Global Patent Index - EP 1109952 A1

EP 1109952 A1 20010627 - MULTI-LAYER NON-CARBON METAL-BASED ANODES FOR ALUMINIUM PRODUCTION CELLS

Title (en)

MULTI-LAYER NON-CARBON METAL-BASED ANODES FOR ALUMINIUM PRODUCTION CELLS

Title (de)

MEHRSCHICHTIGE, KOHLENSTOFFFREIE ANODEN AUF BASIS VON METALLEN FÜR ALUMINIUM-ELEKTROGEWINNUNGSZELLEN

Title (fr)

ANODES MULTICOUCHES NON CARBONEES A BASE DE METAL POUR CELLULES DE PRODUCTION D'ALUMINIUM

Publication

EP 1109952 A1 20010627 (EN)

Application

EP 99931413 A 19990730

Priority

  • IB 9901357 W 19990730
  • IB 9900015 W 19990108
  • US 12620698 A 19980730
  • US 12683998 A 19980730

Abstract (en)

[origin: WO0006800A1] 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 series of superimposed, adherent, electrically conductive layers. These layers consist of at least one layer on the core structure constituting a barrier substantially impervious to monoatomic oxygen and molecular oxygen; one or more intermediate, protective layers on the oxygen barrier layer(s) which remain inactive in the reactions for the evolution of oxygen gas; and an electrochemically active layer for the oxidation reaction of oxygen ions present at the anode/electrolyte interface into nascent monoatomic oxygen, as well as for subsequent reaction for the formation of gaseous biatomic oxygen. The active layer comprises at least one transition metal and/or an oxide thereof (excluding the lanthanides and actinides and their oxides alone).

IPC 1-7

C25C 3/12

IPC 8 full level

C25C 3/06 (2006.01); C25C 3/12 (2006.01)

CPC (source: EP)

C25C 3/06 (2013.01); C25C 3/12 (2013.01)

Citation (search report)

See references of WO 0006800A1

Designated contracting state (EPC)

DE ES GB

DOCDB simple family (publication)

WO 0006800 A1 20000210; AU 4794599 A 20000221; DE 69921491 D1 20041202; DE 69921491 T2 20051027; EP 1109952 A1 20010627; EP 1109952 B1 20041027; ES 2229728 T3 20050416

DOCDB simple family (application)

IB 9901357 W 19990730; AU 4794599 A 19990730; DE 69921491 T 19990730; EP 99931413 A 19990730; ES 99931413 T 19990730