Dissertation > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > General issues > Chemical Process

Study on Separation of Acetonitrile and Ethyl Acetate Mixture by Batch Zeotropic Distillation

Author DiJianDong
Tutor BaiPeng
School Tianjin University
Course Chemical Engineering
Keywords Azeotropic distillation Batch Distillation Acetonitrile Ethyl acetate
Type Master's thesis
Year 2007
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Acetonitrile and ethyl acetate is a wide range of industrial applications in the chemical and pharmaceutical raw materials and fine chemical organic solvent . Forming an azeotropic mixture of both , using ordinary distillation methods can not be separated , its recycling is difficult . Acetonitrile - ethyl acetate azeotrope the distillation separation methods and technology research has not been reported in the literature . This paper studies azeotropic distillation separation heterogeneous intermittent acetonitrile - ethyl acetate azeotropic mixture . First azeotropic entrainer choice, the final selection of n-hexane to azeotropic entrainer and acetonitrile - ethyl acetate - n-hexane ternary system the vapor-liquid equilibrium experiments , verify that the n-hexane as azeotropic entrainer feasibility. And liquid-liquid equilibrium experimental determination of n-hexane - acetonitrile system to determine the parameters of heterogeneous hierarchical reflux conditions . Finally, the n-hexane as azeotropic entrainer acetonitrile - ethyl acetate intermittent azeotropic distillation separation experiments . The results showed that , using n-hexane as entrainer heterogeneous intermittent azeotropic distillation, enables the acetonitrile - ethyl acetate azeotropic mixture separation . The azeotropic distillation device is divided into the reboiler , 4 tower body , stratification , and condenser part , to establish the mathematical model of a heterogeneous batch azeotropic distillation process . Balance model of vapor-liquid equilibrium and liquid-liquid UNIFAC model is solved using the Newton-Raphson method and two-point implicit combined . Simulation run of the model and solving method for faster convergence acetonitrile - ethyl acetate - n-hexane ternary system simulation . The simulation results are in good agreement with the experimental data .

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