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Información tecnológica

versión On-line ISSN 0718-0764

Resumen

PAEZ, Manuel S; MIRANDA, Jesús A  y  TORRES, Francisco J. Ionic Interaction Parameters of Concentrated Aqueous Solutions of the Ionic Liquid 1-Ethyl-3-Methyl-Imidazolium Trifluoromethanesulfonate at Various Temperatures. Inf. tecnol. [online]. 2014, vol.25, n.6, pp.77-84. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642014000600010.

Densities of concentrated aqueous solutions of the binary mixture water + 1-ethyl-3-methyl-imidazolium trifluoromethanesulfonate ([Emim+][CF3SO3-]) were experimentally determined at temperatures from 283.15 to 318.15 K, using an Anton Paar model DMA 5000 vibrating tube densitometer. Apparent molar volumes were calculated and correlated with the Pitzer-Simomson equation using as reference state the pure ionic liquid and the solute at infinite dilution and with the Pitzer-Simomson-Clegg and Simplified-Pitzer-Simomson-Clegg models whose reference state is the pure ionic liquid. The correlation coefficient was positive and close to one, indicating that there is a direct correlation, between the experimental and calculated apparent molar volumes for all cases. However, the correlation results show that the apparent molar volumes fit better to the Pitzer-Simomson equation.

Palabras clave : density; 1-ethyl-3-methyl-imidazolium trifluoromethanesulfonate; apparent molar volume; Pitzer-Simonson equation; Pitzer-Simomson-Clegg equation.

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