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| Number | Title | Issue Date |
| 7985326 | 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. ... | 07/26/2011 |
| 7846308 | Non-carbon anodes An anode for electrowinning of aluminium from alumina comprises a cobalt-containing metallic outer part that is covered with an integral oxide layer containing predominantly cobalt oxide CoO. The integral oxide layer can be formed by surface oxidation of cobalt from... | 12/07/2010 |
| 7811425 | Non-carbon anodes with active coatings An anode for electrowinning aluminium comprises an electrically conductive substrate that is covered with an applied electrochemically active coating comprising a layer that contains predominantly cobalt oxide CoO. The CoO layer can be connected to the substrate thr... | 10/12/2010 |
| 7799185 | 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 ... | 09/21/2010 |
| 7740745 | Non-carbon anodes with active coatings A cell for electrowinning aluminium from alumina, comprises: a metal-based anode having an electrochemically active outer part comprising a layer that contains predominantly cobalt oxide CoO; and a fluoride-containing molten electrolyte in which the active anode sur... | 06/22/2010 |
| 7431812 | Surface oxidised nickel-iron metal anodes for aluminium production An anode for the electrowinning of aluminium by the electrolysis of alumina in a molten fluoride electrolyte has an electrochemically active integral outside oxide layer obtainable by surface oxidation of a metal alloy which consists of 20 to 60 weight % nickel; 5 t... | 10/07/2008 |
| 7425284 | Inert anode for the production of aluminium by fused bath electrolysis and method of making this anode The purpose of the invention is a process for making a solid part designed to form all or part of an anode for the production of aluminium by fused bath electrolysis, containing a cermet formed from at least one metallic oxide such as a mixed oxide with spinel struc... | 09/16/2008 |
| 7422624 | Method for operating one or more electrolysiscells for production of aluminium A method for operating one or more electrolysis cells (43, 154, 243) for production of aluminium, the cell comprising inert or substantially inert anodes, where an oxygen containing gas (21, 126, 221) evolved by the electrolysis process in the cell is ... | 09/09/2008 |
| 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 |
| 7410561 | 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... | 08/12/2008 |
| 7384521 | Method for reducing cell voltage and increasing cell stability by in-situ formation of slots in a Soderberg anode A self-baking, Soderberg type carbon anode (40) for use in an aluminum electrolyses cell (1) to form product aluminum (11), where the anode (40) is consumable in molten electrolyte (12) in the cell, the anode having top, bottom and... | 06/10/2008 |
| 7347920 | Production, refining and recycling of lightweight and reactive metals in ionic liquids Lightweight and reactive metals can be produced from ore, refined from alloy, and recycled from metal matrix composites using electrolysis in electrolytes including an ionic liquid containing a metal chloride at or near room temperature. Low electric energy consumpt... | 03/25/2008 |
| 7344625 | Element for handling connectors for electrolytic cells which are used for the production of aluminum The present invention relates to a handling device for an anode connector provided with at least two side trunnions and a tightening screw. The connector is generally capable of cooperating with attachment hooks of an aluminum production cell used in fused bath elec... | 03/18/2008 |
| 7316765 | Apparatus and method for molten salt electrolytic bath control An apparatus for controlling a molten salt electrolyzer in which an electrolytic bath in a solid form as contained in the electrolyzer is melted to automatically attain a state allowing electrolysis, which apparatus comprises detecting means for detecting the change... | 01/08/2008 |
| 7300560 | Cathode block for aluminum refining and method for production thereof A cathode block for aluminum refining containing a calcined coke in a proportion of 15 to 100 wt %, characterized in that the calcined coke is prepared by mixing a heavy oil having a content of quinoline insoluble components of 10 to 25 wt % with 3 to 20 wt % of car... | 11/27/2007 |
| 7288180 | Electric current control method and apparatus for use in gas generators The invention provides a method and apparatus for current control in gas generators capable of generating a fluorine or fluoride gas by and in which the electrolysis can be maintained in an optimum condition, stable operation is possible and no manpower is demanded.... | 10/30/2007 |
| 7282133 | Cermet inert anode assembly heat radiation shield A method of protecting an inert anode assembly (16) operating in an electrolysis cell (10) for producing metal when an adjacent assembly (16′) is removed exposing remaining assemblies to low ambient temperatures (40) by utilizing heat r... | 10/16/2007 |
| 7255893 | Protection of non-carbon anodes and other oxidation resistant components with iron oxide-containing coatings A method of forming a dense and crack-free hematite-containing protective layer on a metal-based substrate for use in a high temperature oxidising and/or corrosive environment comprises applying onto the substrate a particle mixture consisting of: 60 to 99 95 weight... | 08/14/2007 |
| 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 |
| 7192508 | Devices to conduct current to or from the electrodes in electrolysis cells, methods for preparation thereof, and an electrolysis cell and a method for production of aluminum by electrolysis of alumina solved in a melted electrolyte Device (1) to conduct current to or from the electrodes of an electrolysis cell, which device in the direction towards the electrolysis cell comprises three types of segments; at least one outer segment (2) joined with at least one intermediate segment... | 03/20/2007 |
