Study On Kinetics Of Methyl Acetate Synthesis And Simulation Of Reactive Distillation Process

The research about synthesis reactioin kinetics and process simulation was put up based on the success in middle experiment of the synthesis of methyl acetate through reactive distillation technology.The kinetics of methyl acetate synthesis reaction was investigated in a batch stirred reactor with sulfuric acid(99.8%)as catalyst, the parameters of kinetics were measured, and the efforts of catalyst loading and reaction temperature were also studied.The kinetic equation based on the per catalyst quality for describing the synthesis of methyl acetate was obtained.The reactive distillation synthesis middle experiment was carried out in the pilot plant with novel composite CTST reactive distillation column, φ 125/φ 140 in diameter.We got satisfying experiment data,which proved the novel CTST plate was an availble and feasible internal parts of reactive distillation column structure.A simulation program based on the non-equilibrium rate model is established, and simulated the process of methyl acetate synthesis.The reaction kinetics measured above was employed.The caculated results including concentration of top product, temperature profile and concentration profiles of vapor and liquid phase were in good agreement with the experimental data, which proved that the model built up was effectively applied to the research of reactive distillation process.The ratio of methanol to acetic acid in feed and reflux ratio that effected the process were investigated, and we obtained that: the influence of reflux ratio on results pesented the tendency of increase first and then decline, there exist an optimization refux ratio range 1.2-1.4.There was an fitting ratio of methanol to acetic acid 1.2 in feed, so the high-purity methyl acetate (≥99.5%) could be got and the acetic acid should be used up for reducing the following separation load.