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Assignee: Moltech Invent S.A.


Location: Luxembourg, LU
No. of patents: 41

1    
NumberTitleIssue Date
7811425Non-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
7740745Non-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
7255894Non-carbon anodes for aluminium electrowinning and other oxidation resistant components with slurry-applied coatings
A method of manufacturing a component, in particular an aluminium electrowinning anode, for use at elevated temperature in an oxidising and/or corrosive environment comprises: applying onto a metal-based substrate layers of a particle mixture containing iron oxide p...
08/14/2007
7255893Protection 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
6998032Metal-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
6913682Cells for the electrowinning of aluminium having dimensionally stable metal-based anodes
A cell for the electrowinning of aluminium comprising one or more anodes (10), each having a metal-based anode substrate, for instance comprising a metal core (11) covered with an metal layer 12, an oxygen barrier layer (13), one or more ...
07/05/2005
6878247Metal-based anodes for aluminium electrowinning cells
An anode of a cell for the electrowinning of aluminium comprises a nickel-iron alloy substrate having an openly porous nickel metal rich outer portion whose surface is electrochemically active. The outer portion is optionally covered with an external integral nickel...
04/12/2005
6692620Aluminium electrowinning cell with sidewalls resistant to molten electrolyte
A drained cathode cell for the electrowinning of aluminium comprises a cell bottom (20) arranged to collect product aluminium and thermic insulating sidewalls (55,55') lined with a molten electrolyte resistant sidewall lining (50) which is made of materia...
02/17/2004
6656340Aluminium production cell design
A cell of advanced design for the production of aluminium by the electrolysis of an aluminium compound dissolved in a molten electrolyte, has a cathode (30) of drained configuration, and at least one non-carbon anode (10) facing the cathode both covered b...
12/02/2003
6638412Prevention of dissolution of metal-based aluminium production anodes
A method of inhibiting dissolution of a transition metal alloy anode (40) of an aluminium electrowinning cell comprises providing a sodium-inert layer (11,20,50,50') on a sodium-active cathodic cell material (15), such as carbon, and electrolysing alumina...
10/28/2003
6540887Aluminum electrowinning cells with oxygen-evolving anodes
A cell for the electrowinning of aluminium comprises at least one non-carbon metal-based anode (10) having an electrically conductive metallic structure (12, 13, 15) which is suspended substantially parallel to a facing cathode (20, 21, 22). Such metallic...
04/01/2003
6436273Drained cathode aluminium electrowinning cell with alumina distribution
An electrolytic cell for the electrowinning of aluminium comprises a cathode cell bottom provided with a series of sloped active cathode surfaces (11, 12) down which produced aluminium (60) is drained, and a series of recessed grooves or channels (20), be...
08/20/2002
6436250Slurry and method for producing refractory boride bodies and coatings for aluminium electrowinning cell apparatus
A refractory boride body or coating made of a boride of titanium, chromium, vanadium, ziconium, hafnium, niobium, tantalum, molybednum and cerium is produced from a slurry of the refractory boride or a precursor in a collidal carrier preferably composed o...
08/20/2002
6413406Electrocatalytically active non-carbon metal-based anodes for aluminium production cells
A non-carbon, metal-based high temperature resistant anode of a cell for the production of aluminum has a highly conductive metal-based substrate coated with one or more electrically conductive adherent intermediate protective layers and an outer layer wh...
07/02/2002
6402926Application 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
6372099Cells for the electrowinning of aluminium having dimensionally stable metal-based anodes
A cell for the electrowinning of aluminium comprising one or more anodes, each having a metal-based anode substrate, comprising a metal core covered with an metal layer, an oxygen barrier layer, one or more intermediate layers and an iron layer. The anode...
04/16/2002
6365018Surface coated non-carbon metal-based anodes for aluminium production cells
A non-carbon, metal-based, high temperature resistant, electrically conductive and electrochemically active anode of an aluminum production cell has a metal-based substrate having an adherent coating applied prior to its immersion into the electrolyte and...
04/02/2002
6361680Ultrastable cell component for aluminum production cells and method
Method and cell component for the electrowinning of aluminum by the electrolysis of alumina dissolved in a molten fluoride electrolyte comprises a porous micropyretic reaction product of nickel, aluminum, iron, copper and at least one additive element sel...
03/26/2002
6358393Aluminum production cell and cathode
A cell for the production of aluminium by the electrolysis of an aluminium compound dissolved in a molten electrolyte, in which an outer mechanical structure forming an outer shell (21) houses therein one or more inner electrically-conductive cathode hold...
03/19/2002
6338785Start-up of aluminum electrowinning cells
A method of protecting a cathode during the start-up procedure of an aluminum electrowinning cell where the cathode is optionally coated with an aluminium-wettable refractory material and when in use, aluminium is produced thereon. The start-up procedure ...
01/15/2002
6287447Method of producing aluminum in a drained cathode cell
Carbon-containing components of cells for the production of aluminium by the electrolysis of alumina dissolved in a cryolite-based molten electrolyte are protected from attack by liquid and/or gaseous components of the electrolyte in the form of elements,...
09/11/2001
6258246Aluminium electrowinning cell with sidewalls resistant to molten electrolyte
A drained cathode cell for the electrowinning of aluminium comprises a cell bottom (20) arranged to collect product aluminium and thermic insulating sidewalls (40) lined with a molten electrolyte resistant sidewall lining (50), in particular containing si...
