The solid-liquid and liquid-liquid phase equilibria of ionic liquids (ILs) basing on alkyl-(2-hydroxyethyl)-dimethyl-ammoniumcation [C_n] and different anions [Br^-, or N(CN)₂^-, or PF₆^-, or BF₄^-, or N(CF₃SO₂)₂^-] [1] and 1-alkoxymethyl- 3-methyl-imidazolium, ([C_nH_2n+1OCH₂mim]) or 1,3-dialkoxymethyl-imidazolium ([(C_nH_2n+1OCH₂)₂im]) cations with different anions {BF₄^-, N(CF₃SO₂)₂^-} [2] have been measured. The determination of the IL - solvent interaction of these salts and alkyl-methyl-imidazolium cations with {[CH₃SO₄^-], or [OcSO₄^-], or [MDEGSO₄^-], or [TOS^-]} anions via the solubility measurements, or excess molar volumes or activity coefficients at infinite dilution measurements have been performed. The influence of high pressure up to 600MPa on IL's SLE has been also investigated. These salts mainly exhibit simple eutectic systems with immiscibility in the liquid phase with upper critical solution temperatures (UCST).

The SLE and LLE curves were correlated by means of the different G^Ex models utilizing parameters derived from the SLE or LLE. The root-mean-square deviations of the solubility temperatures for all calculated data depend on the particular system and the equation used. The (liquid + liquid) phase equilibria was predicted for many systems with COSMO-RS model.

Due to the fascinating physico-chemical properties of these ionic liquids, they seem to be significant in development of new technologies.

References:

[1] U. Domańska, R. Bogel-Łukasik, J. Phys. Chem. B 2005, 109, 12124.

[2] U. Domańska, A. Marciniak, J. Chem. Thermodyn. 2005, 37, 577.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/8160 must be provided.