the external phase to the provided stripping solution for extraction of uranium 6 and its reduction to uranium 4 the extractant which may be employed is the mixture of di 2 ethylhexylphosphoric acid and trioctylphosphine oxide d2ehpa topo or d 2 t a reductant for the internal phase may be ferrous sulfate other impurities may be extracted by selective reagents di tridecylamine for instance dissolved in a suitable organic solvent is functional for the extraction of vanadium tungsten and iron trilaurylamine is functional for the extraction of uranium and molybdenum tertiary amines containing from about 8 to about 10 carbon atoms in each attached hydrocarbon group are functional for the extraction of uranium vanadium and chromium triisooctylamine is functional for the extraction of cobalt and uranium triisodecylamine is functional for the extraction of cobalt and uranium triisodecylamine is functional for the extraction of uranium and vanadium tri tridecylamine is functional for the extraction of molybdenum rhenium and uranium the methyl ammonium chloride salt of tertiary amines containing from about 8 to about 10 carbon atoms in each hydrocarbon group attached to the nitrogen is functional for the extraction of vanadium tungsten chromium and uranium from neutral as well as alkaline solutions oximes are functional for copper extractions dinonyl napthalene sulfonic acids are functional for extraction of a variety of metals from acids such as phosphoric acid organics useful to form the external.