Extraction of some lanthanides by 12-crown-4 and 15-crown-5 from perchlorate media as ion pairs
Creators
- 1. Atomic Energy Authority, Cairo (Egypt). Hot Lab. Centre
Description
The extraction of the trivalent lanthanides Eu, Tm and Yb(Ln) by crown ethers (CE) 12-crown-4 (12C4) and 15-crown-5 (15C5) in chloroform from perchlorate aqueous media of constant ionic strength is investigated. The effect of [H+], [CE] and [ClO4-] on the respective distribution ratio is elucidated. Slope analysis of the results indicated that the extracted species were of the type Ln(OH)2+ x ClO4-(CE)2. The extraction constants obtained are in the sequence 15C5 > 12C4 for the CE's and Eu < Tm < Yb for the elements investigated. Based on the separation factors elucidated, Tm(III) and Yb(III) are separated from Eu(III) with high radiochemical purity; > 99.5% by three (or four) successive extraction and strippings. (author) 16 refs.; 3 figs.; 1 tab
Additional details
Publishing Information
- Journal Title
- Journal of Radioanalytical and Nuclear Chemistry
- Journal Volume
- 125
- Journal Issue
- 2
- Series
- J. Radioanal. Nucl. Chem. ;Articles.
- Journal Page Range
- 373-379
- ISSN
- 0236-5731
- CODEN
- JRNCD
INIS
- Country of Publication
- Hungary
- Country of Input or Organization
- Hungary
- INIS RN
- 20051266
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- AQUEOUS SOLUTIONS; CHLOROFORM; DISTRIBUTION FUNCTIONS; EFFICIENCY; IMPURITIES; ION PAIRS; PH VALUE; POLYETHYLENE GLYCOLS; RARE EARTH COMPLEXES; SODIUM PERCHLORATES; SOLVENT EXTRACTION; TRACER TECHNIQUES
- Descriptors DEC
- ALKALI METAL COMPOUNDS; CHLORINE COMPOUNDS; COMPLEXES; DISPERSIONS; HALOGEN COMPOUNDS; HOMOGENEOUS MIXTURES; ISOTOPE APPLICATIONS; MIXTURES; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; ORGANIC POLYMERS; OXYGEN COMPOUNDS; PERCHLORATES; POLYMERS; SEPARATION PROCESSES; SODIUM COMPOUNDS; SOLUTIONS