EP 1016152 A1 20000705 - LITHIUM RECOVERY AND PURIFICATION
Title (en)
LITHIUM RECOVERY AND PURIFICATION
Title (de)
LITHIUM-WIEDERGEWINNUNG UND -REINIGUNG
Title (fr)
RECUPERATION ET PURIFICATION DE LITHIUM
Publication
Application
Priority
- NZ 9800087 W 19980618
- NZ 32815097 A 19970623
- NZ 32830197 A 19970710
Abstract (en)
[origin: WO9859385A1] This invention relates to a method and apparatus for the recovery and/or purification of lithium, particularly from lithium battery waste material. The method involves an electrolytic process in which a lithium containing slurry is filtered and washed to separate insoluble materials from the soluble lithium components, the filtered soluble mixed lithium salt containing battery waste solution is provided as an anolyte in the anode compartment of an electrolytic cell, the anode compartment is separated from the cathode compartment with a cation exchange membrane having a porosity to selectively allow the passage of lithium ions and inhibit the passage of others, a current is passed through the electrolytic cell and substantially pure lithium hydroxide solution is withdrawn from the cathode compartment. The method may further include a nanofiltration process in which the substantially pure lithium hydroxide solution is passed against a nanofiltration membrane having a stability at a pH of at least 11, under pressure, and the permeate is collected, being a further purified lithium hydroxide solution. The nanofiltration process may be employed for the purification of other monovalent lithium salt solutions.
IPC 1-7
H01M 6/52; H01M 10/54; B01D 61/14; B01D 61/16; B01D 61/18; C25B 1/16; C01D 15/02
IPC 8 full level
B01D 61/02 (2006.01); B01D 61/44 (2006.01); B01D 61/58 (2006.01); B01D 69/00 (2006.01); C01D 15/02 (2006.01); C02F 1/46 (2006.01); C22B 7/00 (2006.01); C22B 26/12 (2006.01); C25B 1/16 (2006.01); C25B 1/26 (2006.01); H01M 6/52 (2006.01); H01M 10/54 (2006.01); H01M 6/16 (2006.01); H01M 10/05 (2010.01); H01M 10/40 (2006.01)
CPC (source: EP)
B01D 61/027 (2013.01); B01D 61/44 (2013.01); B01D 61/58 (2013.01); C01D 15/02 (2013.01); C25B 1/16 (2013.01); H01M 6/52 (2013.01); H01M 10/54 (2013.01); B01D 61/422 (2013.01); H01M 6/16 (2013.01); H01M 10/05 (2013.01); Y02E 60/10 (2013.01); Y02W 30/84 (2015.05)
Citation (search report)
See references of WO 9859385A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9859385 A1 19981230; AU 8247198 A 19990104; EP 1016152 A1 20000705; JP 2001508925 A 20010703
DOCDB simple family (application)
NZ 9800087 W 19980618; AU 8247198 A 19980618; EP 98932642 A 19980618; JP 50423599 A 19980618