Simulation of Salt-Containing Extractive Distillation for the System of Ethanol/Water/Ethanediol/KAc. 2. Simulation of Salt-Containing Extractive Distillation

The salt-containing extractive distillation for the ethanol/water/ethanediol/KAc system of an industrial plant (2300T/Y) was simulated by SCLCM and an improved Rose relaxation method. The simulation results agreed well with industrial data. The design of the extractive distillation column was optimized under the conditions of different total stage numbers, different feeding locations, and different amounts of mixed agent. The results showed that 20 stages, a feeding location at 9 stages, and an amount of mixed agent of 2.0 kmol/h may be the optimum operation conditions. The simulation method of salt-containing extractive distillation is simple and effective for the system.