Title:
LI RECOVERY METHOD AND RECOVERY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2022/176712
Kind Code:
A1
Abstract:
A Li recovery method comprises: an acid leaching step for producing a leachate solution by the addition of acid to a battery slag that contains an Li fraction; a first addition step for adding a Ca fraction to the leachate solution to produce a first treatment material; a post-first-addition filtration step for filtering the first treatment material to separate the first treatment material into a first treatment filtrate and a first treatment residue; a second addition step for adding sodium carbonate to the first treatment filtrate to produce a second treatment material; a post-second-addition filtration step for filtering the second treatment material to separate the second treatment material into a Ca fraction-containing second treatment residue and a second treatment filtrate containing an Li fraction and an Na fraction; a heating step for heating the second treatment filtrate; a carbonation step for blowing carbon dioxide gas into the heated second treatment filtrate to produce a third treatment material; and a post-carbonation filtration step for filtering the third treatment material to separate the third treatment material into an Na fraction-containing third treatment filtrate and an Li fraction-containing third treatment residue.
Inventors:
KURAMOCHI KENTA (JP)
MIYAZAKI ATSUSHI (JP)
MURAOKA HIROKI (JP)
MIYAZAKI ATSUSHI (JP)
MURAOKA HIROKI (JP)
Application Number:
PCT/JP2022/004930
Publication Date:
August 25, 2022
Filing Date:
February 08, 2022
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP (JP)
International Classes:
C22B26/12; C22B3/06; C22B3/22; C22B3/44
Domestic Patent References:
| WO2020203888A1 | 2020-10-08 |
Foreign References:
| JP2021147706A | 2021-09-27 | |||
| JP2021023221A | 2021-02-22 | |||
| JP2019160429A | 2019-09-19 | |||
| JP2019011518A | 2019-01-24 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
Download PDF:
Previous Patent: AIR PURIFIER
Next Patent: LIQUID CRYSTAL ALIGNMENT AGENT, LIQUID CRYSTAL ALIGNMENT FILM, AND POLYMER-DISPERSED LIQUID CRYSTAL ...
Next Patent: LIQUID CRYSTAL ALIGNMENT AGENT, LIQUID CRYSTAL ALIGNMENT FILM, AND POLYMER-DISPERSED LIQUID CRYSTAL ...