Excess molar volumes and excess molar enthalpies of the binary mixtures of 1,2-dichloropropane with di- and triethylene glycol mono-alkyl ethers at T = 298.15 K
作者： Dipak Sen , Moon Gab Kim
DOI: 10.1016/J.FLUID.2009.06.018
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摘要: Abstract The excess molar volumes V m E and enthalpies H at T = 298.15 K atmospheric pressure for the binary systems of 1,2-dichloropropane (1,2-DCP) with di- triethylene glycol mono-alkyl ethers have been determined by measuring density heat flux, respectively. has measured using a digital vibrating-tube densimeter, whereas flux measurements carried out an isothermal calorimeter flow-mixing cell. diethylene are 2-(2-alkoxyethoxy)ethanols: mono-propyl ether (DEGMPE), mono-butyl (DEGMBE), 2-(2-(2-alkoxyethoxy)ethoxy)ethanols: mono-methyl (TEGMME), mono-ethyl (TEGMEE), ether(TEGMBE). It was found that both values mixtures negative over whole composition range except mixture very high mole fraction 1,2-DCP( x 1 ) in DEGMPE DEGMBE. In case 2-(2-(2-alkoxyethoxy)ethoxy)ethanols, continue to increase alkyl chain length these alkoxyethanols. minimum shift from −0.1939 cm 3 mol −1 −0.40 cm TEGMBE = 0.40–0.50. Also, shown ranging −472.9 J mol (DEGMBE) −800.5 J mol (TEGMBE) experimental results were fitted Redlich–Kister equation. data also three local-composition models (Wilson, NRTL, UNIQUAC). among models, NRTL equation provides most appropriate correlating result.
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