RI 6396 Naphthenic Acid Solvent Extraction of Rare-Earth Sulfates
- Organization:
- The National Institute for Occupational Safety and Health (NIOSH)
- Pages:
- 26
- File Size:
- 2497 KB
- Publication Date:
- Jan 1, 1964
Abstract
Studies were conducted to assess the potential of naphthenic acid as a
fractional extractant for rare- earth mixtures and yttrium in sulfate solution .
Naphthenic acid was an effective extractant , and separation factors were
favorable in the presence of aqueous phase chelating agents . Addition of EDTA
to the naphthenic acid extraction system resulted in average separation factors
of 2.2 between adjacent yttrium- group elements , whereas DTPA resulted in
average separation factors of 3.5 between adjacent cerium- group elements .
EDTA was of value in separating yttrium from the rare- earth elements . Thorium
and uranium were preferentially extracted over the trivalent rare- earth elements
by naphthenic acid .
Citation
APA: (1964) RI 6396 Naphthenic Acid Solvent Extraction of Rare-Earth Sulfates
MLA: RI 6396 Naphthenic Acid Solvent Extraction of Rare-Earth Sulfates. The National Institute for Occupational Safety and Health (NIOSH), 1964.