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[Display omitted] • Liquid-liquid equilibria for 5 nonaqueous two-phase systems (+1 aqueous two-phase system) has been investigated. • Different types of luminance dependency in the vicinity of cloud-point has been pointed out. • The use of NRTL model and empirical correlation for collected data has been discussed. The cloud–point method was used to determine temperatures located on the binodal surface for several nonaqueous two-phase systems containing formamide, and: {1–pentanol + NaBr} or {1–pentanol + NaNO 3 }, or {1–butanol + NaNO 3 }, or {1–butanol + D–sorbitol}, or {acetonitrile + D–fructose}. For comparison purposes, the measurements were made in the water + acetonitrile + D-fructose system. The measured temperatures ranged from about 0 to 90 °C. The experimental data were described by the NRTL model as well as through several empirical equations with the parameters depending on temperature. Finally, the paper discusses the advantages and disadvantages of individual solutions. [ABSTRACT FROM AUTHOR]

Abstract: Densities of pure 1-ethyl-3-methylimidazolium ethylsulfate ionic liquid – [C2mim][EtSO4] and its mixtures with methanol have been measured with an accuracy of ±0.2kg·m−3, over the temperature range (283.15 to 333.15)K and pressure range (0.1 to 35)MPa, using a vibrating tube densimeter. Excess volumes have been calculated directly from the experimental densities. The latter data have been correlated by the Tait equation with the temperature dependent parameters for the pure ionic liquid and by a van Laar-type equation, involving parameters dependent on temperature and pressure for the mixtures. The isobaric expansivity, isothermal compressibility, and related excess properties have been calculated. The exceptionally strong influence of pressure and temperature on these properties has been observed. [Copyright &y& Elsevier]

Abstract: In the present work the binary mixtures containing the ionic liquid N-hexylisoquinolinium thiocyanate, [HiQuin][SCN] and water was considered as a new working pair for absorption refrigeration. Experimental heat capacities and excess enthalpies of the binary mixtures were determined at different ionic liquid mole fractions over a wide range of temperature at ambient pressure. The influence of temperature and composition on measured properties was assessed and suitable equations were used to correlate the experimental data. [Copyright &y& Elsevier]

The (liquid + liquid) solubility curves have been determined by a synthetic method for six binary mixtures of [acetonitrile + {heptyl methyl ether CH 3 O n C 7 H 15 , or ethyl hexyl ether C 2 H 5 O n C 6 H 13 , or pentyl propyl ether n C 3 H 7 O n C 5 H 11 , or isopentyl propyl ether n C 3 H 7 O i C 5 H 11 , or dibutyl ether n C 4 H 9 O n C 4 H 9 , or butyl isobutyl ether n C 4 H 9 O i C 4 H 9 }]. The possibility of the COSMO-SAC model to account for the thermodynamic differences between these systems has been tested and the discussion on the influence of screening charge of ethers on the system properties was undertaken. [ABSTRACT FROM AUTHOR]

Abstract: The experimental densities for the binary or ternary systems were determined at T =(298.15, 303.15, and 313.15)K. The ionic liquid methyl trioctylammonium bis(trifluoromethylsulfonyl)imide ([MOA]+[Tf2N]−) was used for three of the five binary systems studied. The binary systems were ([MOA]+[Tf2N]− +2-propanol or 1-butanol or 2-butanol) and (1-butanol or 2-butanol+ethyl acetate). The ternary systems were {methyl trioctylammonium bis(trifluoromethylsulfonyl)imide+2-propanol or 1-butanol or 2-butanol+ethyl acetate}. The binary and ternary excess molar volumes for the above systems were calculated from the experimental density values for each temperature. The Redlich–Kister smoothing polynomial was fitted to the binary excess molar volume data. Virial-Based Mixing Rules were used to correlate the binary excess molar volume data. The binary excess molar volume results showed both negative and positive values over the entire composition range for all the temperatures. The ternary excess molar volume data were successfully correlated with the Cibulka equation using the Redlich–Kister binary parameters. [Copyright &y& Elsevier]