Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Studies of the Liquid-Liquid Partition Systems. III. The Solvent Extraction of Americium(III) and Europium(III) Thiocyanate Complexes with Tributylphosphate
Tatsuya Sekine
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1965 Volume 38 Issue 11 Pages 1972-1978


The two-phase distribution of americium(III) and europium (III) has been studied between the hexane solution of tributylphosphate (TBP) and the aqueous solution of sodium thiocyanate at 25°C. From the distribution data when the organic phase was 5% (by volume) TBP in hexane and the aqueous phase was 5 M Na(SCN, ClO4), the following equilibrium constants have been obtained by a least-squares method:
(Remark: Graphics omitted.)
A remarkable salting-out effect has been observed when sodium perchlorate is added to the aqueous phase. This salting-out effect has been discussed, as has the solvation number of TBP in the adduct complexes in the organic phase.

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