with ternary phase diagram

Acetone is to be extracted from a 30wt% acetone (A) and 70wt% ethyl acetate (C) feed at 30C, using pure water (S) as the solvent, by the cascade. The final raffinate is to contain 5wt% acetone on a water-free basis. Determine the minimum solvent-tofeed ratios and the equilibrium stages required for two intermediate S/F ratios. Acetone is to be extracted from a 30wt% acetone (A) and 70wt% ethyl acetate (C) feed at 30C, using pure water (S) as the solvent, by the cascade. The final raffinate is to contain 5wt% acetone on a water-free basis. Determine the minimum solvent-tofeed ratios and the equilibrium stages required for two intermediate S/F ratios