Salting-out effects in aqueous ionic liquid solutions: Cloud-point temperature shifts

Article Abstract:

A study of the influence on the liquid-liquid(L-L) phase diagram of aqueous solutions comprising the model ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, [bmim][B[F.sub.4]] on introducing the three inorganic salts , NaCl, [Na.sub.2]S[O.sub.4], and [Na.sub.3]P[O.sub.4] is done. It was observed that all three inorganic salts initiate salting-out effect, resulting to upward shifts of the L-L demixing temperatures of the systems and a correlation between the ionic strength of the solution.

Methyl groups, Methyl compounds, Hydration (Chemistry)

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On the critical temperature, normal boiling point, and vapor pressure of ionic liquids

Article Abstract:

One-stage, reduced-pressure distillations at moderate temperature of 1-decyl- and 1-dodecyl-3-methylimida-zolium bistrifilamide ([Ntf2)(super -)]) ionic liquids (ILs) is preformed. The predictions are based on experimental surface tension and density data, which are used to estimate the critical points of several ILs and their corresponding normal boiling temperatures.

Ions, Surface tension, Transition temperature, Phase transition temperatures

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Mutual solubilities of water and the [[C.sub.n]mim][[Tf.sub.2]N] hydrophobic ionic liquids

Article Abstract:

The mutual solubilities are measured for [[C.sub.2]-[C.sub.8]mim][[Tf.sub.2]N] (n-alkyl-3-methylimidazolium bis-(trifluoromethylsulfonyl)imide) and water at various temperature and atmospheric pressure. The Gibbs energy, enthalpy and entropy at infinite dilution are estimated and have shown that the solubility of the ionic liquids in water is entropically driven.

Science & research, Research, Properties, Alkyl groups, Hydrophobic effect

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