SEPARATION OF EUROPIUM FROM OTHER LANTHANIDE RAE EARTHS BY SOLVENT EXTRACTION

Patent · Tue Feb 12 00:00:00 EST 1963

OSTI ID:4707372

Peppard, D F; Horwitz, E P; Mason, G W

This patent deals with a process of separating europium from other lanthanides present in aqueous hydrochloric or sulfuric acid solutions. The europium is selectively reduced to the divalent state with a divalent chromium salt formed in situ from chromium(III) salt plus zinc amalgam. The other trivalent lanthanides are then extracted away from the divalent europium with a nitrogen-flushed phosphoric acid ester or a phosphonic acid ester. (AEC)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-012386
• Assignee: U.S. Atomic Energy Commission
• Patent Number(s): US 3077378
• OSTI ID: 4707372
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-63
• Country of Publication: United States
• Language: English

Related Subjects

CHEMISTRY
CHROMIUM COMPOUNDS
ESTERS
EUROPIUM
HYDROCHLORIC ACID
MERCURY ALLOYS
PHOSPHORIC ACID
RARE EARTHS
REDUCTION
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SULFURIC ACID
WATER
ZINC ALLOYS