Mixing properties of (n-alkanes or esters) + olive oil at different temperatures

Abstract

In the scope of investigating phase equilibria and thermodynamic magnitudes related to equipment design and optimization for edible oil industry, this paper reports refractive index on mixing and ultrasonic velocity of binary systems enclosing a collection of n-alkanes (n-hexane, n-heptane, n-octane, n-nonane), or esters (ethyl acetate, vinyl acetate, propyl acetate, isopropyl acetate, butyl acetate) + olive oil at temperatures from 288.15-298.15 K. From these physical properties, the corresponding derived magnitudes, changes of refractive indices on mixing and change of isentropic compressibilities were computed, being fitted by a modified Redlich-Kister polynomial. Due to the fact of industrial processes design to be strongly computer oriented, consideration was also given to quantify how accurate different theoretical estimation models work. The validity of estimation of these thermodynamic properties was tested by different models, which were selected attending to ease of use, wide range of application and accuracy. From the obtained results we can conclude that an adequate agreement between experimental and computed data, both in magnitude or sign in all range of compositions, was observed.

Keywords

• Refractive index on mixing,isentropic compressibility,n-alkane,ester,olive oil,theoretical model

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