarkably low content of metals even just after restart of operation thereof. Water sent through the pump 3 or 4 into a line 8 flows through a heat exchanger ... | 03/28/2006 |
| 7018593 | Base metal recovery from a tailings dump by bacterial oxidation A method of recovering base metal from a tailings dump which includes the steps of: aerating a surface layer of the dump; adjusting the pH and the moisture content of the surface layer to provide conditions favourable for bacterial oxidation of sulphide minerals; al... | 03/28/2006 |
| 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 |
| 6969466 | Purification of ammonia Highly pure aqueous solution of ammonia, typically electronics grade for use in semiconductor manufacturing is prepared by passing a solution of ammonia through at least one cation exchange resin bed to remove substantially all of the cation contaminants; subsequent... | 11/29/2005 |
| 6919030 | Process for recovering cyanide from copper-containing feed material A process for recovering cyanide from feed material containing cyanide and copper involves the steps of: (a) contacting the feed material with a strong base anion exchange resin whereby copper and cyanide from the feed material are adsorbed onto the resin; (b) conta... | 07/19/2005 |
| 6896808 | Recovery of metal values from aqueous solutions and slurries The invention generally relates to a process for the recovery or removal of metal species from a solution or slurry comprising the steps of: a) contacting the solution or slurry with a polymeric material, selected from the group consisting of a solid superhydrophili... | 05/24/2005 |
