Physico-chemical Properties of Binary and Ternary Mixtures of Ethyl Acetate + Ethanol + 1-Butyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide at 298.15 K and Atmospheric Pressure

Abstract

Densities, viscosities and refractive indices have been measured at 298.15 K and atmospheric pressure for binary and ternary mixtures of ethanol, ethyl acetate and 1-butyl-3methyl-imidazolium bis(trifluoromethylsulfonyl) imide [C 4 mim][NTF 2 ]. From these experimental properties, the corresponding excess properties have been calculated and adequately fitted with the Redlich-Kister polynomial equation. The adjustable parameters and standard deviations between experimental and calculated values are reported. Interest of this mixture is due to the possibility of using [C 4 mim][NTF 2 ] as an entrainer in the extractive distillation of ethanol + ethyl acetate. These results are compared with previously determined experimental data for mixtures of ethyl acetate and/or ethanol with the ionic liquid 1-octyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide, [C 8 mim][NTF 2 ].

Physical Properties of Binary Mixtures of ILs with Water and Ethanol. A Review.

“…the exponential behaviour extends a smaller range of concentrations. Other experimental data for some of the systems presented have been also published, with similar results (Andreatta et al, 2009;Andreatta et al, 2010).…”

“…The dependence of n D with x IL is similar to that presented by ρ for the corresponding systems with ethanol, and it is more rounded than that presented by the aqueous systems. In Figure 15 we plot the data for IL systems having NTf 2 anion (Andreatta et al, 2009;Andreatta et al, 2010), while in Figure 16 systems with alkyl imidazolium with other kind of anions as OTf (Vercher & Rodriguez, 2010), PF 6 and MS (Pereiro et al, 2007). The behaviour is very similar for all systems.…”

Density, viscosity and refractive index prediction of binary and ternary mixtures systems of ionic liquid

“…They are nearly non-volatile, non-flammable and, thermally/electrically stable 3,4 . Because of their interesting properties ionic liquids are gaining popularity as an alternative to traditional volatile organic solvents (VOCs) 1,3,5 and they are often called green solvents 1 . Therefore they are involved in many investigations in different areas such as chemistry and biotechnology 3 .…”

“…Therefore they are involved in many investigations in different areas such as chemistry and biotechnology 3 . Research on their chemical, physical and thermodynamic properties becomes necessary in order to select the most suitable ionic liquid for a particular application 5,6 . In most cases, ionic liquids are composed of an organic cation and an inorganic, polyatomic inorganic anion 7 .…”

“…In most cases, ionic liquids are composed of an organic cation and an inorganic, polyatomic inorganic anion 7 . Doing simple changes in the cation and anion combinations or by modifying the chemical structures of the constituent ions, it is possible to develop a huge number or new ionic liquid 3,6,7 , for this reason ionic liquids are called designer solvents 5 . This feature allows to synthesize new ionic liquids to provide a desired density, viscosity, melting point, etc., in order to suit the requirements of a particular process or specific applications 8,9 , we could say that is a simple process 10 but given the large number of potential new ionic liquids that could be generated, their physicochemical characterization could be complicated because measurements and experiments are not always cheap and easy 10 , it is necessary therefore, the application of predictive models, as presented in this paper, to estimate the properties of different ionic liquids are important to minimize costs, reagents and labour.…”