07/10/2001
6228424Method and apparatus for impregnation of porous bodies for protection against oxidation
An open-pored body (11), in particular a carbon component of an aluminum production cell, which is to be exposed to oxidizing conditions or chemical attack at high temperatures is treated to protect the body against oxidation or corrosion at high temperat...
05/08/2001
6139704Application of refractory borides to protect carbon-containing components of aluminum production cells
Carbon-containing components of cells for the production of aluminium by the electrolysis of alumina dissolved in a cryolite-based molten electrolyte are protected from attack by liquid and/or gaseous components of the electrolyte in the form of elements,...
10/31/2000
6103090Electrocatalytically active non-carbon metal-based anodes for aluminium production cells
A non-carbon, metal-based high temperature resistant anode of a cell for the production of aluminium has a metal-based substrate coated with one or more electrically conductive adherent applied layers, at least one electrically conductive layer being elec...
08/15/2000
6093304Cell for aluminium electrowinning
An electrolytic cell for the electrowinning of aluminium from alumina dissolved in a halide-containing molten electrolyte, has a cathode cell bottom made of a series of carbon cathode blocks (10) connected side-by-side by glue or ramming paste, each one p...
07/25/2000
6077415Multi-layer non-carbon metal-based anodes for aluminum production cells and method
A composite, high-temperature resistant, non-carbon metal-based anode of a cell for the electrowinning of aluminium comprises a metal-based core structure of low electrical resistance, for connecting the anode to a positive current supply, coated with a s...
06/20/2000
5985114Carbon bodies resistant to deterioration by oxidizing gases
A carbon body, in particular a pre-baked anode of an electrolytic cell for the production of aluminium by the electrolysis of alumina in a molten fluoride electrolyte is treated over its surfaces to improve the resistance thereof to deterioration during o...
11/16/1999
5904828Stable anodes for aluminium production cells
An anode for the electrowinning of aluminium by the electrolysis of alumina dissolved in a molten fluoride electrolyte comprises a porous combustion synthesis product of nickel, aluminium, iron, copper and optional doping elements in the amounts 50-90 wt....
05/18/1999
5888360Cell for aluminium electrowinning
An electrolytic cell for the electrowinning of aluminum from alumina dissolved in a halide-containing molten electrolyte, has a cathode cell bottom made of a series of carbon cathode blocks (10) connected side-by-side by glue or ramming paste, each one pr...
03/30/1999
5865981Aluminium-immersed assembly and method for aluminium production cells
A cell for the production of aluminium by the electrolysis of a molten electrolyte, in particular the electrolysis of alumina dissolved in a molten fluoride-based electrolyte such as cryolite, comprises anodes immersed in the molten electrolyte above a ce...
02/02/1999
5720860Micropyretically-produced components of aluminum production cells
Components of aluminium production cells made of composite materials comprising ordered aluminide compounds of at least one of nickel, iron and titanium, for use in particular as anodes and cathodes and cell linings in aluminium production cells containin...
02/24/1998
5679224Treated carbon or carbon-based cathodic components of aluminum production cells
Carbon or carbon-based cathodes and cell bottoms of electrolytic cells for the production of aluminium in particular by the electrolysis of alumina in a molten halide electrolyte such as cryolite, are treated to better resist intercalation of sodium in th...
10/21/1997
5651874Method for production of aluminum utilizing protected carbon-containing components
Carbon-containing components (1, 2, 5) of cells for the production of aluminium (8) by the electrolysis of alumina dissolved in a cryolite-based molten electrolyte (7) are protected from attack by liquid and/or gaseous components of the electrolyte (7) in...
07/29/1997
5618403Maintaining protective surfaces on carbon cathodes in aluminium electrowinning cells
A cell for the electrowinning of aluminium by the electrolysis of alumina dissolved in a molten fluoride-based electrolyte comprises a cathode composed of a carbon body having an aluminium resistant aluminium-wettable surface layer containing particulate ...
04/08/1997
5578174Conditioning of cell components for aluminum production
Components of electrolytic cells for the production of aluminum in particular by the electrolysis of alumina in a molten fluoride electrolyte, made of carbon or other microporous material which remains stable or may be consumed in the cell operating condi...
11/26/1996
5534130Application of phosphates of aluminum to carbonaceous components of aluminum production cells
Carbon-containing components of cells for the production of aluminum by the electrolysis of alumina dissolved in a cryolite-based molten electrolyte are protected from attack by liquid and/or gaseous components of the electrolyte in the form of elements, ...
07/09/1996
5409589Production of carbon-based composite materials as components of aluminum production cells
A method of producing a component of an aluminium production cell made of a carbon-based composite material containing a refractory hard metal boride, carbide, oxide, nitride or combinations or mixtures thereof and aluminium as metal, alloy or as an alumi...
04/25/1995
5397450Carbon-based bodies in particular for use in aluminium production cells
A carbon containing material for use in particular as an anode of electrolytic cells for the production of aluminum by the electrolysis of alumina in a cryolite-based electrolyte, consists substantially of a mixture of one or more particulate carbonaceous...
03/14/1995
5346608Method for obtaining neodymium or neodymium-iron alloy by electrolysis of melts containing neodymium compounds
Neodymium and neodymium-iron alloys are obtained by electrolysis of a neodymium salt melt using magnetite as the anode material. The cathode is non-consumable or is made of iron to be consumed and form a neodymium-iron alloy. The electrolysis is preferabl...
09/13/1994
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