Separation and industrial process optimization of acetone-methanol azeotrope system
In order to effectively separate acetone-methanol azeotropic mixtures and realize industrial applications,the ternary vapor-liquid equilibrium data of[BMMIM][Ac](1-butyl-2,3-dimethylimidazolium acetate)as extractant were determined at 101.3 kPa.The experimental results show that the addition of ionic liquids will cause a significant salting-out effect in the system.The relative volatility of the acetone-methanol system increases with the increase of the molar fraction of the ionic liquids(ILs)in the system.When the ionic liquids molar fraction reaches a certain level,the azeotropic phenomenon disappears.The experimental data were analyzed and the NRTL model was correlated to obtain binary interaction parameters.The molar fraction of ionic liquids required to break the azeotropic minimum is 0.019 7.By using Gaussian 09 software,the pair-to-pair-to-molecule interaction energy was calculated at the molecular level to explore the separation mechanism.The extraction distillation process of the acetone-methanol system was simulated by Aspen Plus software,and the optimal process parameters were optimized under the condition that the molar fractions of acetone and methanol yield of the top of the tower were 99.99％.The results show that the extraction of acetone-methanol azeotrope using[BMMIM][Ac]as the extractant has a good effect.
acetonemethanolvapor-liquid equilibriumGaussian softwareAspen Plus
万方数据
维普
