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SOLVENT-EXTRACTION OF NEODYMIUM, EUROPIUM AND THULIUM BY DI-(2-ETHYLHEXYL)PHOSPHORIC ACID
Faculty
Science
Year:
1993
Type of Publication:
Article
Pages:
207-214
Authors:
ELKOT, AM
DOI:
10.1007/BF02134592
Journal:
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES AKADEMIAI KIADO
Volume:
170
Research Area:
Chemistry; Nuclear Science \& Technology
ISSN
ISI:A1993LA44800022
Keywords :
SOLVENT-EXTRACTION , NEODYMIUM, EUROPIUM , THULIUM , DI-(2-ETHYLHEXYL)PHOSPHORIC ACID
Abstract:
The extraction of Na3+, Eu3+ and Tm3+ by di-(2-ethylhexyl)phosphoric acid, HDEHP has been studied from various aqueous acidic solutions. The extraction of these elements is inversely proportional to the third power of the hydrogen ion concentration. Antagonistic effects were observed when the extraction was studied by mixtures of HDEHP and tributyl phosphate, TBP, or trioctylphosphine oxide, TOPO. The presence of water-miscible alcohols and acetone generally increases the extraction of these three elements from HCl solutions. Reaction mechanisms have been suggested and discussed in the light of the data obtained.
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