EP 0931182 B1 20011205 - ULTRASTABLE ANODES FOR ALUMINUM PRODUCTION CELLS
Title (en)
ULTRASTABLE ANODES FOR ALUMINUM PRODUCTION CELLS
Title (de)
ANODEN MIT HOHER STABILITÄT FÜR ALUMINIUMPRODUKTIONSZELLEN
Title (fr)
ANODES ULTRASTABLES POUR CELLULES DE PRODUCTION D'ALUMINIUM
Publication
Application
Priority
- US 9716865 W 19970923
- US 9615176 W 19960923
Abstract (en)
[origin: WO9812363A1] An anode 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 selected from silicon, tin, zinc, vanadium, indium, hafnium, tungsten, elements from the lanthanide series starting from praesodymium, and misch metal. The micropyretic reaction product contains metallic and intermetallic phases, with a composite oxide surface produced in-situ by anodic polarization of the porous micropyretic reaction product in a molten fluoride electrolyte containing dissolved alumina, or by high temperature treatment in an oxidizing gas. The composite oxide surface usually comprises an iron-rich relatively dense outer portion and an aluminate-rich relatively porous inner portion.
IPC 1-7
IPC 8 full level
B22F 3/23 (2006.01); C22C 1/04 (2006.01); C25C 3/06 (2006.01); C25C 3/12 (2006.01); C25C 7/02 (2006.01)
CPC (source: EP)
B22F 3/23 (2013.01); C22C 1/047 (2023.01); C25C 3/06 (2013.01); C25C 3/12 (2013.01); C25C 7/02 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT NL
DOCDB simple family (publication)
WO 9812363 A1 19980326; CA 2269727 A1 19980326; DE 69708903 D1 20020117; DE 69708903 T2 20020627; EP 0931182 A1 19990728; EP 0931182 B1 20011205
DOCDB simple family (application)
US 9716865 W 19970923; CA 2269727 A 19970923; DE 69708903 T 19970923; EP 97942654 A 19970923