METHOD FOR SEPARATING POSITIVE-POLE ACTIVE SUBSTANCE AND METHOD FOR RECOVERING VALUABLE METALS FROM LITHIUM ION BATTERY

Title:

METHOD FOR SEPARATING POSITIVE-POLE ACTIVE SUBSTANCE AND METHOD FOR RECOVERING VALUABLE METALS FROM LITHIUM ION BATTERY

Document Type and Number:

WIPO Patent Application WO/2012/081645

Kind Code:

A1

Abstract:

The purpose of the present invention is to improve the recovery rate of a positive-pole active substance and to prevent valuable metal recovery loss when the positive-pole active substance is separated from a lithium ion battery. By means of the present invention, a lithium ion battery is dismantled and the resulting battery scraps are stirred in a surfactant solution to separate a positive-pole active substance from a positive pole substrate. Moreover, preferably an alkali solution is added to the positive pole material contained in the battery scraps, the positive pole substrate to which the positive-pole active substance adheres is dissolved, a slurry containing the positive-pole active substance is obtained, a surfactant solution is added to this slurry, and the positive-pole active substance is dispersed in the slurry to thereby separate the positive-pole active substance and the alkali solution.

Inventors:

KUDO KEIJI (JP)
ISHIDA HITOSHI (JP)
ASANO SATOSHI (JP)
KAWAKAMI YUKIE (JP)

Application Number:

PCT/JP2011/078972

Publication Date:

June 21, 2012

Filing Date:

December 14, 2011

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)
KUDO KEIJI (JP)
ISHIDA HITOSHI (JP)
ASANO SATOSHI (JP)
KAWAKAMI YUKIE (JP)

International Classes:

C22B3/04; C22B7/00; C22B23/00; H01M10/54

Foreign References:

JP2004342524A	2004-12-02
JPH10162868A	1998-06-19
JPH0820825A	1996-01-23
JPH07207349A	1995-08-08
JPH10330855A	1998-12-15
JPH0822846A	1996-01-23
JP2003157913A	2003-05-30

Other References: