Abstract
The distribution behaviour of fourteen metal halides between the liquid immiscible phases in the system AlBr 3KBr was investigated at 200°C. Mainly ionic compounds prefer the polar, KBr-rich phase, whereas covalent-type halides are being enriched in the AlBr 3 phase. The highest separation factor obtained is 126 for CsZr. Other separations seem to be possible, e.g. ZrNb or NbTa, although only with multistage methods. Since UO 2 powders are easily dissolved by molten AlBr 3KBr, as has been shown with three different mixtures, the distribution coefficients previously measured could be confirmed for several fission products of an irradiated sample. The good solvent properties of molten AlBr 3KBr mixtures with a molar ratio K A1 < 1 were demonstrated for one example (BaBr 2), whereas in a melt of equimolar composition solubility is practically nil.
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