Separation of THF and water by room temperature ionic liquids.
Liquid-liquid equilibrium data are presented for mixtures of 1-(2-hydroxyethyl)-3-methylimidazolium chloride or tetrafluoroborate + tetrahydrofuran(THF) + water at 293.15 K. The data presented provides a valuable insight into how the environmentally friendly ionic liquid solvent can have the separation power of THF-water azeotropic systems. The sloping of the tie lines towards the THF vertex is investigated for mixtures of 1-(2-hydroxyethyl)-3-methylimidazolium chloride (or tetrafluoroborate) + THF + water. Selectivity values, derived from the tie line data, indicate that these two ionic liquids are suitable solvents for the liquid-liquid extraction of water from THF.
Hu
X
X
Laboratory of Separation Science & Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing. xshu@home.ipe.ac.cn
Yu
J
J
Liu
H
H
D001881:Borates / Q000032:analysis*; D002627:Chemistry, Physical / Q000379:methods; D005663:Furans / Q000032:analysis*; D007093:Imidazoles / Q000032:analysis; D007477:Ions; D008956:Models, Chemical; D012997:Solvents / Q000737:chemistry*; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
D001881:Borates; D005663:Furans; D007093:Imidazoles; D007477:Ions; D012997:Solvents; D014867:Water; C018674:tetrahydrofuran; C048524:1-methyl-3-ethylimidazolium