YTTRIUM BEHAVIOR IN RARE EARTH-AMINE EXTRACTION SYSTEMS AND EFFECT OF SEQUESTRANTS
Solvent extraction techniques were used to determine the extraction sequence of Y and the rare earth elements in an amine solvent extraction system. Single-stage extraction with Primene 81-R resulted in separation factors of 3.8 between Y and Dy and 25 between Y and Ce. Yttrium was concentrated in the aqueous phase. EDTA and DTPA, as aqueous phase counterextractants, enhance separation factors in amine-- rare earth sulfate systems. Yttrium separation from heavy rare earth elements exhibits marked sensitivity to the position of Y in the selectivity scale of the rare earth elements with the sequestrants. Yttrium-- Yb separation is more effective with EDTA, whereas Y-- Dy separation is more effectively increased with DTPA. (auth)
- Research Organization:
- Bureau of Mines. Reno Metallurgy Research Center, Nev.
- NSA Number:
- NSA-17-023430
- OSTI ID:
- 4690351
- Report Number(s):
- BM-RI-6242
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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