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| Number | Title | Issue Date |
| 7758740 | Electrochemical reduction of metal oxides An electrolytic cell for electrochemically reducing metal oxide powders and/or pellets is disclosed. The cell includes a cathode (25) in the form of a plate that has an upper surface for supporting metal oxide powders and/or pellets. The plate is horizontally... | 07/20/2010 |
| 7410562 | Thermal and electrochemical process for metal production A system for purification of high value metals comprises an electrolytic cell in which an anode formed of a composite of a metal oxide of the metal of interest with carbon is electrochemically reduced in a molten salt electrolyte. ... | 08/12/2008 |
| 7267754 | Porous membrane electrochemical cell for uranium and transuranic recovery from molten salt electrolyte An improved process and device for the recovery of the minor actinides and the transuranic elements (TRU's) from a molten salt electrolyte. The process involves placing the device, an electrically non-conducting barrier between an anode salt and a cathode salt. The ... | 09/11/2007 |
| 7255783 | Use of infrared imaging to reduce energy consumption and fluoride consumption Operations in an electrolytic cell for producing aluminum are controlled by sensing infrared radiation on an outer surface of a cell chamber to determine an actual temperature. When the actual temperature is greater than a target temperature, a crust hole is repaire... | 08/14/2007 |
| 7235161 | Stable anodes including iron oxide and use of such anodes in metal production cells Stable anodes comprising iron oxide useful for the electrolytic production of metal such as aluminum are disclosed. The iron oxide may comprise Fe3O4, Fe2O3, FeO or a combination thereof. During the electrolytic aluminum p... | 06/26/2007 |
| 7208075 | Reduction of metal oxides in an electrolytic cell A method of reducing a metal oxide in a solid state, in an electrolytic cell, is provided, as is an electrolytic cell suitable for performing the method. The cathode of the electrolytic cell is formed at least in part from the metal oxide to be reduced, and the elec... | 04/24/2007 |
| 7182851 | Electrolytic commercial production of hydrogen from hydrocarbon compounds This invention concerns the commercial production of electrolytic hydrogen from coal and other hydrocarbon compounds. The process provides high capacity and low impedance compared to conventional diaphragm electrolytic cells. The hydrogen produced is suitable for co... | 02/27/2007 |
| 7169270 | Inert anode electrical connection An improved electrical connection between an inert anode and a conductor rod is disclosed. The conductor rod has a smaller diameter than a hole in the anode such that a gap is provided between the conductor rod and the anode. The gap is filled with an electrically c... | 01/30/2007 |
| 7169285 | Low temperature refining and formation of refractory metals A low temperature method for reducing and purifying refractory metals, metal compounds, and semi-metals using a catalyst. Using this invention, TiO2 can be reduced directly to Ti metal at room temperature. The catalyst is an ion in an electrolyte that cat... | 01/30/2007 |
| 7112269 | Measuring duct offgas temperatures to improve electrolytic cell energy efficiency Operations in a cell for electrolytic production of aluminum are controlled by establishing a standard rate of addition of aluminum fluoride to a molten electrolyte covered by a crust; establishing a target temperature for a duct carrying offgas from a chamber conta... | 09/26/2006 |
| 7090760 | Method of reducing spent oxide nuclear fuel into nuclear-fuel metal using LiCl-LiO salt, cathode electrode assembly used in the method, and reduction device including the assembly Disclosed are a method of reducing spent oxides nuclear fuel to nuclear-fuel metal, in which metal oxides are reduced to metals using an electrochemical reduction device with LiCl—Li2O salt as an electrolyte, a cathode electrode assembly used in the met... | 08/15/2006 |
| 7048774 | Recovery of metal values from cermet Cermet material obtained from unused inert anodes, used inert anodes and cermet used in the production of inert anodes is beneficiated into a nonferrous metal concentrate composition from which metal values contained in the composition may be readily recovered by us... | 05/23/2006 |
| 7014881 | Synthesis of multi-element oxides useful for inert anode applications An inert anode 50, for use in an electrolytic cell 12 for producing metals such as aluminum, is made by providing chemical source materials 100 such as at least two of metal salts, metal particles, or metal oxides and dissolving them to form a s... | 03/21/2006 |
