EP 4058612 A4 20230816 - ARRANGEMENT AND METHOD FOR RECOVERING LITHIUM HYDROXIDE
Title (en)
ARRANGEMENT AND METHOD FOR RECOVERING LITHIUM HYDROXIDE
Title (de)
ANORDNUNG UND VERFAHREN ZUR RÜCKGEWINNUNG VON LITHIUMHYDROXID
Title (fr)
AGENCEMENT ET PROCÉDÉ DE RÉCUPÉRATION D'HYDROXYDE DE LITHIUM
Publication
Application
Priority
FI 2019050821 W 20191115
Abstract (en)
[origin: WO2021094647A1] The present invention relates to an arrangement and a method for recovering lithium hydroxide from a fresh feed comprising a mineral raw material containing lithium or a raw material containing lithium carbonate, or a mixture of these raw mate- rials,combined with a recycled solution and/or slurry containing lithium, by pulping the feed in the presence of water and alkali metal carbonate,leaching the obtained slurry twice, first at an elevated temperature, and secondly in an aqueous solution containing alkali earth metal hydroxide, separating the thus obtained slurry into solids that may be discarded,and a solution containing lithium hydroxide,whereby lithium hydroxide mono hydrate can be recovered from the solution by crystallising, and finally separating the solution and/or slurry obtained during the crystallization from the process and recycling it to one or more previous step, including the pulp- ing step,and optionally the first leaching step.
IPC 8 full level
C22B 3/02 (2006.01); C01D 15/02 (2006.01); C01F 11/18 (2006.01); C22B 3/12 (2006.01); C22B 3/14 (2006.01); C22B 26/12 (2006.01)
CPC (source: CN EP KR)
C01D 15/02 (2013.01 - CN EP KR); C01F 11/18 (2013.01 - EP KR); C22B 3/02 (2013.01 - EP KR); C22B 3/12 (2013.01 - EP KR); C22B 26/12 (2013.01 - EP KR); C01P 2006/80 (2013.01 - CN KR); Y02P 10/20 (2015.11 - EP)
Citation (search report)
- [E] WO 2019220004 A1 20191121 - OUTOTEC FINLAND OY [FI]
- [A] GB 1052747 A 19601230
- See references of WO 2021094647A1
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 2021094647 A1 20210520; AU 2019474270 A1 20220616; BR 112022009315 A2 20220809; CA 3160982 A1 20210520; CN 112811445 A 20210518; CN 215439699 U 20220107; EP 4058612 A1 20220921; EP 4058612 A4 20230816; KR 20220098764 A 20220712; MX 2022005783 A 20220712
DOCDB simple family (application)
FI 2019050821 W 20191115; AU 2019474270 A 20191115; BR 112022009315 A 20191115; CA 3160982 A 20191115; CN 202011155698 A 20201026; CN 202022408415 U 20201026; EP 19920627 A 20191115; KR 20227019197 A 20191115; MX 2022005783 A 20191115