Mutual Solubilities of Ammonium-based Ionic Liquids with Water and with Water/Methanol Mixture

0383278 - ÚCHP 2013 RIV NL eng J - Článek v odborném periodiku
Machanová, Karolina - Jacquemin, J. - Wagner, Zdeněk - Bendová, Magdalena
Mutual Solubilities of Ammonium-based Ionic Liquids with Water and with Water/Methanol Mixture.
Procedia Engineering. Roč. 42, SI (2012), s. 1229-1241. E-ISSN 1877-7058.
[International Congress of Chemical and Process Engineering CHISA 2012 and 15th Conference PRES 2012 /20./. Prague, 25.08.2012-29.08.2012]
Institucionální podpora: RVO:67985858
Klíčová slova: Ionic liquids * liquid-liquid equilibria * solubility
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie

This work presents a study on solubility in water and in water/methanol mixture of a set of ILs composed of the bis(trifluoromethylsulfonyl)imide anion and of the N-alkyl-triethyl-ammonium cation (abbrev. [NR,222][NTf2]) with the alkyl chain R ranging from 6 to 12 carbons. Mutual solubilities between ILs and water, as well as between ILs and methanol/water mixture were investigated in detail. These solubilities were measured using two well-known and accurate experimental techniques based on a volumetric and a cloud-point methods. Both methods enabled us to measure the Tx diagrams reflecting the mutual solubilities between water (or water/methanol) and selected ILs in the temperature range from 293.15 to 338.15 K. The data were fitted by using the modified Flory-Huggins equation proposed by de Sousa and Rebelo and compared also with the prediction carried out by the Cosmo-RS methodology.
Trvalý link: http://hdl.handle.net/11104/0216318