| 6972107 | System for direct electrowinning of copper A system and process for recovering copper from a copper-containing ore, concentrate, or other copper-bearing material to produce high quality cathode copper from a leach solution without the use of copper solvent extraction techniques or apparatus. A process for re... | 12/06/2005 |
| 6968990 | Fabrication and utilization of metallic powder prepared without melting A metallic alloy made of metallic constituent elements is fabricated and utilized by first furnishing a mixture of nonmetallic precursor compounds of the metallic constituent elements, and thereafter chemically reducing the mixture of nonmetallic precursor compounds... | 11/29/2005 |
| 6958115 | Low temperature refining and formation of refractory metals This invention discloses and claims the low temperature reduction and purification of refractory metals, metal compounds, and semi-metals. The reduction is accomplished using non-aqueous ionic solvents in an electrochemical cell with the metal entity to be reduced. ... | 10/25/2005 |
| 6921473 | Electrolytic reduction of metal oxides such as titanium dioxide and process applications A method of removing oxygen from a solid metal, metal compound or semi-metal M1O by electrolysis in a fused salt of M2Y or a mixture of salts, which comprises conducting electrolysis under conditions such that reaction of oxygen rather than M2 deposition occurs at a... | 07/26/2005 |
| 6911134 | Three-electrode metal oxide reduction cell A method of electrochemically reducing a metal oxide to the metal in an electrochemical cell is disclosed along with the cell. Each of the anode and cathode operate at their respective maximum reaction rates. An electrolyte and an anode at which oxygen can be evolve... | 06/28/2005 |
| 6730210 | Low temperature alkali metal electrolysis A low temperature alkali metal electrolysis process is provided. The process comprises carrying out the electrolysis in the presence of a co-electrolyte and an alkali metal halide. The co-electrolyte comprises (1) a nitrogen-containing compound and optionally one or... | 05/04/2004 |
| 6723221 | Insulation assemblies for metal production cells Insulation assemblies provide reduced heat loss from electrolytic metal production cells such as inert anode aluminum production cells. The insulation assemblies may be located at the end, side and/or center aisles of the cell, and may be supported by the anodes and... | 04/20/2004 |
| 6663763 | Reduction of metal oxides in an electrolytic cell A method of reducing a metal oxide in a solid state, in an electrolytic cell, is provided, as is an electrolytic cell suitable for performing the method. The cathode of the electrolytic cell is formed at least in part from the metal oxide to be reduced, a... | 12/16/2003 |
| 6663689 | Process for direct electrowinning of copper A system and process for recovering copper from a copper-containing ore, concentrate, or other copper-bearing material to produce high quality cathode copper from a leach solution without the use of copper solvent extraction techniques or apparatus. A pro... | 12/16/2003 |
| 6599413 | Method and apparatus for the treatment of a melt A method and apparatus for adding a metal, for example sodium, to a melt of a material, for example aluminum, in a vessel, in which a molten compound of the metal or a solution of a compound of the metal is provided in a container (12), the container bein... | 07/29/2003 |
| 6579438 | Molten salt electrolytic cell having metal reservoir An electrolysis cell (10) for producing a molten metal having a density less than a density of a molten electrolyte used for producing the metal in the cell. The cell includes a section (14) for the electrolysis of a salt of the the metal contained in a m... | 06/17/2003 |
| 6451089 | Process for direct electrowinning of copper A system and process for recovering copper from a copper-containing ore, concentrate, or other copper-bearing material to produce high quality cathode copper from a leach solution without the use of copper solvent extraction techniques or apparatus. A pro... | 09/17/2002 |
| 6440294 | Crust hole repair for electrolytic cells A process for repairing a hole in the crust of an electrolytic cell. The hole is repaired by covering it with a receptacle containing solid particles. The receptacle comprises a polymeric material. More preferably, the receptacle comprises a cellulosic ma... | 08/27/2002 |
| 6402926 | Application of refractory protective coatings on the surface of electrolytic cell components An adherent protective coating of a refractory material is produced on the surface of carbonaceous, refractory, ceramic, metallic or other materials serving as components of electrolytic cells operating at high temperature, by applying to such surfaces a ... | 06/11/2002 |
