Extraction of uranium(VI) with bis(octylsulfinyl)methane

The liquid-liquid extraction of uranium(VI) from aqueous nitric acid with b is(octylsulfinyl)methane (BOSM) has been studied over a wide range of condi tions. The extracted species appear to be UO2(NO3)(2). 2BOSM. It was found that the extraction increased with increasing nitric acid concentration up to 8.5 mol/l and then decreased. Extraction also increased with increasing extractant concentration. The influence of temperature and salting-out agen t concentration on the extraction equilibrium has also been investigated, a nd the enthalpy of the extraction reaction was estimated.