USTC-Solvex is a modular Cortix application used to model solvent extraction processes of interest to uranium processing. This work discusses water extraction into a solution of tri-n-butyl phosphate (TBP) and inert diluent in contact with a gas/vapor phase. The use case models a three-phase (aqueous, organic, vapor), single-stage fast mixer–separator at the system-level of theory wherein species concentrations are computed in all three phases that vary with time. Humidification of the gas phase, aeration of the aqueous phase, and complexation of water in the organic phase are quantified in relation to the chemical equilibrium concentrations (stage efficiency). A parametric study will be conducted to provide insight into the sensitivity of the system based on input conditions, such as relative humidity and species residence time.
