LITHIUM RECOVERING METHOD

PROBLEM TO BE SOLVED: To inexpensively and easily separate and recover lithium from positive electrode active material of a spent lithium ion secondary battery. SOLUTION: In this lithium recovering method, when alkali used for deposit formation is separated from lithium contained in residual solutio...

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Bibliographische Detailangaben
Hauptverfasser:	KONUMA MASATAKA, TOMIOKA YOSHIKI, YABUKI MOTOO, HAYASHI MASARU, TEZUKA FUMINOBU
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT ELECTRICITY FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PRETREATMENT OF RAW MATERIALS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To inexpensively and easily separate and recover lithium from positive electrode active material of a spent lithium ion secondary battery. SOLUTION: In this lithium recovering method, when alkali used for deposit formation is separated from lithium contained in residual solution by using the residual solution containing alkali obtained after recovering transition metal from positive electrode active material of a spent lithium ion secondary battery, the residual solution is evaporated, dried and hardened, the dried substance is dissolved by alcohol, the solution obtained is then brought into contact with a positive ion exchange resin, and thereby, an alkali ion is separated from a lithium ion by absorbing the alkali ion in the solution by the positive ion exchange resin, in order to recover the separator lithium.