Title:
METHOD FOR RECOVERING LITHIUM FROM WASTE LITHIUM ION BATTERY
Document Type and Number:
Japanese Patent JP2023103940
Kind Code:
A
Abstract:
To provide a method for recovering lithium from a waste lithium ion battery that enables lithium to be recovered with a high recovery rate.SOLUTION: A method for recovering lithium from a waste lithium ion battery includes: a dissolution step for dissolving active material powder, obtained by pretreating a waste lithium ion battery, with mineral acid; an alkali hydroxide addition step for adding sodium hydroxide or the like to a solution obtained in the dissolution step; an extraction step for extracting, from a solution obtained in the alkali hydroxide addition step, valuable metals with an organic solvent by solvent extraction: a nickel removal step for mixing a first alkali mixed salt aqueous solution obtained in the extraction step with alkali to remove nickel, thereby obtaining a second alkali mixed salt aqueous solution; a separation step for separating a lithium salt and a salt of sodium or the like respectively from the second alkali mixed salt aqueous solution; and a lithium recovery step for recovering lithium from a first lithium salt aqueous solution obtained in the separation step.SELECTED DRAWING: None
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Inventors:
YAMADA KEITA
SAKUMA YUKIO
HIRAOKA TARO
SAKUMA YUKIO
HIRAOKA TARO
Application Number:
JP2022086691A
Publication Date:
July 27, 2023
Filing Date:
May 27, 2022
Export Citation:
Assignee:
ASAKA RIKEN KK
International Classes:
C22B26/12; C22B3/06; C22B3/08; C22B3/10; C22B3/26; C22B3/44; C22B7/00; C22B21/00; C22B23/00; C22B47/00; C25B1/04; C25B1/46; C25B9/00; C25B9/65; H01M10/54
Attorney, Agent or Firm:
Patent Attorney Corporation Sosei International Patent Office