Title:
PURIFICATION OF RARE EARTH ELEMENT SALT AQUEOUS SOLUTION BY LIQUID-LIQUID EXTRACTION
Document Type and Number:
Japanese Patent JPS61205618
Kind Code:
A
Abstract:
Aqueous nitric solutions of salts of at least one rare earth, and containing contaminating amounts of at least one alkaline earth cation, e.g., calcium, barium and/or radium, are conveniently purified by liquid/liquid extracting same with an organic phase which comprises a polyether extractant for said at least one alkaline earth cation, e.g., a crown ether, and whereby said at least one alkaline earth cation is selectively transferred into said organic phase.
Inventors:
ARAN RORAN
JIYAN RUI SABO
MISHIERU BIYURUGAARU
TEIERI DEROWA
JIYAN RUI SABO
MISHIERU BIYURUGAARU
TEIERI DEROWA
Application Number:
JP369686A
Publication Date:
September 11, 1986
Filing Date:
January 13, 1986
Export Citation:
Assignee:
RHONE POULENC SPEC CHIM
International Classes:
B01D61/40; C01F11/00; C22B59/00; C01F17/10; C01F17/17; C01F17/276; C22B3/00; C22B3/26; (IPC1-7): C01F17/00; C22B59/00
Domestic Patent References:
| JPS5339841A | 1978-04-12 | |||
| JPS536284A | 1978-01-20 |
Attorney, Agent or Firm:
Motohiro Kurauchi
Previous Patent: JPS61205617
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