Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Solubility of high-value compounds in environmentally friendly solvents-liquid poly(ethylene glycol) and ionic liquids
T2 - experimental study and thermodynamic analysis
AU - Calado, Marta S.
AU - Branco, Adriana S. H.
AU - Najdanovic-Visak, Vesna
AU - Visak, Zoran P.
PY - 2014/3
Y1 - 2014/3
N2 - In this work the (solid + liquid) equilibria (SLE) of the solution of sustainable solvents with five high-value compounds, thymol, ferulic acid, vanillic acid, caffeic acid and caffeine, was investigated. The sustainable solvents studied were liquid poly(ethylene glycol) of average molecular mass 200 and 400 – (PEG200 and PEG400), respectively as well as imidazolium ionic liquids with bistriflamide and triflate anions ([C4mim][NTf2] and [C4mim][OTf]). The obtained SLE data were correlated using the semi-empirical equation proposed by Grant. The activity coefficients of the studied solutes were calculated. Based on these correlations and calculations as well as on the thermo-physical properties of the pure constituents, the SLE behavior of the studied solutions was analyzed and discussed.
AB - In this work the (solid + liquid) equilibria (SLE) of the solution of sustainable solvents with five high-value compounds, thymol, ferulic acid, vanillic acid, caffeic acid and caffeine, was investigated. The sustainable solvents studied were liquid poly(ethylene glycol) of average molecular mass 200 and 400 – (PEG200 and PEG400), respectively as well as imidazolium ionic liquids with bistriflamide and triflate anions ([C4mim][NTf2] and [C4mim][OTf]). The obtained SLE data were correlated using the semi-empirical equation proposed by Grant. The activity coefficients of the studied solutes were calculated. Based on these correlations and calculations as well as on the thermo-physical properties of the pure constituents, the SLE behavior of the studied solutions was analyzed and discussed.
KW - Thymol
KW - Ferulic acid
KW - Vanillic acid
KW - Caffeic acid and caffeine
U2 - 10.1016/j.jct.2013.10.036
DO - 10.1016/j.jct.2013.10.036
M3 - Journal article
VL - 70
SP - 154
EP - 159
JO - Journal of Chemical Thermodynamics
JF - Journal of Chemical Thermodynamics
SN - 0021-9614
ER -