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Phase Behaviour of Ionic Liquid Organic

The binary phase behaviour of ionic liquids with different organic solvents has been measured. These organics include alkanes, alkenes, alkynes, cyclic hydrocarbons,  [Pg.373]

Finally, the choice of anion of the ionic liquid has a large impact on the UCST of the system. Organics are much more soluble in ionic liquids with the [Pg.373]

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]


Most (ionic liquid + organic) show immiscibility in the liquid phase with an upper critical solution temperature (UCST) found at low mole fractions of the ionic liquid. Therefore, the phase behaviour of (ionic liquid + organic) is similar to that of (ionic liquid + water) (Figure 11.4). However, unlike the system with water, the UCST of (ionic liquid + organic) decreases with increasing alkyl chain length of the cation. 58,60,84,89 92... [Pg.373]

Corresponding-states correlations, which were used for describing the phase behaviour of (ionic liquid- -organics) systems,also suffer from the same problem that the critical parameters of ionic liquids are required yet unknown. [Pg.381]


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