Ternary liquid–liquid equilibria of bis(trifluoromethylsulfonyl)-amide based ionic liquids + 2-propanol + di-iso-propyl ether

Ternary liquid–liquid equilibria for 3 systems containing ionic liquids 4-(2-methoxyethyl)-4-methylmorpholinium bis(trifluoromethylsulfonyl)-amide, 1-(2-methoxyethyl)-1-methylpiperidinium bis(trifluoromethylsulfonyl)-amide, 1-(2-methoxyethyl)-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)-amide) + 2-propanol + di-iso-propyl ether have been determined at T = 298.15 K. The solute distribution coefficient and the selectivity were calculated for all systems. The experimental results have been correlated using NRTL model. The influence of cation structure on selectivity and solute distribution ratio is discussed.