화학공학소재연구정보센터
Journal of Chemical and Engineering Data, Vol.53, No.2, 427-433, 2008
Separation of ethyl acetate and ethanol by room temperature ionic liquids with the tetrafluoroborate anion
Liquid-liquid equilibrium data are presented for mixtures of 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim]BF(4)) or 1-(2-hydroxyethyl)-3-methylimidazolium tetrafluoroborate ([C(2)OHmim]BF(4)) or 1-ethyl-2,3-dimethylimidazolium tetrafluoroborate ([edmim]BF(4)) or 1-(2-hydroxyethyl)-2,3-dimethylimidazolium tetrafluoroborate ([C(2)OHdmim]BF(4)) + ethanol + ethyl acetate at 298.15 K. The distribution ratio and selectivity values, derived from the tie line data, show that [C(2)OHmim]BF(4) has better extraction capacity than other studied ionic liquids and that a hydroxyl group on the cation and a CH(3) group at the 2-position can obviously affect the interaction between the ionic liquid and ethanol. The experimental results show that [C(2)OHmim]BF(4) is potentially a candidate to separate ethyl acetate and ethanol by liquid-liquid extraction. The experimental tie lines were correlated with the NRTL equation.