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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11961980 B1

PDFFull Text
Date of Patent:
Apr. 16, 2024

Filed:

Mar. 29, 2018

Lithium ion battery scrap treatment method

Applicant:

Jx Metals Corporation, Tokyo, JP;

Inventors:

Junichi Arakawa, Tsuruga, JP;

Yasufumi Haga, Tsuruga, JP;

Junichi Ito, Tokyo, JP;

Assignee:

JX METALS CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Ula C Ruddock

Assistant Examiner:

Mary Grace Byram

Int. Cl.
CPC ...
H01M 10/54 (2006.01); B09B 3/00 (2022.01); B09B 5/00 (2006.01); C01G 45/02 (2006.01); C01G 49/02 (2006.01); C22B 1/02 (2006.01); C22B 3/00 (2006.01); C22B 3/06 (2006.01); C22B 3/44 (2006.01); C22B 7/00 (2006.01); C22B 15/00 (2006.01); C22B 21/00 (2006.01); C22B 23/00 (2006.01); C22B 26/12 (2006.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 10/54 (2013.01); B09B 3/00 (2013.01); B09B 5/00 (2013.01); C01G 45/02 (2013.01); C01G 49/02 (2013.01); C22B 1/02 (2013.01); C22B 3/06 (2013.01); C22B 3/44 (2013.01); C22B 7/00 (2013.01); C22B 7/007 (2013.01); C22B 15/00 (2013.01); C22B 15/0086 (2013.01); C22B 21/00 (2013.01); C22B 23/00 (2013.01); C22B 23/0415 (2013.01); C22B 26/12 (2013.01); H01M 10/0525 (2013.01); Y02P 10/20 (2015.11); Y02W 30/84 (2015.05);
Abstract

The present invention relates to a method for treating lithium ion battery scrap containing Li, Ni, Co, Mn, Al, Cu and Fe, the method comprising carrying out a calcination step, a crushing step and a sieving step in this order, and after the steps, the method comprising: a leaching step of leaching the lithium ion battery scrap by adding it to an acidic solution to leave at least a part of Cu as a solid; a Fe/Al removal step comprising allowing a leached solution obtained in the leaching step to pass through a Fe removal process for separating and removing Fe by addition of an oxidizing agent and an Al removal process for separating and removing a part of Al by neutralization in any order; an Al/Mn extraction step of extracting and removing a residue of Al and Mn from a separated solution obtained in the Fe/Al removal step by solvent extraction; a Co recovery step of extracting and back-extracting Co from a first extracted solution obtained in the Al/Mn extraction step by solvent extraction and recovering the Co by electrolytic winning; a Ni recovery step of extracting and back-extracting, by solvent extraction, a part of Ni from a second extracted solution obtained by the solvent extraction in the Co recovery step and recovering the Ni by electrolytic winning; a Li concentration step of extracting and back-extracting, by solvent extraction, a residue of Ni and Li from a third extracted solution obtained by the solvent extraction in the Ni recovery step and repeating the operations of the extracting and the back-extracting to concentrate Li; and a Li recovery step of carbonating Li in a Li concentrated solution obtained in the Li concentration step to recover the Li as lithium carbonate.

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