Title:
METHOD FOR RECOVERING RARE EARTH ELEMENT
Document Type and Number:
WIPO Patent Application WO/2013/073376
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method for recovering a rare earth element, which is capable of efficiently recovering a rare earth element with high yield without using an expensive chemical, solvent or the like. In the method of the present invention, a water-soluble salt other than sulfate ions is made to be coexistent with an aqueous solution that contains a rare earth element, and then an alkali metal sulfate salt is added to the aqueous solution, thereby producing a precipitate of a double sulfate of the rare earth element.
Inventors:
MAEBA KAZUNARI (JP)
KAWAKAMI YUKIE (JP)
KUDO KEIJI (JP)
TAKANO MASATOSHI (JP)
ISHIDA HITOSHI (JP)
ASANO SATOSHI (JP)
TANAKA MASAHIRO (JP)
KAWAKAMI YUKIE (JP)
KUDO KEIJI (JP)
TAKANO MASATOSHI (JP)
ISHIDA HITOSHI (JP)
ASANO SATOSHI (JP)
TANAKA MASAHIRO (JP)
Application Number:
PCT/JP2012/078288
Publication Date:
May 23, 2013
Filing Date:
November 01, 2012
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
MAEBA KAZUNARI (JP)
KAWAKAMI YUKIE (JP)
KUDO KEIJI (JP)
TAKANO MASATOSHI (JP)
ISHIDA HITOSHI (JP)
ASANO SATOSHI (JP)
TANAKA MASAHIRO (JP)
MAEBA KAZUNARI (JP)
KAWAKAMI YUKIE (JP)
KUDO KEIJI (JP)
TAKANO MASATOSHI (JP)
ISHIDA HITOSHI (JP)
ASANO SATOSHI (JP)
TANAKA MASAHIRO (JP)
International Classes:
C22B59/00; C22B3/44; C22B7/00
Foreign References:
JPS61533A | 1986-01-06 | |||
JP2010174366A | 2010-08-12 | |||
JPS5489904A | 1979-07-17 | |||
EP2444507A1 | 2012-04-25 | |||
JPH0726336A | 1995-01-27 | |||
JPH09217133A | 1997-08-19 | |||
JPH0982371A | 1997-03-28 |
Other References:
See also references of EP 2781609A4
Attorney, Agent or Firm:
KOIKE, Akira et al. (JP)
Akira Koike (JP)
Akira Koike (JP)
Download PDF:
Claims: