METHOD OF RECOVERING VALUABLE SUBSTANCE FROM LITHIUM SECONDARY BATTERY, AND RECOVERY APPARATUS THEREFOR

Title:

METHOD OF RECOVERING VALUABLE SUBSTANCE FROM LITHIUM SECONDARY BATTERY, AND RECOVERY APPARATUS THEREFOR

Document Type and Number:

WIPO Patent Application WO/2007/088617

Kind Code:

A1

Abstract:

A method of recovering valuable substances, comprising the solvent detaching step (S3) of immersing fracture pieces of a lithium secondary battery in a solvent to thereby dissolve the resin binder of the electrode material and detach the electrode material containing valuable substances from the electrode constructing metal foil; the filtering step (S4) of filtering the resultant solvent suspension to thereby attain separation and recovery of the electrode material containing valuable substances and the carbon material; the heat treatment step (S5) of heating the recovered electrode material containing valuable substances and carbon material in an oxidative atmosphere to thereby attain combustion removal of the carbon material; and the reduction reaction step (S6) of immersing the obtained electrode material containing valuable substances in a molten salt of lithium chloride containing metallic lithium to thereby effect a reduction reaction.

Inventors:

KAKUTA TOSHIYA (JP)
YAMAZAKI SEIICHIRO (JP)

Application Number:

PCT/JP2006/301765

Publication Date:

August 09, 2007

Filing Date:

February 02, 2006

Export Citation:

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Assignee:

KAWASAKI PLANT SYSTEMS KK (JP)
KAKUTA TOSHIYA (JP)
YAMAZAKI SEIICHIRO (JP)

International Classes:

H01M10/54

Foreign References:

JP2005011698A	2005-01-13
JP2003206132A	2003-07-22
JPH10255862A	1998-09-25
JP2000348782A	2000-12-15
JP2003272720A	2003-09-26
JPH10287864A	1998-10-27
JPH10158751A	1998-06-16
JP2005011698A	2005-01-13
JP2001185241A	2001-07-06
JPH108150A	1998-01-13
JPH10241750A	1998-09-11
JP2003157913A	2003-05-30
JPH1197076A	1999-04-09
JP2003272720A	2003-09-26
JP2005042189A	2005-02-17

Other References: