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Process for separation of the rare earths by solvent extraction. [using di(2-ethylhexyl) mono-thiophosphoric acid]

Patent ·
OSTI ID:5305461
;

Production rates for solvent extraction separation of the rare earths and yttrium from each other can be improved by the substitution of di(2-ethylhexyl) mono-thiophosphoric acid for di(2-ethylhexyl) phosphoric acid. The di(2-ethylhexyl) mono-thiophosphoric acid does not form an insoluble polymer at approximately 50 percent saturation as does the former extractant, permitting higher feed solution concentration and thus greater throughput. 5 claims, 1 figure.

Assignee:
Energy Research and Development Administration
Patent Number(s):
US 4016237
OSTI ID:
5305461
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ELEMENTS
ESTERS
EXTRACTION
METALS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC SOLVENTS
ORGANIC SULFUR COMPOUNDS
PHOSPHORIC ACID ESTERS
RARE EARTHS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS
TRANSITION ELEMENTS
YTTRIUM