Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Rare earth metal
Patent
1986-01-15
1988-02-23
Fisher, Richard V.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Rare earth metal
423157, 423DIG14, 210634, 210643, 210644, B01D 1104
Patent
active
047269383
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.
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Burgard Michel
Delloye Thierry
Rollat Alain
Sabot Jean-Louis
Fisher Richard V.
Peterson Jeffrey W.
Rhone-Poulenc Specialites Chimiques
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