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EVALUATION OF THE YORK-SCHEIBEL LIQUID-LIQUID CONTACTOR FOR THE PREPARATION OF A YTTRIUM CONCENTRATE FOR ION EXCHANGE COLUMN FEED. Report No. 195. Period covered: February 26, 1958 to April16, 1958

Technical Report ·
OSTI ID:4113640
A maximum separation factor of 40 between yttrium and dysprosium was obtained in a york-Scheibel liquid-liquid contactor containing eleven physical stages using the following solutions and conditions of operation. The organic extractant composition was 2: 2: 1 kerosene: Lorol-22(Ndecanol) : 25 to 30% monododecyl phosphoric acid in kerosene. The aqueous scrub solution contained 20 g/liter of hydroxyethylethylenediaminetriacetic acid, 24 g/liter of acetic acid, and the pH was adjusted to 4.0 with 28% ammonia. The feed solution contained 50 g/liter of rare-earth oxides dissolved in acetic acid. The feed solution pH was 4.0. The ilow rates of the organic extractant, aqueous scrub, and feed solutions were 14.8 ml/min 8.8 ml/min, and 1.5 ml/min, respectively. The total throughput was 25.1 ml/min. An agitator speed of 700 rpm was used. This separation factor of 40 does not compare favorably with the separation factors (178 to 346) obtained in the 9-stage discontinuous mixer-settler liquid-liquid contactor or the separation factors (70 to 155) that were obtained in the 13stage continuous mixer-settler liquid-liquid contactor. (auth)
Research Organization:
Michigan Chemical Corp., St. Louis, Mich.
NSA Number:
NSA-15-004059
OSTI ID:
4113640
Report Number(s):
TID-11088
Country of Publication:
Country unknown/Code not available
Language:
English