EXTRACTION OF PR(III), ND(III), SM(III), EU(III), AND GD(III) NITRATES BY MIXTURES OF DI-ISO-OCTYLMETHYLPHOSPHONATE AND TRIALKYLMETHYLAMMONIUM NITRATE FROM AQUEOUS SALT-SOLUTIONS

Authors
PYARTMAN AK PUZIKOV EA KOPYRIN AA BOGATOV KB
Citation
Ak. Pyartman et al., EXTRACTION OF PR(III), ND(III), SM(III), EU(III), AND GD(III) NITRATES BY MIXTURES OF DI-ISO-OCTYLMETHYLPHOSPHONATE AND TRIALKYLMETHYLAMMONIUM NITRATE FROM AQUEOUS SALT-SOLUTIONS, Radiochemistry, 36(6), 1994, pp. 543-547
Citations number
7
Categorie Soggetti
Chemistry Analytical","Chemistry Inorganic & Nuclear
Journal title
Radiochemistry → ACNP
ISSN journal
10663622
Volume
36
Issue
6
Year of publication
1994
Pages
543 - 547
Database
ISI
SICI code
1066-3622(1994)36:6<543:EOPNSE>2.0.ZU;2-A
Abstract
The extraction of trivalent rare-earth metal (Pr-Gd) nitrates by mixtu res of di-iso-octylmethylphosphonate ((DOMP) and trialkylmethylammoniu m nitrate (TAMAN) in various ratios is studied at 298.15 K and pH 2. C ompounds of formula Ln(NO3)(3) . 3S, Ln(NO3)(3) . iA (i = 2, 3), and L n(NO3)(3) . jA .(3 - j)S (j = 1, 2), where A is TAMAN and S is DOMP, a re formed in the organic phase. The extraction constants of the mixed- ligand metal solvates obey statistical laws and decrease in the order Pr > Nd > Sm > Eu > Gd.