TY - JOUR
T1 - Room-Temperature ionic liquids in liquid-liquid extraction
T2 - Effects of solubility in aqueous solutions on surface properties
AU - Toh, S. L.I.
AU - McFarlane, J.
AU - Tsouris, C.
AU - DePaoli, D. W.
AU - Luo, H.
AU - Dai, S.
PY - 2006
Y1 - 2006
N2 - The potential of room-temperature ionic liquids for use in chemical separations was assessed, particularly for liquid-liquid extraction. The solubility, surface tension, and electrical conductivity of a range of imidazolium-based ionic liquids in aqueous solution were measured at room temperature and atmospheric pressure as functions of ionic-liquid, sodium chloride, and potassium-chloride concentrations. Hydrophobic ionic liquids were studied, including 1-Cn -3-methylimidazolium cations, Cnmim+, with alkyl substitutions of varying chain length, where Cn=C2 (ethyl), C4 (butyl), C6 (hexyl), and C8 (octyl), in combination with bis(trifluoromethanesulfonyl)imide, NTf2-, and bis(perfluoroethanesulfonyl)imide, BETI-, anions. Hydrophilic compounds were also studied, with bromide anions and Cnmim+ and 1-Cn-2, 3-methylimidazolium, Cnbmim+, cations, where Cn=C12, C14 and C16 are solids at room temperature, and Cn=C8, C9, and C10 are liquids.
AB - The potential of room-temperature ionic liquids for use in chemical separations was assessed, particularly for liquid-liquid extraction. The solubility, surface tension, and electrical conductivity of a range of imidazolium-based ionic liquids in aqueous solution were measured at room temperature and atmospheric pressure as functions of ionic-liquid, sodium chloride, and potassium-chloride concentrations. Hydrophobic ionic liquids were studied, including 1-Cn -3-methylimidazolium cations, Cnmim+, with alkyl substitutions of varying chain length, where Cn=C2 (ethyl), C4 (butyl), C6 (hexyl), and C8 (octyl), in combination with bis(trifluoromethanesulfonyl)imide, NTf2-, and bis(perfluoroethanesulfonyl)imide, BETI-, anions. Hydrophilic compounds were also studied, with bromide anions and Cnmim+ and 1-Cn-2, 3-methylimidazolium, Cnbmim+, cations, where Cn=C12, C14 and C16 are solids at room temperature, and Cn=C8, C9, and C10 are liquids.
KW - Hydrophilic compounds
KW - Ionic liquids
KW - Liquid-liquid extraction
UR - http://www.scopus.com/inward/record.url?scp=31744431644&partnerID=8YFLogxK
U2 - 10.1080/07366290500388400
DO - 10.1080/07366290500388400
M3 - Article
AN - SCOPUS:31744431644
SN - 0736-6299
VL - 24
SP - 33
EP - 56
JO - Solvent Extraction and Ion Exchange
JF - Solvent Extraction and Ion Exchange
IS - 1
ER -