TY - JOUR
T1 - Fluid-phase behavior of {1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide, [C(6)mim][NTf2], plus C-2-C-8 n-alcohol} mixtures: Liquid-liquid equilibrium and excess volumes
AU - Guedes, Henrique José Rodrigues
AU - DQ Group Author
AU - Rebelo, Luis Paulo
AU - Esperanca, Jose Manuel
N1 - Lachwa, Joanna - ITQB
PY - 2006/1/1
Y1 - 2006/1/1
N2 - In the frame of the IUPAC Project entitled Thermodynamics of ionic liquids, ionic liquid mixtures, and the deVelopment of standarized systems, 1- hexyl- 3- methylimidazolium bis( trifluoromethylsulfonyl) imide, [C(6)mim][ NTf2], was selected as the "model" ionic liquid to perform round-robin measurements on a series of ionic liquid properties. In this work, the temperature- composition liquid-liquid equilibria of this ionic liquid with linear alkan-1- ols, CnH(2(n)+ 1) OH, with n) 4, 5, 6, and 8, were determined at a nominal pressure of 0.1 MPa and up to 50 MPa for n) 4, 5, and 6. Excess molar volumes, V-E, of mixtures of this same ionic liquid with linear alkan1- ols, CnH(2n+1)OH, with n ranging from 2 to 5, were measured at a nominal pressure of 0.1 MPa. The consistency between the two sets of experimental data ( phase diagrams and VE) was analyzed from a theoretical perspective; we noticed that as the alkyl chain length, n, of the linear alcohol varies both the pressure dependence of the phase diagrams and the critical excess molar volume change sign.
AB - In the frame of the IUPAC Project entitled Thermodynamics of ionic liquids, ionic liquid mixtures, and the deVelopment of standarized systems, 1- hexyl- 3- methylimidazolium bis( trifluoromethylsulfonyl) imide, [C(6)mim][ NTf2], was selected as the "model" ionic liquid to perform round-robin measurements on a series of ionic liquid properties. In this work, the temperature- composition liquid-liquid equilibria of this ionic liquid with linear alkan-1- ols, CnH(2(n)+ 1) OH, with n) 4, 5, 6, and 8, were determined at a nominal pressure of 0.1 MPa and up to 50 MPa for n) 4, 5, and 6. Excess molar volumes, V-E, of mixtures of this same ionic liquid with linear alkan1- ols, CnH(2n+1)OH, with n ranging from 2 to 5, were measured at a nominal pressure of 0.1 MPa. The consistency between the two sets of experimental data ( phase diagrams and VE) was analyzed from a theoretical perspective; we noticed that as the alkyl chain length, n, of the linear alcohol varies both the pressure dependence of the phase diagrams and the critical excess molar volume change sign.
KW - TEMPERATURE IONIC LIQUIDS
KW - WATER
KW - PRESSURES
KW - SOLVENTS
KW - SYSTEMS
KW - BINARY-MIXTURES
KW - BUTAN-1-OL
KW - FUTURE
U2 - 10.1021/je060307z
DO - 10.1021/je060307z
M3 - Article
VL - 51
SP - 2215
EP - 2221
JO - Journal of Chemical and Engineering Data
JF - Journal of Chemical and Engineering Data
SN - 0021-9568
IS - 6
ER -