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Jelena Vuksanović,Mirjana Lj. Kijevčanin,Ivona R. Radović 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.7
The ability of binary deep eutectic solvent choline chloride+1,2-propanediol (DES1; 1 : 3 mole ratio) and ternary deep eutectic solvent choline chloride+1,2-propanediol+water (DES2; 1 : 3 : 3 mole ratio) for breaking the azeotropes hexane/heptane+ethanol by means of liquid-liquid extraction was evaluated. Liquid-liquid equilibrium experiments were performed at 298.15 K, at atmospheric pressure, and data were correlated by NRTL and UNIQUAC models. Thermodynamic properties (density, viscosity, refractive index and speed of sound) of DES1 and DES2 were determined in temperature range from 288.15K to 333.15K and at atmospheric pressure. Extraction ability of the investigated eutectics yielded promising results in comparison with conventional solvents. Besides a high selectivity towards ethanol, an advantage of DES2 is its lower viscosity and higher distribution ratio values, which is an important aspect for a potential industrial application. Another advantage of both investigated eutectics is their easy and high recoverability from the extract layer based on their negligible vapor pressure.
Bojan D. Djordjevi?,Slobodan P. ?erbanovi?,Ivona R. Grguri?,Mirjana Lj. Kijev?anin,Aleksandar ?. Tasi? 한국화학공학회 2004 Korean Journal of Chemical Engineering Vol.21 No.4
A comparison of the performances of two diferent approaches of cubic equations of state models, basedon a classical van der Wals and mixing rules incorporating the GEequation, was carried out for corelation ofVapor-Liquid Equilibria (VLE), HEand cPE data alone, and simultaneous correlation of VLE+HE, VLE+cPE, HE+cPE andVLE+HE+cPE data for the diethers (1,4-dioxane or 1,3-dioxolane) with n-alkane systems. For all calculations thePeng-Robinson-Stryjek-Vera cubic equation of state (PRSV CEOS) was used. A family of mixing rules for thePRSV CEOS based on the Modified van der Wals one-fluid mixing rule (MvdW1) and two well-known CEOS/GEmixing rules (MHV1 and MHV2), was considered. The NRTL equation, as the GEmodel with linear or reciprocal tem-perature dependent parameters, was incorporated in the CEOS/GEmodels. The results obtained by the CEOS/GEmodelsexhibit significant improvement in comparison to the MvdW1 models.