Activity coefficients at infinite dilution and physicochemical properties for organic solutes and water in the ionic liquid 1-(2-methoxyethyl)-1-methylpiperidinium trifluorotris(perfluoroethyl)phosphate

作者：Marciniak Andrzej^*; Wlazlo Michal

来源：Journal of Chemical Thermodynamics, 2013, 57: 197-202.

DOI：10.1016/j.jct.2012.08.016

• Activity coefficient at infinite dilution
• Ionic liquid
• 1-(2-Methoxyethyl)-1-methylpiperidinium trifluorotris(perfluoroethyl)phosphate
• [COC(2)mPIP][FAP]
• Selectivity
• Extraction
• LFER

This work is continuation of our systematic study of activity coefficients at infinite dilution, gamma(infinity) of different organic solutes and water in the ionic liquids. New data of gamma(infinity) were determined for 62 solutes, including alkanes, alkenes, alkynes, cycloalkanes, aromatic hydrocarbons, alcohols, thiophene, ethers, ketones, esters, 1-nitropropane, butanal, acetonitrile, and water in the ionic liquid 1-(2-methoxyethyl)-1-methylpiperidinium trifluorotris(perfluoroethyl) phosphate by inverse gas chromatography at the temperature range from (318.15 to 368.15) K. The basic thermodynamic functions, namely partial molar excess Gibbs free energies, Delta G(1)(E,infinity), enthalpies, Delta H-1(E,infinity) and entropies, Delta S-1(E,infinity) 1 at infinite dilution were calculated from the experimental gamma(infinity) values obtained over the temperature range. Additionally the gas-liquid partition coefficients, K-L were determined. Results are compared to previously investigated ionic liquids with the same cations or anions. Values of the selectivity and capacity at infinite dilution for heptane/benzene, heptane/thiophene, and heptane/methanol extraction problems were calculated from experimental gamma(infinity) values to verify the possibility of investigated ionic liquid as an entrainer in liquid-liquid extraction.

• 出版日期2013-2