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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 10807879 B1

PDFFull Text
Date of Patent:
Oct. 20, 2020

Filed:

Mar. 15, 2017

Processing method for lithium ion battery scrap

Applicant:

Jx Nippon Mining & Metals Corporation, Tokyo, JP;

Inventors:

Junichi Ito, Tsuruga, JP;

Junichi Arakawa, Tsuruga, JP;

Takuya Yokota, Hitachi, JP;

Naoki Higuchi, Hitachi, JP;

Assignee:

JX NIPPON MINING & METALS CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Steven J Bos

Int. Cl.
CPC ...
C01G 45/00 (2006.01); C22B 3/00 (2006.01); C22B 3/26 (2006.01); C22B 3/44 (2006.01); C22B 3/30 (2006.01); C22B 3/38 (2006.01); B09B 3/00 (2006.01); C21B 15/00 (2006.01); C22B 26/12 (2006.01); C22B 7/00 (2006.01); H01M 10/54 (2006.01); C01G 51/00 (2006.01); C01G 51/04 (2006.01); C01G 53/00 (2006.01); C01G 53/04 (2006.01);
U.S. Cl.
CPC ...
C01G 45/003 (2013.01); B09B 3/0016 (2013.01); C01G 51/003 (2013.01); C01G 51/04 (2013.01); C01G 53/003 (2013.01); C01G 53/04 (2013.01); C21B 15/00 (2013.01); C22B 3/0005 (2013.01); C22B 3/0017 (2013.01); C22B 3/0043 (2013.01); C22B 3/44 (2013.01); C22B 7/007 (2013.01); C22B 23/043 (2013.01); C22B 23/0407 (2013.01); C22B 23/0461 (2013.01); C22B 26/12 (2013.01); H01M 10/54 (2013.01); Y02P 10/234 (2015.11); Y02P 10/236 (2015.11); Y02W 30/84 (2015.05);
Abstract

A method for processing lithium ion battery scrap according to this invention includes a leaching step of leaching lithium ion battery scrap to obtain a leached solution; an aluminum removal step of neutralizing the leached solution to a pH range of from 4.0 to 6.0, then performing solid-liquid separation and removing aluminum in the leached solution to obtain a first separated solution; and an iron removal step of adding an oxidizing agent to the first separated solution and adjusting the pH in a range of from 3.0 to 5.0, then performing solid-liquid separation and removing iron in the first separated solution to obtain a second separated solution.

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