Title: SEPARATION OF EUROPIUM FROM OTHER LANTHANIDE RAE EARTHS BY SOLVENT EXTRACTION

Abstract

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)

Inventors:

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

Issue Date:

1963-02-12

OSTI Identifier:

4707372

Patent Number(s):

3077378

Assignee:

U.S. Atomic Energy Commission

Patent Classifications (CPCs):

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS

C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS

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C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS

C01F17/00 - Compounds of rare earth metals

C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS

C22B59/00 - Obtaining rare earth metals

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D11/0492 - {Applications, solvents used}

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS

C01F17/17 - involving a liquid-liquid extraction
C01F17/10 - Preparation or treatment, e.g. separation or purification

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NSA Number:

NSA-17-012386

Resource Type:

Patent

Resource Relation:

Other Information: Orig. Receipt Date: 31-DEC-63

Country of Publication:

United States

Language:

English

Subject:

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