Distribution of micro-amounts of europium in the two-phase water-HCl-nitrobenzene-N,N'-dimethyl-N,N'-diphenyl-2,6-dipicolinamide-hydrogen dicarbollylcobaltate extraction system

• Published in: Journal of the Serbian Chemical Society Vol. 74; no. 7; pp. 781 - 787
• Main Authors: Makrlík, Emanuel, Vaňura, Petr, Selucký, Pavel, Babain, Vasily, Smirnov, Ivan
• Format: Journal Article
• Language: English
• Published: Serbian Chemical Society 2009
• Subjects: europium; extraction and stability constants; hydrogen dicarbollylcobaltate; n,n'-dimethyl-n,n'-diphenyl-2,6-dipicolinamide; water-nitrobenzene system
• ISSN: 0352-5139; 1820-7421
• DOI: 10.2298/JSC0907781M

Extraction of micro-amounts of europium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of N,N'-dimethyl- -N,N'-diphenyl-2,6-dipicolinamide (MePhDPA, L) was investigated. The equilibrium data were explained assuming that the species HL+, + HL2 , 3+ EuL2 and 3+ EuL3 are extracted into the organic phase. The values of the extraction and stability constants of the species in nitrobenzene saturated with water were determined. Ispitivana je ekstrakcija mikrokolicina europijuma vodonik-karbolilkobaltatom (H+B-) rastvorenim u nitrobenzenu, u prisustvu N,N'-dimetil-N,N'-difenil-2,6-dipiko-linamida (MePhDPA, L). Podaci za stanje ravnoteze objasnjeni su uz pretpostavku da su joni HL+, + HL2,3+ EuL2 i 3+ EuL3 ekstrahovani organskom fazom. Odredjene su vrednosti konstanti ekstrakcije i stabilnosti jona u vodom zasicenom nitrobenzenu.