The liquid-liquid extraction of uranium(VI) from aqueous nitric acid with bis(octylsulfinyl)methane (BOSM) has been studied
over a wide range of conditions. 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 descreased.
Extraction also increased with increasing extractant concentration. The influence of temperature and salting-out agent concentration
on the extraction equilibrium has also been investigated, and the enthalpy of the extraction reaction was estimated.