Title:
METHOD FOR RECYCLING LITHIUM-ION BATTERIES AND DEVICE THEREFOR
Document Type and Number:
WIPO Patent Application WO/2014/042136
Kind Code:
A1
Abstract:
Provided is a method that uses a minimal amount of acid or alkali, involves a simple process, is inexpensive to operate, and can separate out and recover lithium, cobalt, or the like with high yield. After vacuum-baking, pulverization, and sifting, water is used to selectively leach out lithium. To separate out said lithium from a minute amount of eluted iron or aluminum, after the aforementioned use of water to leach out the lithium, solvent extraction is performed while a complex-forming substance is added. Preferably, the oil phase obtained via said solvent extraction is subjected to, for example, a stripping-crystallization process using a solution containing a high concentration of a lithium compound, under conditions under which crystallization of said lithium compound progresses simultaneously. Also, an acid is used to selectively leach out cobalt from the residue left after the abovementioned use of water to leach out the lithium.
Inventors:
SAEKI TOMONORI (JP)
SHIBATA JUNJI (JP)
TANAKA SATOSHI (JP)
SHIBATA JUNJI (JP)
TANAKA SATOSHI (JP)
Application Number:
PCT/JP2013/074327
Publication Date:
March 20, 2014
Filing Date:
September 10, 2013
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
C22B7/00; B09B3/00; C02F1/62; C22B1/02; C22B3/20; C22B3/44; C22B23/00; C22B26/12
Foreign References:
| JP2011094228A | 2011-05-12 | |||
| JP2012229481A | 2012-11-22 | |||
| JP2006004884A | 2006-01-05 | |||
| JP2005022925A | 2005-01-27 | |||
| JP2001115218A | 2001-04-24 | |||
| JP2012074247A | 2012-04-12 |
Other References:
SATOSHI TANAKA ET AL.: "Masking o Mochiita Yobai Chushutsu ni yoru Li to Sen'i Kinzoku no Chushutsu Bunri", ABSTRACTS OF ANNUAL MEETING OF THE SOCIETY OF CHEMICAL ENGINEERS, vol. 77TH, 15 February 2012 (2012-02-15), JAPAN, pages 216
HIROYUKI MUKUDA ET AL.: "Lithium-ion Denchi no Recycle Process eno Shoseki Hakuriho no Tekiyo", SHIGEN SOZAI, vol. 2013, 2013, pages 499 - 500
HIROYUKI MUKUDA ET AL.: "Lithium-ion Denchi no Recycle Process eno Shoseki Hakuriho no Tekiyo", SHIGEN SOZAI, vol. 2013, 2013, pages 499 - 500
Attorney, Agent or Firm:
POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)
Polaire Intellectual Property Corporation (JP)
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