EP 2862962 A4 20151209 - ELECTROLYTE USED FOR ALUMINUM ELECTROLYSIS AND ELECTROLYSIS PROCESS USING THE ELECTROLYTE
Title (en)
ELECTROLYTE USED FOR ALUMINUM ELECTROLYSIS AND ELECTROLYSIS PROCESS USING THE ELECTROLYTE
Title (de)
ELEKTROLYT ZUR ELEKTROLYSE VON ALUMINIUM UND ELEKTROLYSEVERFAHREN MIT DEM ELEKTROLYT
Title (fr)
ÉLECTROLYTE UTILISÉ POUR ÉLECTROLYSE D'ALUMINIUM ET PROCÉDÉ D'ÉLECTROLYSE UTILISANT L'ÉLECTROLYTE
Publication
Application
Priority
- CN 201210188422 A 20120611
- CN 201310024018 A 20130123
- CN 2013076442 W 20130530
Abstract (en)
[origin: EP2862962A1] The present invention relates to an electrolyte for aluminum electrolysis and an electrolysis process using the electrolyte. The electrolyte in the present invention employs a pure fluoride salt system and is composed of the following components by mass percent: 20-29.9% of NaF, 60.1-66% of AlF 3 , 3-10% of LiF, 4-13.9% of KF and 3-6% of Al 2 O 3 , wherein the molar ratio of NaF to AlF 3 is 0.6-0.995; or the electrolyte is composed of the following components by mass percent: 30-38% of NaF, 49-60% of AlF 3 , 1-5% of LiF, 1-6% of KF and 3-6% of Al 2 O 3 , wherein the molar ratio of NaF to AlF 3 is 1.0-1.52. The electrolyte provided in the present invention has low liquidus temperature, good alumina solubility and high electric conductivity, and plays good roles in reducing energy consumption, enhancing current efficiency and improving working environment in the electrolysis process.
IPC 8 full level
C25C 3/18 (2006.01)
CPC (source: EA EP KR US)
C25C 3/18 (2013.01 - EA EP KR US)
Citation (search report)
- [XI] WO 9941431 A1 19990819 - NORTHWEST ALUMINUM TECHNOLOGY [US]
- [XI] NZ 538777 A 20070223 - MOLTECH INVENT S
- [XI] ALEXANDER DEDYUKHIN ET AL: "Electrical conductivity of the (KF-AlF3)-NaF-LiF Molten System with Al2O3 additions at Low Cryolite Ratio", ECS TRANSACTIONS, 1 January 2009 (2009-01-01), pages 317 - 324, XP055063821, DOI: 10.1149/1.3159336
- See references of WO 2013185540A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2862962 A1 20150422; EP 2862962 A4 20151209; AP 2015008185 A0 20150131; AU 2013275997 A1 20150122; AU 2013275997 B2 20160616; CA 2876345 A1 20131219; CA 2876345 C 20170314; EA 032047 B1 20190329; EA 201492228 A1 20150529; IN 211DEN2015 A 20150612; KR 101801453 B1 20171124; KR 20150022995 A 20150304; US 2015122665 A1 20150507; WO 2013185540 A1 20131219; ZA 201409514 B 20160629
DOCDB simple family (application)
EP 13804761 A 20130530; AP 2015008185 A 20130530; AU 2013275997 A 20130530; CA 2876345 A 20130530; CN 2013076442 W 20130530; EA 201492228 A 20130530; IN 211DEN2015 A 20150109; KR 20157000521 A 20130530; US 201314407314 A 20130530; ZA 201409514 A 20141223