Title:
ALUMINIUM REMOVAL METHOD
Document Type and Number:
WIPO Patent Application WO/2023/157378
Kind Code:
A1
Abstract:
An aluminium removal method, comprising: a leaching step in which battery powder obtained from lithium-ion battery waste and containing at least one of aluminium, nickel and cobalt is leached with an acid to obtain a leached solution, which contains at least one of aluminium ions, nickel ions and cobalt ions; and a neutralisation step which consists in increasing the pH of the leached solution to remove aluminium ions, wherein, when aluminium ions are removed in the neutralisation step, an alkaline pH adjuster is added to the leached solution to increase the pH, and when the pH has reached 3.0 to 4.0, iron is added instead of the pH adjuster to further increase the pH.
Inventors:
HIGUCHI NAOKI (JP)
Application Number:
PCT/JP2022/039180
Publication Date:
August 24, 2023
Filing Date:
October 20, 2022
Export Citation:
Assignee:
JX METALS CORP (JP)
International Classes:
C22B7/00; B09B3/70; C22B3/06; C22B3/44; C22B3/46; C22B23/00; H01M10/54
Foreign References:
| JP2018040035A | 2018-03-15 | |||
| JP2013221178A | 2013-10-28 | |||
| JP2020522622A | 2020-07-30 | |||
| JP2014114470A | 2014-06-26 | |||
| JP2013076112A | 2013-04-25 | |||
| JP2017036478A | 2017-02-16 | |||
| JP2020180362A | 2020-11-05 | |||
| JP2016191119A | 2016-11-10 | |||
| JP2016186118A | 2016-10-27 |
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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