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Binary ionic liquid systems

An example of a binary ionic liquid system is a mixture of aluminium (III) chloride and 1,3-dialkylimidazolium chloride. It contains several different ionic species and their m.p. and properties depend upon the mole fractions of AICI3... [Pg.232]

Phase Behaviour of Binary Ionic Liquid Systems... [Pg.369]

The phase behaviour of binary ionic liquid systems can roughly be divided into three classes (i) ionic liquids with dissolved gases, (ii) ionic liquids with water and (hi) ionic liquids with organic solvents. The first class involves vapour-liquid equilibrium (VLE) data, whereas the last two classes mainly involve liquid-liquid equilibrium (LLE) data. [Pg.369]

The most investigated binary ionic liquid systems are mixtures with carbon dioxide (CO2). In 1999, Blanchard et al showed that the solubility of CO2 in imidazolium-based ionic liquids is very high, however, CO2 is not able to dissolve any ionic liquid. Therefore, it was found possible to extract a solute from an ionic liquid using supercritical CO2 without any contamination by the ionic liquid. ... [Pg.369]

More reliable phase behaviour predictions for binary ionic liquid systems with carbon dioxide or organics come from group-contribution equations of state, such as the universal functional activity coefficient (UNIFAC) method, the group-contribution nonrandom lattice ffuid equation of... [Pg.381]

Banerjee, T., Singh, M. K., Khanna, A. Prediction of binary VLE for imidazolium based ionic liquid systems using COSMO-RS. Ind. Eng. Chem. Res. 2006, 45, 3207-3219. [Pg.311]

Figure 11.2 (p,jc) section of the phase behaviour of binary ionic liquid + CO2 systems. [Pg.370]

Common UCST behaviour has also been observed for mixtures consisting of two ionic liquids with the same anion and a different cation.Less common lower eritical solution temperature (LCST) behaviour has been observed for binary ionic liquid mixtures with benzene,chloroalkanes " and polymers. Interestingly, the LCST behaviour of benzene with an imidazo-lium-based ionic liquid changed via hour-glass to UCST behaviour when the imidazolium alkyl chain length was increased.Moreover, imidazolium-based ionic liquids were found to form clathrate structures with benzene at low temperatures, whereas the solid-liquid equilibria (SLE) of other organics or water with ionic liquids are simple eutectic systems. [Pg.374]

Althought originally developed for systems involving nonelectrolytes, the NRTL model has successfully been applied to correlate the UCST behaviour of binary ionic liquid with water 207,20s organics. ... [Pg.380]

The phase behaviours of binary and ternary ionic liquid mixtures with carbon dioxide,organics " and water " have been determined using COSMO-RS. In the COSMO-RS framework, ionic liquids are considered to be completely dissociated into cations and anions. Ionic liquids are thus taken as an equimolar mixture of two distinct ions, which contribute as two different compounds. Because ionic liquids only dissociate in the presence of strongly polar substances, the COSMO-RS prediction of the phase behaviour of ionic liquid systems with polar compounds (water and alcohols) is more accurate than that of ionic liquid systems with nonpolar compounds (carbon dioxide and organics). Especially the COSMO-RS prediciton of the solubility of (relatively nonpolar) carbon dioxide in ionic liquids shows considerable deviations ( 15 %) from experimental values. lUPAC Technical Reports document the measurements of the thermodynamic and thermophysical properties of l-hexyl-3-methylimidazolium bis [(trifluoromethyl)sulfonyl]amide and the recommended values. ... [Pg.383]

It should be noted that the synthesis of highly pure, binary ionic liquids places particular demands on the preparative work. The purity of the system is essential for many solvent applications and for the characterization of their physical and chemical properties (Wasserscheid Keim, 2000). [Pg.497]

Guo Z, Kahveci D, Ozcelik B, Xu X. 2009. Improving enzymatic production of diglycerides by engineering binary ionic liquid medium system. New Botechnol 26 37-43. [Pg.354]

Equation (S.21) is normally used in metallic systems for substitutional phases such as liquid, b.c.c., f.c.c., etc. It can also be used to a limited extent for ceramic systems and useful predictions can be found in the case of quasi-binary and quasi-temary oxide systems (Kaufman and Nesor 1978). However, for phases such as interstitial solutions, ordered intermetallics, ceramic compounds, slags, ionic liquids and aqueous solutions, simple substitutional models are generally not adequate and more appropriate models will be discussed in Sections 5.4 and 5.5. [Pg.114]

Kato, R., Krummen, M., and Gmehling, J., Measurement and correlation of vapor-liquid equilibria and excess enthalpies of binary systems containing ionic liquids and hydrocarbons. Fluid Phase Equilib., 224,47,2004. [Pg.63]

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