METHOD OF TREATING WASTE BATTERY

WIPO Patent Application WO/2024/034327

A1

Provided is a treatment method for obtaining a solution, that contains nickel and/or cobalt, from a waste battery.　The invention comprises executing, in the stated order: 1) a pre-treatment step for detoxifying a waste battery and crushing same to obtain a crushed product; 2) an alkaline leaching step for adding an alkali to the crushed product to obtain an alkaline leachate including Li/Al/F/P as well as an alkaline leaching residue containing Ni and/or Co; 3) a reduction-leaching step for bringing the alkaline leaching residue into contact with an acid and a reducing agent to obtain a reduced leachate in which the Ni and/or Co have been reduced and leached into an acid solution; 4) a sulfurization step for adding a sulfurizing agent to the reduced leachate to obtain a sulfurized solution from which Cu has been removed by sulfide; 5) an oxidation-neutralization step for adding an oxidizing agent and a neutralizing agent to the sulfurized solution to remove the Fe/P/Al by precipitation and obtain an oxidized-neutralized solution; and 6) an ion exchange step for bringing the oxidized-neutralized solution into contact with an ion exchange resin to separate out F by adsorption onto the ion exchange resin and obtain an ion-exchanged solution containing Ni and/or Co.

MATSUOKA ITSUMI (JP)
TAKENOUCHI HIROSHI (JP)
MIZUNO SHIORI (JP)
SHOUJI HIROFUMI (JP)
WATANABE HIROTO (JP)
ASANO SATOSHI (JP)

PCT/JP2023/026011

February 15, 2024

July 14, 2023

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SUMITOMO METAL MINING CO (JP)

C22B23/00; C22B1/00; C22B1/02; C22B7/00; H01M10/54

JP2010277868A	2010-12-09
JP2021161496A	2021-10-11
JP2021147706A	2021-09-27
JP2017036489A	2017-02-16
CN102163760A	2011-08-24
JPH11293357A	1999-10-26

YAMAUCHI PATENT ATTORNEYS (JP)

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