Title:
リチウムイオン電池の再資源化方法、およびその装置
Document Type and Number:
Japanese Patent JP5898021
Kind Code:
B2
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:
Tomonori Saeki
Junji Shibata
Satoshi Tanaka
Junji Shibata
Satoshi Tanaka
Application Number:
JP2012199564A
Publication Date:
April 06, 2016
Filing Date:
September 11, 2012
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
C22B7/00; B09B3/00; C02F1/62; C22B3/26; C22B3/44; C22B23/00; C22B26/12; H01M10/54
Domestic Patent References:
| JP2011094228A | ||||
| JP2006004884A | ||||
| JP2005022925A | ||||
| JP2001115218A | ||||
| JP2012074247A | ||||
| JP2012229481A |
Other References:
田中智史 他3名,マスキングを用いた溶媒抽出によるLiと遷移金属の抽出分離,化学工学会年会研究発表講演要旨集,日本,公益社団法人 化学工学会,2012年 2月15日,Vol.77th,ROMBUNNO.P216
Attorney, Agent or Firm:
Aoritsu patent business corporation
Polaire Patent Business Corporation
Polaire Patent Business Corporation