| 6383255 | Method for recovering the valuable metal content of a sulphuric acid leaching solution A method for winning the valuable metal content of a leaching solution acidified with sulphuric acid, by solvent extraction and electrowinning and a following final product winning stage, for instance an electrowinning stage, wherein the pH of the leachin... | 05/07/2002 |
| 6368486 | Low temperature alkali metal electrolysis A low temperature alkali metal electrolysis process for carrying out the electrolysis in the presence of a co-electrolyte and an alkali metal halide. The co-electrolyte comprises (1) a nitrogen-containing compound and optionally one ore more Group IB hali... | 04/09/2002 |
| 6309529 | Method for producing sputtering target material The invention provides a method for producing a sputtering target material including electrolyzing a molten salt mixture containing a precious metal salt and a solvent salt, to thereby deposit a precious metal or a precious metal alloy. The method enables... | 10/30/2001 |
| 6299742 | Apparatus for metal extraction An amperometric in situ apparatus and technique for measuring the concentrations and transport properties of easily dissociable oxides in slags is described. The technique consists of a combination of different measurements utilizing an electrolyte to sep... | 10/09/2001 |
| 6221232 | Electrolytic refining method for gallium and apparatus for use in the method An electrolytic refining method for gallium by depositing refined gallium on a cathode in an electrolytic solution using a melted raw gallium material as an anode in an electrolytic cell is disclosed, comprising applying a centrifugal force to the melted ... | 04/24/2001 |
| 6187168 | Electrolysis in a cell having a solid oxide ion conductor An electrolytic cell and electrolytic process for producing a metal by reduction of a metal oxide dissolved in a molten salt bath containing at least one chloride and at least one fluoride. A solid conductor of oxide ions is interposed between the anode a... | 02/13/2001 |
| 6146513 | Electrodes, electrolysis apparatus and methods using uranium-bearing ceramic electrodes, and methods of producing a metal from a metal compound dissolved in a molten salt, including the electrowinning of aluminum The present invention includes uranium-bearing ceramic phase electrodes and electrolysis apparatus and electrolysis methods featuring same, including methods of metal production and the like by the electrolytic reduction of oxides or salts of the respecti... | 11/14/2000 |
| 6074545 | Process for the electrolytic production of metals A Process for the electrolytic production of metals particularly titanium and alloys starting from the corresponding compounds is disclosed, by means of an apparatus for the electrochemical extraction including: (1) a cathode-crucible containing a mass of... | 06/13/2000 |
| 5976345 | Method and apparatus for metal extraction and sensor device related thereto An amperometric in situ apparatus and technique for measuring the concentrations and transport properties of easily dissociable oxides in slags is described. The technique consists of a combination of different measurements utilizing an electrolyte to sep... | 11/02/1999 |
| 5865980 | Electrolysis with a inert electrode containing a ferrite, copper and silver An inert electrode material is made by reacting at an elevated temperature a mixture preferably comprising iron oxide, at least one other metal oxide, copper and silver. The reaction produces a material having ceramic phase portions and alloy phase portio... | 02/02/1999 |
| 5855757 | Method and apparatus for electrolysing light metals The present invention provides a new and useful process for the production of a molten metal by electrolysis in an electrolytic cell having an electrolysis compartment, a metal recovery compartment, and a partition separating upper parts of said compartme... | 01/05/1999 |
| 5735930 | Method for resources recovery from refractory carbonaceous magma A method of refining magma, which includes silicon carbide, basaltic clay, and other insoluble components, including the steps of blending the magma with monovalent alkali hydroxides and a chemical oxidizing agent, melting the magma, and injecting oxygen ... | 04/07/1998 |
| 5730855 | Hoist apparatus and method for positioning anode in smelting furnace An anode positioning hoist supported on an overhead crane used in a smelting apparatus including a cathode with an upwardly facing surface and an anode with a downwardly facing surface. The anode positioning hoist includes a pair of channel members defini... | 03/24/1998 |
