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Differential Extraction of Rare-earth Elements in Quaternary Ammonium Compound-chelating Agent Systems.

Authors
Bauer-DJ; Lindstrom-RE
Source
NTIS: PB 200 705 :16 pages
Link
NIOSHTIC No.
10008757
Abstract
Solvent extraction separation of light group rare-earth elements in a quaternary ammonium compound-chelating agent system was demonstrated in single-stage studies. Typical separation factor values obtained were 93 for lanthanum-praseodymium, 5.4 For praseodymium-neodymium, and 11.6 For neodymium-samarium. These values are significantly higher than those obtained using organophosphate extractants. Further studies in a 20-stage countercurrent mixer-settler resulted in the production of 99 percent lanthanum (oxide basis) of 96-percent recovery. Subsequently, 88 percent of the neodymium with a purity of 92 percent was recovered in the raffinate.
Publication Date
19710101
Document Type
IH; Report of Investigation;
Fiscal Year
1971
NTIS Accession No.
PB-200705
NTIS Price
A03
Identifying No.
RI 7524
NIOSH Division
RERC;
Source Name
NTIS: PB 200 705
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