Title:
METHOD FOR REMOVING ALUMINUM AND METHOD FOR RECOVERING METALS
Document Type and Number:
WIPO Patent Application WO/2024/014521
Kind Code:
A1
Abstract:
Provided are a method for removing aluminum which can effectively remove aluminum, and a method for recovering metals. A method for removing aluminum includes: a leaching step of bringing a raw material, the raw material having battery powder, the battery powder being obtained from lithium ion battery waste and comprising at least aluminum and nickel and/or cobalt, into contact with an acidic leaching solution to leach the battery powder to obtain a leached solution containing at least aluminum ions and nickel ions and/or cobalt ions; and a neutralization step of using the leached solution as a metal-containing solution, increasing a pH of the metal-containing solution and separating a neutralized residue to obtain a neutralized solution, wherein a molar ratio of fluorine to aluminum (F/Al molar ratio) of the raw material is 1.3 or more, and wherein, in the neutralization step, the metal-containing solution contains calcium and fluorine, a molar ratio of calcium to aluminum ions (Ca/Al molar ratio) in the metal-containing solution is 0.2 or more, the aluminum ions in the metal-containing solution are precipitated and contained in the neutralized residue together with calcium and fluorine.
Inventors:
HIGUCHI NAOKI (JP)
SHIKADA KEI (JP)
SHIKADA KEI (JP)
Application Number:
PCT/JP2023/025955
Publication Date:
January 18, 2024
Filing Date:
July 13, 2023
Export Citation:
Assignee:
JX METALS CORP (JP)
International Classes:
C22B7/00; C22B3/00; C22B21/00; C22B26/12; H01M10/54
Foreign References:
| EP3950978A1 | 2022-02-09 | |||
| JP2018145473A | 2018-09-20 | |||
| JP2014156648A | 2014-08-28 | |||
| JP2019178395A | 2019-10-17 | |||
| CN111987381A | 2020-11-24 | |||
| CN113897490A | 2022-01-07 | |||
| JP2017166028A | 2017-09-21 | |||
| JP2014162982A | 2014-09-08 | |||
| JP2007122885A | 2007-05-17 | |||
| JP2014162982A | 2014-09-08 | |||
| JP2017166028A | 2017-09-21 |
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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