Dissertation > Industrial Technology > Chemical Industry > General issues > Chemical processes ( physical processes and physical and chemical processes ) > Separation process > Single-phase system liquid mixture separation process > Distillation and rectification

Study on Separation of Azeotrope Mixtures by Batch Extractive Distillation

Author ZhouJinBo
Tutor CuiXianBao
School Tianjin University
Course Chemical Engineering
Keywords Batch extractive distillation Solvent Selection UNIFAC Acetonitrile - toluene Acetonitrile - water Cyclohexane - butylamine Azeotropic - extractive distillation
CLC TQ028.31
Type Master's thesis
Year 2006
Downloads 366
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In this paper, theoretical analysis and experimental method of combining , the main research azeotrope by extractive distillation solvent selection and azeotrope batch extractive distillation process . Solvent is selected by the group contribution method and molecular design combined with the method to select the solvent of acetonitrile - Toluene Mixture selected extractant xylene , trimethylbenzene , propylbenzene , diethyl benzene , 1,3 - dimethyl-5 - ethylbenzene , toluene, tert-butyl and tert-butylbenzene . The vapor-liquid equilibrium calculations for the selected extraction agent, UNIFAC activity coefficient model . The vapor-liquid equilibrium experimental determination of the acetonitrile - toluene - cumene , acetonitrile - toluene - tert-butyl toluene, acetonitrile - toluene - diethyl benzene vapor-liquid equilibrium data fitted acetonitrile - toluene -tert-butyl , toluene - tert- butyl toluene , acetonitrile - diethylbenzene and toluene - diethylbenzene Wilson activity coefficient equation parameters. Intermittent extractive distillation experiments investigated the the different extractant separation of acetonitrile - toluene azeotrope effects and to study the impact of different operating parameters of batch extractive distillation process . Using ethylene glycol as solvent intermittent extraction the distillation separation acetonitrile - water azeotropic mixture , measured acetonitrile - ethylene glycol vapor-liquid equilibrium data of the system , and fitting the Wilson activity coefficient equation parameters . Acetonitrile - water azeotrope batch extractive distillation experiments , experimental results show that the use of ethylene glycol as a solvent acetonitrile - water azeotropic mixture can be effectively separated . Intermittent azeotropic - extraction distillation concepts and using the cyclohexane - butanamine azeotropic system with water as entrainer distillation process of intermittent azeotropic - extraction were studied.

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