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1. WO2012065361 - METHOD AND DEVICE FOR SEPARATING LITHIUM FROM MAGNESIUM AND ENRICHING LITHIUM IN SALT LAKE BRINE

Publication Number WO/2012/065361
Publication Date 24.05.2012
International Application No. PCT/CN2011/001896
International Filing Date 11.11.2011
IPC
C22B 26/12 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
26Obtaining alkali, alkaline earth metals or magnesium
10Obtaining alkali metals
12Obtaining lithium
C22B 3/24 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3Extraction of metal compounds from ores or concentrates by wet processes
20Treatment or purification of solutions, e.g. obtained by leaching
22by physical processes, e.g. by filtration, by magnetic means
24by adsorption on solid substances, e.g. by extraction with solid resins
B01J 20/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
20Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
02comprising inorganic material
CPC
B01D 61/44
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
61Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis, ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
42Electrodialysis; Electro-osmosis ; Electro-ultrafiltration
44Ion-selective electrodialysis
B01J 47/12
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
47Ion-exchange processes in general; Apparatus therefor
12characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes
C22B 26/12
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
26Obtaining alkali, alkaline earth metals or magnesium
10Obtaining alkali metals
12Obtaining lithium
C25C 1/22
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
CPROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
1Electrolytic production, recovery or refining of metals by electrolysis of solutions
22of metals not provided for in groups C25C1/02 - C25C1/20
Applicants
  • 中南大学 CENTRAL SOUTH UNIVERSITY [CN]/[CN] (AllExceptUS)
  • 赵中伟 ZHAO, Zhongwei [CN]/[CN] (UsOnly)
  • 刘旭恒 LIU, Xuheng [CN]/[CN] (UsOnly)
Inventors
  • 赵中伟 ZHAO, Zhongwei
  • 刘旭恒 LIU, Xuheng
Agents
  • 长沙市融智专利事务所 CHANGSHA RONGZHI PATENT AGENCY
Priority Data
201010552141.619.11.2010CN
201010552143.519.11.2010CN
201010555927.319.11.2010CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) METHOD AND DEVICE FOR SEPARATING LITHIUM FROM MAGNESIUM AND ENRICHING LITHIUM IN SALT LAKE BRINE
(FR) PROCÉDÉ ET DISPOSITIF POUR SÉPARER LE LITHIUM DU MAGNÉSIUM ET ENRICHIR EN LITHIUM DE LA SAUMURE DE LAC SALÉ
(ZH) 一种盐湖卤水镁锂分离及富集锂的方法和装置
Abstract
(EN)
Provided are a method and a supporting device for separating lithium from magnesium and enriching lithium in salt lake brine. The method comprises the following steps: separating an electrodialysis device into a lithium salt chamber (5) and a brine chamber (4) by an anion exchange membrane (l), filling the brine chamber (4) with salt lake brine, feeding a supporting electrolyte solution free of MgZ+ into the lithium salt chamber (5); placing a conductive base material coated with an ion sieve as a cathode (2) in the brine chamber (4); placing a conductive base material coated with a lithium-intercalated ion sieve as an anode (3) in the lithium salt chamber (5); under the drive of external electric potential, enabling Li+ in the brine in the brine chamber (4) to be intercalated into the ion sieve, to form a lithium-intercalated ion sieve, and enabling the lithium intercalated ion sieve in the lithium salt chamber (5) to be restored to an ion sieve after releasing Li+ to the conductive solution; after lithium intercalation, discharging the liquid in the brine chamber (4), and adding salt lake brine again, exchanging the electrodes in the two chamber, and repeating the cycle operation, thereby achieving high-efficiency separation of lithium from other ions, and obtaining a lithium-enriched solution. The method has the advantages of short process flow, simple operation, low production cost, continuous operation, and easy industrial application.
(FR)
L'invention concerne un procédé et un dispositif associé pour séparer le lithium du magnésium et enrichir en lithium de la saumure de lac salé. Le procédé comprend les étapes suivantes : séparer un dispositif d'électrodialyse dans une chambre de sel de lithium (5) et une chambre de saumure (4) par une membrane échangeuse d'anions (1), remplir la chambre de saumure (4) avec de la saumure de lac salé, et introduire une solution d'électrolyte de support exempte de Mg2+ dans la chambre de sel de lithium (5); placer un matériau de base conducteur recouvert d'un tamis ionique comme cathode (2) dans la chambre de saumure (4); placer un matériau de base conducteur recouvert d'un tamis ionique à lithium intercalé (3) dans la chambre de sel de lithium (5); appliquer un potentiel électrique externe pour permettre au Li+ de la saumure dans la chambre de saumure (4) de s'intercaler dans le tamis ionique pour former un tamis ionique à lithium intercalé, et pour permettre au tamis ionique à lithium intercalé dans la chambre de sel de lithium (5) d'être restauré en tamis ionique après libération du Li+ dans la solution conductrice; une fois le lithium intercalé, évacuer le liquide de la chambre de saumure (4), la remplir à nouveau de saumure de lac salé, changer les électrodes dans les deux chambres, et répéter le cycle pour effectuer ainsi une séparation très efficace du lithium des autres ions et obtenir une solution enrichie en lithium. Parmi les avantages du procédé, on citera un flux de production court, une opération simple, des coûts de production limités, un fonctionnement continu, et une application industrielle facile.
Also published as
DE1120111038399
Latest bibliographic data on file with the International Bureau