A newly developed crystallisation scheme produces single enantiomers from asymmetric mixtures of stereoisomers. The process was modified, adapted and evaluated on bicalutamide, the active pharmaceutical ingredient of the drug Casodex (TM). A comprehensive solvent/antisolvent screening was carried out based on the COSMO-SAC model and a solvent database of 1432 compounds. Ternary and quaternary phase diagrams of the enantiomers and promising solvent candidates were derived and compared to experimental data. Solid-liquid equilibrium (SLE) model based chiral separation of bicalutamide enantiomers was conducted and the process performance was evaluated in terms of yield and product purity. A concept for internal recycling of process streams enhances the overall yield. (C) 2010 Elsevier B.V. All rights reserved.