| 7179353 | Closed end slotted carbon anodes for aluminum electrolysis cells An electrolysis cell (10) contains a number of carbon anodes (12) having top, bottom and side surfaces, operating in molten electrolyte (17) in an aluminum electrolysis cell (10), where gas bubbles (28) are generated at the anode s... | 02/20/2007 |
| 7175749 | Method and device for detecting anode effects of an electrolytic cell for aluminum production Process for early detection of an anode effect in an aluminum production cell based on molten salt electrolysis. The cell comprises at least one anode, at least one cathode and cathode connecting conductors and anode connecting conductors. The process comprises: | 02/13/2007 |
| 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 |
| 7163963 | Chemically and thermally stabilized alumina for Fischer-Tropsch catalysts This invention is generally related to the field of Fischer-Tropsch catalysts. In particular, the present invention is related to a Fischer-Tropsch catalyst and method of making same. More particularly, the present invention discloses a catalyst comprising a support... | 01/16/2007 |
| 7141148 | Material for a dimensionally stable anode for the electrowinning of aluminum A material suitable for use as the active anode surface in the electrolytic reduction of alumina to aluminium metal defined by the formula: A1+xB1+δCdO4 where A is a divalent cation or a mixture of cations with a relative... | 11/28/2006 |
| 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 |
| 7107791 | Method for changing the boundary surface tension of a liquid glass piece and apparatus for performing said method The process according to the invention reduces the effort required to shape a glass piece. In this process a liquid glass piece is provided on a structured supporting surface of an electrically conducting base. A voltage is applied across the liquid glass piece by c... | 09/19/2006 |
| 7097747 | Continuous process electrorefiner A new device is provided for the electrorefining of uranium in spent metallic nuclear fuels by the separation of unreacted zirconium, noble metal fission products, transuranic elements, and uranium from spent fuel rods. The process comprises an electrorefiner cell. ... | 08/29/2006 |
| 7077945 | Cu—Ni—Fe anode for use in aluminum producing electrolytic cell A method of producing aluminum in an electrolytic cell containing alumina dissolved in an electrolyte, the method comprising the steps of providing a molten salt electrolyte at a temperature of less than 900° C. having alumina dissolved therein in an electrolytic c... | 07/18/2006 |
| 7036097 | Method for designing a cascade of digital filters for use in controling an electrolysis cell A method for designing a cascade of digital filters for use in the control of an electrolytic reduction cell by specifying the frequency and time response characteristics of the transfer function of the cascade of digital filters. The digital filters are exponential... | 04/25/2006 |
| 7033469 | Stable inert anodes including an oxide of nickel, iron and aluminum Ceramic inert anodes useful for the electrolytic production of aluminum are disclosed. The inert anodes comprise oxides of Ni, Fe and Al. The Ni—Fe—Al oxide inert anode materials have sufficient electrical conductivity at operation temperatures of aluminum produ... | 04/25/2006 |
| 7001494 | Electrolytic cell and electrodes for use in electrochemical processes An electrolytic cell with an anode and cathode for the electrolysis of hydrochloric acid and brine is provided. The anodes and cathodes of the present invention are made of a bulk ceramic or intermetallic material. ... | 02/21/2006 |
| 6998032 | Metal-based anodes for aluminium electrowinning cells An anode of a cell for the electrowinning of aluminium comprises a nickel-iron alloy substrate having a nickel metal rich outer portion with an electrolyte pervious integral nickel-iron oxide containing surface layer which adheres to the nickel metal rich outer port... | 02/14/2006 |
| 6977031 | Anode assembly An anode assembly for conducting electrical energy to an electrolytic smelting cell including an anode of high electrically conductive material connected to a yoke, the ends of the yoke being receivable within anodes, the yoke including a core of highly electrically... | 12/20/2005 |
| 6930586 | Carbon monoxide detector A carbon monoxide (CO) detection unit incorporates a sensor which is a film or layer of NixCo1-xOy where x is from 0.1 to 0.9, e.g., spinel. The CO is detected by measuring the change in the electrical properties of the sensor. The d... | 08/16/2005 |
| 6881308 | Electrochemical synthesis of ammonia A method for electrochemical synthesis of ammonia gas comprising providing an electrolyte between an anode and a cathode, providing hydrogen gas to the anode, oxidizing negatively charged nitrogen-containing species present in the electrolyte at the anode to form an... | 04/19/2005 |
| 6863788 | Interlocking wettable ceramic tiles An electrolytic cell for the reduction of aluminum having a layer of interlocking cathode tiles positioned on a cathode block. Each tile includes a main body and a vertical restraining member to prevent movement of the tiles away from the cathode block during operat... | 03/08/2005 |
| 6855234 | Sinter-bonded direct pin connections for inert anodes A sintered electrode assembly is made of an inert electrode (15) containing a sealed metal conductor (20) having a surface feature (30) such as a coating or wrapping which aids in bond formation with the inert electrode (15) at their inte... | 02/15/2005 |
| 6818106 | Inert anode assembly A solid material (12′) circumscribing an anode system (10) in an electrolysis apparatus is made from a mixture of cryolite and/or alumina (Al2O3), where the solid material (12′) contacts and surrounds the anodes (14,... | 11/16/2004 |
