Abstract
The solvent extraction of alkaline-earth and some bivalent transition metal ions such as Co 2+, Ni 2+, Cu 2+, Zn 2+ and Cd 2+ with the bidentate phosphine oxide compound, bis(diphenylphosphinyl)-methane (BDPPM), and perchlorate into 1,2-dichloroethane has been investigated. When benzene is used as the solvent, the complexes consisting of metal ion, BDPPM and perchlorate are not extracted but are precipitated at the liquid-liquid interface. The precipitates have been isolated and their compositions determined.
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