Abstract
By combining Electrolyte NRTL and the NRTL activity coefficient model, and using the reaction kinetics of propylene chlorohydrins (PC) saponification and propylene oxide (PO) hydrolysis, the simulation of the saponification process in propylene oxide plant is accomplished. In order to reduce the Chemical Oxygen Demand (COD) of wastewater and improve the yield for propylene oxide, the effects of several conditions for the COD of wastewater are studied. The simulation results showed that the yield for propylene oxide has increased 0.47% and the COD of wastewater has reduced 371 mg/l in the case of the optimum condition. Moreover, the unit operation models and thermodynamic models used here had been proved accurately and reliably to simulate the saponification system. So the optimized operating conditions could provide the theoretical basis to the operation of propylene oxide plant.
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