Synergic extraction of rare earths with 2-thenoyltrifluoroacetone and phophoryl-type bidentate ligands such as tetraphenyldiphosphine dioxide or bis(diphenylphosphinyl) methane
✍ Scribed by Saeko Satake; Satoshi Tsukahara; Nobuo Suzuki
- Book ID
- 102624292
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 485 KB
- Volume
- 282
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
The synergic extraction of rare earth(III) ions (RE, La, Sm, Tb and Lu) using 2-thenoyltrifluoroacetone (Httal and phosphoryl-type uncharged bidentate ligands, such as tetraphenyldiphosphme dioxide (tpdpo) or bis(diphenylphosphinyljmethane (bdppm), was investigated in benzene. The synergic enhancement was attributed to the formation of the adduct RE&a),S, (n = 1 or 2 for tpdpo and n = 1 for bdppm) in benzene, where S denotes the uncharged ligand. The adduct formation constants &I and the synergic extraction constants were determined. For each RE(III), the #ls,t value for bdppm is larger than the &i and fls,* values for tpdpo and the & values for both ligands decrease with increasing atomic number of RE(II1).