Densities and derived thermodynamic properties study for the binary mixtures of (۱-hexyl-۳-methylimidazoliumtetrafluoroborate + Aminopropanol, or isobutanol) at different temperature with application of the PFP theory

Study of ionic liquids (ILs) as solvents has received an increasing attention in the last years from fundamental and applied points of view [۱]. ILs has been used for reducing or eliminating the hazards from volatile organic solvents, solvents in analysis, synthesis, catalytic reactions, and separation processes. ILs have been accepted as “green-chemicals” which excited both the academia and the chemical industries due to their unique properties, and are liquids wide temperature range including room temperature. To design any process involving ILs on an industrial scale, it is necessary to know some thermo physical properties such as viscosity and density [۲,۳]. In this work, the thermodynamic properties for the binary mixtures of ۱-hexyl-۳-methylimidazoliumtetrafluoroborate ([C۶mim][BF۴]) with Aminopropanol (AP) and isobutanol have been investigated. We have measured densities,P for the binary mixture of {x۱[C۶mim][BF۴]+x۲Aminopropanol} and {x۱[C۶mim][BF۴]+x۲isobutanol} at atmospheric pressure in the temperature range of (۲۹۳.۱۵ to ۳۳۸.۱۵) K and in the entire composition range. The excess molar volumes, (...), partial molar volume,(...) , excess partial molar volume, (...), partial molar volume at infinite dilution, (...) apparent molar volume, (...) , the excess thermal expansion coefficients, , isothermal coefficient of excess molar enthalpy (....) , were calculated from the experimental values of densities . These data were correlated with the Redlich- Kister equation.

کلیدواژه ها:

Ionic liquids ، Excess molar properties ، Redlich- Kister correlation ، PFP theory