EP 3475470 B1 20201125 - PROCESS FOR TREATING A SOLID CARBONACEOUS MATERIAL CONTAINING ALUMINUM, FLUORIDES AND SODIUM IONS
Title (en)
PROCESS FOR TREATING A SOLID CARBONACEOUS MATERIAL CONTAINING ALUMINUM, FLUORIDES AND SODIUM IONS
Title (de)
VERFAHREN ZUR BEHANDLUNG EINES FESTEN KOHLENSTOFFHALTIGEN MATERIALS, ENTHALTEND ALUMINIUM, FLUORIDE UND NATRIUMIONEN
Title (fr)
PROCÉDÉ DE TRAITEMENT D'UNE MATIÈRE CARBONÉE SOLIDE CONTENANT DE L'ALUMINIUM, DES FLUORURES ET DES IONS SODIUM
Publication
Application
Priority
- IT UA20164638 A 20160624
- IB 2017053699 W 20170621
Abstract (en)
[origin: WO2017221173A1] The present invention relates to a process for treating a solid carbonaceous material containing aluminum, fluorides and Na+ ions, comprising the following steps: (a) leaching said solid carbonaceous material with at least one aqueous alkaline solution to form: (i) an extraction solution comprising said aluminum in hydrosoluble form, said fluorides and said Na+ ions, and (ii) at least one solid insoluble residue; (b) separating said insoluble solid residue from said extraction solution; (c) subjecting said extraction solution free from said solid insoluble residue to a membrane electrolysis process to form at least one precipitate comprising said aluminum and at least one aqueous solution of NaOH. The above process is particularly suitable for the treatment of spent potlinings (SPLs) deriving from electrolytic reduction cells of alumina for the recovery of aluminum, fluorides, and sodium ions contained therein.
IPC 8 full level
C25C 3/08 (2006.01)
CPC (source: EP RU)
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
DOCDB simple family (publication)
WO 2017221173 A1 20171228; CN 109689939 A 20190426; CN 109689939 B 20210108; EP 3475470 A1 20190501; EP 3475470 B1 20201125; IT UA20164638 A1 20171224; RU 2019100218 A 20200724; RU 2019100218 A3 20200921; RU 2742864 C2 20210211
DOCDB simple family (application)
IB 2017053699 W 20170621; CN 201780038627 A 20170621; EP 17751126 A 20170621; IT UA20164638 A 20160624; RU 2019100218 A 20170621