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Title:
METHOD FOR PRODUCING METAL MIXTURE SOLUTION AND METHOD FOR PRODUCING MIXED METAL SALT
Document Type and Number:
WIPO Patent Application WO/2021/215520
Kind Code:
A1
Abstract:
A method for producing a metal mixture solution which contains manganese ions, and cobalt ions and/or nickel ions, said method comprising: an Al removal step wherein aluminum ions are removed from an acidic solution, which is obtained by subjecting a battery powder of a lithium ion battery waste to a leaching step, and which contains at least manganese ions, aluminum ions, and cobalt ions and/or nickel ions, by extracting the aluminum ions into a solvent, while having at least some of the manganese ions in the acidic solution remain in the aqueous phase; and a metal extraction step wherein the equilibrium pH of the extraction residue solution obtained in the Al removal step is adjusted to a value within the range of from 6.5 to 7.5 with use of a solvent that contains a carboxylic acid-based extractant, and after extracting the manganese ions and the cobalt ions and/or the nickel ions in the extraction residue solution into the solvent, the manganese ions and the cobalt ions and/or the nickel ions are back-extracted from the solvent.

Inventors:
ARAKAWA JUNICHI (JP)
TAJIRI KAZUNORI (JP)
Application Number:
PCT/JP2021/016380
Publication Date:
October 28, 2021
Filing Date:
April 22, 2021
Export Citation:
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Assignee:
JX NIPPON MINING & METALS CORP (JP)
International Classes:
B01D9/02; B01D11/04; B09B3/00; B09B5/00; C22B3/26; C22B3/32; C22B3/44; C22B7/00; C22B23/00; C22B47/00; H01M10/54
Domestic Patent References:
WO2016159002A12016-10-06
WO2005073415A12005-08-11
Foreign References:
JP2016186113A2016-10-27
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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