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Patent Searching and Data


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)
Application Number:
PCT/JP2012/078288
Publication Date:
May 23, 2013
Filing Date:
November 01, 2012
Export Citation:
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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)
International Classes:
C22B59/00; C22B3/44; C22B7/00
Foreign References:
JPS61533A1986-01-06
JP2010174366A2010-08-12
JPS5489904A1979-07-17
EP2444507A12012-04-25
JPH0726336A1995-01-27
JPH09217133A1997-08-19
JPH0982371A1997-03-28
Other References:
See also references of EP 2781609A4
Attorney, Agent or Firm:
KOIKE, Akira et al. (JP)
Akira Koike (JP)
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Claims: