Title:
METHOD FOR RECOVERING LITHIUM FROM WASTE LITHIUM ION BATTERY
Document Type and Number:
Japanese Patent JP2023103933
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 and also enables salts generated during the recovery process to be reused in the process as mineral acid and alkali.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 alkali to a solution obtained in the dissolution step; a solid-liquid separation step for performing solid-liquid separation into insoluble matter and a solution A, following the alkali hydroxide addition step; an extraction step for sequentially extracting cobalt, nickel and manganese in the solution A; a separation step for separating a lithium salt or the like from an alkali mixed salt aqueous solution obtained in the extraction step; and a lithium recovery step for recovering lithium from a lithium salt aqueous solution obtained in the separation step.SELECTED DRAWING: None
Inventors:
YAMADA KEITA
SAKUMA YUKIO
HIRAOKA TARO
SAKUMA YUKIO
HIRAOKA TARO
Application Number:
JP2022086684A
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; C22B3/22; C22B3/28; C22B3/30; C22B3/38; C22B3/44; C22B7/00; C25B1/04; C25B1/46; C25B9/00; C25B9/65; H01M10/54
Attorney, Agent or Firm:
Patent Attorney Corporation Sosei International Patent Office