The Simulation and Optimization of Toluene-Ethanol Azeotrope With Extractive Distillation

Toluene-ethanol azeotropic system was separated of the simulation and studied using Aspen Plus chemical simulation software.Butyl benzene was selected as suitable solvent for extractive distillation applying Flash 2 module.Process of extractive distillation was confirmed,and feed plate location,reflux ratio and solvent ratio of extractive distillation tower and solvent recovery tower on separation effect were researched using sensitivity analysis module.When the solvent ratio was 2.2,the product of ethanol mass fractiont is 99.9%,and toluene is 99.5%,solvent recovery rate is approximately 99.5%.