PROCESS FOR SEPARATING YTTRIUM FROM THE RARE EARTHS BY SOLVENT EXTRACTION
Patent
·
OSTI ID:4693281
A process of isolating yttrium from other rare earths present together with it in aqueous solutions is presented. Yttrium and rare earths heavier than yttrium are first extracted with dialkyl phosphoric acid, after adjustment of the acidity to 2 N, and then back-extracted with 5-6 N mineral acid to form a strip solution. Thiocyanate is added to the strip solution and the rare earths heavier than yttrium are then selectively extracted with trialkyl phosphate, dialkyl phosphoric acid, alkyl phosphonate, or dialkyl aryl phosphonate, leaving the yttrium in the aqueous solution. (AEC)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-17-040951
- Assignee:
- U.S. Atomic Energy Commission
- Patent Number(s):
- US 3110556
- OSTI ID:
- 4693281
- Country of Publication:
- United States
- Language:
- English
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