Abstract
Liquid-liquid equilibria data for a system of n-heptane, acetonitrile (10 wt % water) and fatty acids (oleic, linoleic, linolenic) were experimentally investigated. A correlation method was proposed by taking account of association of fatty acids in each phase. In this correlation, the concentration of the i-component fatty acid in the acetonitrile phase, yi, is related to the concentration of solute in the pure i-component system,
y°i, at the same concentration of total solutes in the n-heptane phase, χ, and the solvent-free mole fraction of the i-component in the n-heptane phase, Xi, as follows.
yi=y°i Xi
The experimental data were well correlated by this equation. In addition, y°i is given as a function of χ for each component mentioned above.
