Operational Limits in Processes with Water, Salt, and Short-Chain Alcohol Mixtures as Aqueous Two-Phase Systems and Problems in Its Simulation

The low critical solution temperature (LCST) and minimum salt concentration that cause phase splitting in water short-chain alcohol mixtures were determined experimentally. alcohols, which are completely miscible with (methanol, ethanol, 1-propanol, 2-propanol, tert-butanol) most of the common salts (those Na+, K+, Ca2+, NH4+ cations Cl–, SO42–, CO32–, NO3– anions), studied. Experimentally data increased future development opportunities column sequences process design using aqueous two-phase systems (ATPSs) by establishing some salts, their operational limits. An example these transition extraction (PTE) separation processes was proposed discussed. Finally, use different thermodynamic models, such as extended UNIQUAC for electrolytes electrolyte nonrandom two-liquid (NRTL) model, equilibrium calculations LCSTs necessary simulation ATPS analyzed.