SEPARATION OF YTTRIUM AND THE RARE EARTHS BY LIQUID-LIQUID EXTRACTION. Progress Report No. 167. Period covered: January 16, 1958 to June 6, 1958

Technical Report · Sun Jun 01 04:00:00 EDT 1958

OSTI ID:4116771

Lockwood, D A

The success of the monododecyl phosphoric acid, Dowsol-12 mixture, as an extracting agent for separating yttrium and the rare earths from each other has led to the design of a 70-stage pilot plant liquid-liquid extraction system. A 49-stage unit will be used to separate yttrium and the heavy rare earths from the lights, a 13-stage acid back estractor will separate yttrium from the heavies and an 8stage acid back extractor will strip the remaining heavies from the organic phase. This report includes information obtained from operation of a 13-stage and 21-stage pilot plant extractor unit and a number of preliminary laboratory experiments. The data reported show that in the 21stage extractor 85% + of the total yttrium is upgraded from 63% to 85 to 93%, while dysprosium and gadolinium are reduced to 1400 and 400 ppm, respectively. recent laboratory experiments indicate that this concentrate can be upgraded by acid back extraction to metallurgical grade yttrium. (auth)

• Research Organization: Michigan Chemical Corp., St. Louis, Mich.
• NSA Number: NSA-15-004056
• OSTI ID: 4116771
• Report Number(s): TID-11083
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALKYL RADICALS
CHEMISTRY
DOWSOL
DYSPROSIUM
EXTRACTION COLUMNS
GADOLINIUM
LABORATORY EQUIPMENT
MDPA
METALLURGY
MIXING
MIXTURES
ORGANIC COMPOUNDS
PHOSPHORIC ACID
PLANNING
RARE EARTHS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS
USES
YTTRIUM