Global Patent Index - EP 2021529 A2

EP 2021529 A2 2009-02-11 - METHOD FOR MAKING ANODES FOR ALUMINUM PRODUCTION BY FUSED-SALT ELECTROLYSIS, RESULTING ANODES AND USE THEREOF

Title (en)

METHOD FOR MAKING ANODES FOR ALUMINUM PRODUCTION BY FUSED-SALT ELECTROLYSIS, RESULTING ANODES AND USE THEREOF

Title (de)

VERFAHREN ZUR HERSTELLUNG VON ANODEN FÜR DIE HERSTELLUNG VON ALUMINIUM DURCH SCHMELZFLUSSELEKTROLYSE, RESULTIERENDE ANIONEN UND VERWENDUNG DAVON

Title (fr)

PROCEDE DE FABRICATION D'ANODES POUR LA PRODUCTION D'ALUMINIUM PAR ELECTROLYSE IGNEE, LESDITES ANODES ET LEUR UTILISATION

Publication

EP 2021529 A2 (FR)

Application

EP 07731426 A

Priority

  • FR 2007000784 W
  • FR 0604286 A

Abstract (en)

[origin: WO2007132081A2] The invention concerns a method for making anodes used for aluminum production by fused-salt electrolysis, said anodes comprising an anode rod made of conductive metal and at least one carbon-containing block, or anode block. Said method includes at least the following steps: a) providing an anode rod; b) providing a new anode block; c) fixing one end of the anode rod on the anode block, so as to provide proper mechanical engagement and proper electrical connection between said rod and said anode block. Said method is characterized in that, before, during or after step c) but before installing said anode in the electrolytic cell, it consists, at least on part of the upper surface of said anode block, in depositing a protective layer of controlled thickness, typically between 5 and 25 cm, consisting of a material resistant to the temperature and to the corrosion by the environment prevailing above the electrolytic solution.

IPC 8 full level (invention and additional information)

C25C 3/12 (2006.01)

CPC (invention and additional information)

C25C 3/125 (2013.01); Y10T 29/53204 (2013.01)

Citation (search report)

See references of WO 2007132081A3

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK RS

EPO simple patent family

FR 2900938 A1 20071116; FR 2900938 B1 20080620; AU 2007251461 A1 20071122; AU 2007251461 B2 20111027; CA 2651803 A1 20071122; CN 101443484 A 20090527; EP 2021529 A2 20090211; NO 20085190 A 20090216; RU 2008149095 A 20100620; US 2009250355 A1 20091008; US 7976688 B2 20110712; WO 2007132081 A2 20071122; WO 2007132081 A3 20080807; ZA 200809009 B 20091230

INPADOC legal status


2013-06-05 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20121201

2009-08-19 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) (DELETED)

2009-02-11 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20081022

2009-02-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

2009-02-11 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL BA HR MK RS