离子液体萃取剂辅助分离乙腈＋水共沸物.

The azeotropic mixture of acetonitrile and water is always encountered in industrial engineering, and it is difficult to separate them using ordinary separation method, where some special separation Technologies like extractive separation must be employed. Therefore, the vapor-liquid equilibrium (VLE) for the ternary mixture of acetonitrile + water + l-ethyl-3-methylimidazolium glycolate ([EMIM][GAC]) was firstly determined through experimental measurement and the ionic liquid of [KMIM][GAC] was verified to be effective in eliminating the azeotropy of acetonitrile and water mixture. Based on VLE data, the binary interaction parameters in NKTL model were then obtained with the overall average absolute deviations 0. 67K and 0. 007 8 for equilibrium temperature and vapor phase composition, respectively. Finally, the separation process with one extractive distillation column (EDO and one solvent recovery column was built with Aspen Plus software. The simulation results showed that the IL entrainer of [KMIM][GACJ could decrease the molar solvent ratio from 0. 94 to 0. 20 and 9. 4% for the heating duty of KDC. meanwhile the number of theoretical stage for KDC decreases from 53 to 20, comparing to ones of ethylene glycol entrainer. [ABSTRACT FROM AUTHOR]