Measurements of activity coefficients at infinite dilution for organic solutes and water in the ionic liquid 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate ([BMPYR][FAP])

2013

a b s t r a c t This work presents new data of activity coefficients at infinite dilution, c 1 of different organic solutes and water in the 1-(2-hydroxyethyl)-3-methylimidazolium trifluorotris(perfluoroethyl)phosphate, [C 2 OHmim][FAP] ionic liquid. Values of c 1 were determined for 65 organic solutes, including alkanes, alkenes, alkynes, cycloalkanes, aromatic hydrocarbons, alcohols, thiophene, ethers, ketones, esters, 1-nitropropane, aldehydes, acetonitrile and water by inverse gas chromatography within the temperature range from (318.15 to 368.15) K. The basic thermodynamic functions, such as partial molar excess Gibbs energies, DG E;1 1 , enthalpies, DH E;1 1 and entropies, DS E;1 1 at infinite dilution were calculated from the experimental c 1 values obtained over the temperature range. Additionally the gas-liquid partition coefficients, K L were determined. Experimental values of gas-liquid partition coefficients were used to determine the coefficients in the Abraham solvation parameter model (LFER). Results are compared to previously investigated ionic liquids with the same [C 2 OHmim] + cation and [FAP] À anion. The selectivity and capacity at infinite dilution for alkanes/thiophene extraction problems were calculated from experimental c 1 values to verify the possibility of investigated ionic liquid as an entrainer in liquid-liquid extraction.

Section: Ionic Liquidmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Activity coefficients at infinite dilution and physicochemical properties for organic solutes and water in the ionic liquid 1-(2-hydroxyethyl)-3-methylimidazolium trifluorotris(perfluoroethyl)phosphate

2013

“…The different situation is for n-alkanes with low K L , which means that these types of solutes were obtained for alcohols and water due to breaking of hydrogen bonds during the dissolution process. [7,12]; [emim] + 1-ethyl-3-methyl-imidazolium [4,13]; [hmim] + 1-hexyl-3-methyl-imidazolium [5,14]; [bmPYR] + 1-butyl-1-methylpyrrolidinium [6,15]; and [P 6,6,6,14 ] + trihexyl-tetradecyl-phosphonium [3,16]. The selectivities of common industry solvents, namely N-methylpyrrolidone (NMP) [17] and sulfolane [18] are also presented.…”

Section: Theoretical Basismentioning

confidence: 99%

“…In turn, the research of trifluorotris(perfluoroethyl)phosphate anion [FAP] À based ILs indicate high capacities[3][4][5][6]. A combination of cation containing oxygen in structure and [FAP] À anion should reveal both properties of extractant on good level.…”

mentioning

confidence: 99%

Activity coefficients at infinite dilution and physicochemical properties for organic solutes and water in the ionic liquid 4-(2-methoxyethyl)-4-methylmorpholinium trifluorotris(perfluoroethyl)phosphate

2012

Keywords: Activity coefficient at infinite dilution Ionic liquid 4-(2-Methoxyethyl)-4-methylmorpholinium trifluorotris(perfluoroethyl)phosphate [COC 2 mMOR][FAP] Selectivity Extraction LFER a b s t r a c t This paper presents new data on activity coefficients at infinite dilution, c 1 for 62 different solutes: alkanes, alkenes, alkynes, cycloalkanes, aromatic hydrocarbons, alcohols, thiophene, ethers, ketones, and water in the ionic liquid 4-(2-methoxyethyl)-4-methylmorpholinium trifluorotris(perfluoroethyl)phosphate, [COC 2 mMOR][FAP]. The data were determined by inverse gas chromatography at six temperatures from T = 318.15 K to T = 368.15 K. These values were compared with ionic liquid based on the same cation and bis(trifluoromethylsulfonyl)-amide anion, [COC 2 mMOR][NTf 2 ]. Additionally the partial molar excess Gibbs free energies DG E;1 1 , enthalpies DH E;1 1 , and entropies DS E;1 1 at infinite dilution were calculated from the experimental c 1 values obtained over the temperatures range. The selectivities and capacities at infinite dilution for hexane/benzene, cyclohexane/benzene, and heptane/thiophene extraction problems were calculated from the c 1 to verify the possibility of investigated ionic liquid as an entrainer in liquid-liquid extraction and desulphurization of fuels. Obtained values were compared with literature data of other ionic liquids based on trifluorotris(perfluoroethyl)phosphate and bis(trifluoromethylsulfonyl)-amide anions and industrial solvents: NMP and sulfolane. Also the Abraham solvation parameter model was used for evaluation of the solvation characteristic of the ionic liquid. Linear free energy relationship (LFER) system constants as a function of temperature were calculated.

“…Morpholinium cation, comparing to piperidinium, interacts more strongly with polar solutes due to polar oxygen in the cyclic structure, therefore c 1 13 values for this cation are lower for alcohols, water, esters, ketones, aldehydes (butanal), acetonitrile, and 1,4-dioxane. [5], trihexyl-tetradecyl-phosphonium, [P 6,6,6,14 ] + [6].…”

Section: Resultsmentioning

confidence: 99%

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

2013

Keywords:Activity coefficient at infinite dilution Ionic liquid 1-(2-Methoxyethyl)-1-methylpiperidinium trifluorotris (perfluoroethyl)phosphate [COC 2 mPIP][FAP] Selectivity Extraction LFER a b s t r a c tThis work is continuation of our systematic study of activity coefficients at infinite dilution, c 1 of different organic solutes and water in the ionic liquids. New data of c 1 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, DG E;1 1 , enthalpies, DH E;1 1 and entropies, DS E;1 1 at infinite dilution were calculated from the experimental c 1 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 c 1 values to verify the possibility of investigated ionic liquid as an entrainer in liquid-liquid extraction.