High purity produced in a liquid-liquid heterogeneous reaction, reaction: A+B+C (1=C93C, ), side reaction: A+CHD (Reversible reaction, r = cc.). The raw material A is liquid and impurities. It includes D and E. The raw material B is liquid, purity and expensive. A, D. B, C, E are ranged from low to high by volatility (there is the significant relative volatility between D and B) A is cheap. C and E can form azeotropes that is difficult to separation. Try to organize this process (consider the reactor). Give the reason and draw the flowsheet (based on Continuous flow)