THE REMOVAL OF LANTHANUM OXIDE FROM A YTTRIUM OXIDE CONCENTRATE BY MEANS OF LIQUID-LIQUID EXTRACTION. Report 256. Period covered: February 10, 1959 to April 6, 1959

Technical Report · Mon Jun 29 04:00:00 EDT 1959

OSTI ID:4113611

McCowen, L D

The investigation of an aqueous scrub solution as an extracting agent for separating lanthanum from the Mallinckrodt rare-earth feed by liquid-liquid extraction has been successful with a sulfuric acid solution adjusted to a pH of 2.5. The lanthamum oxide was extracted with the aqueous acid solution, and the yttrium oxide and heavy rare earths were complexed into the organic solution consisting of monododecylphosphoric acid, iso-decanol, and kerosene. This report includes information obtained from the operation of an 8-stage and a 21-stage continuous countercurrent mixer-settler unit for the removal of lanthanum oxide from a yttrium oxide concentrate. Later this concentrate was fed to the continuous 49-stage primary contactor and 21stage acid back extractor. The data reported show that in the 49-stage extractor, 99% of the total yttrium was upgraded from 68 to 91% before equilibrium was reached. (auth)

• Research Organization: Michigan Chemical Corp., St. Louis, Mich.
• NSA Number: NSA-15-004062
• OSTI ID: 4113611
• Report Number(s): TID-11096
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALCOHOLS
ALKYL RADICALS
CHEMISTRY
COMPLEXES
COUNTER CURRENT
DECANOL
EXTRACTION COLUMNS
KEROSENE
LABORATORY EQUIPMENT
LANTHANUM OXIDES
MDPA
MIXER-SETTLERS
MIXING
ORGANIC COMPOUNDS
PHOSPHORIC ACID
RARE EARTHS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SOLVENTS
SULFURIC ACID
WATER
YTTRIUM OXIDES