Synergistic extraction equilibrium of lanthanoids(III) with 2-thenoyltrifluoroacetone and nitrogen-containing bidentate ligands, ethylenediamine derivatives
- Tohoku Univ., Sendai (Japan). Dept. of Chemistry
The synergistic extraction of lanthanoids(III), Ln(III), i.e., La, Sm, Tb, Tm and Lu, using 2-thenoyltrifluoroacetone (Htta) and nitrogen-containing neutral bidentate ligands (S), i.e., three ethylenediamine derivatives, such as N,N{prime}-dimethylethylenediamine (dmen), N,N{prime}-diethylethylenediamine (deen) and cis-1,2-cyclohexanediamine (chda), was studied in the benzene and aqueous system. The synergistic enhancement in these extraction systems was mainly attributed to the formation of an adduct, Ln(tta){sub 3}S, in the benzene phase. The variation of the adduct formation constants ({beta}{sub S,1}) was discussed with the basicity of ligands and structure hindrance around the metal ion.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 343789
- Journal Information:
- Solvent Extraction and Ion Exchange, Journal Name: Solvent Extraction and Ion Exchange Journal Issue: 2 Vol. 17; ISSN 0736-6299; ISSN SEIEDB
- Country of Publication:
- United States
- Language:
- English
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