Liquid-liquid equilibrium (LLE) data were measured for the aqueous mixtures of phosphoric acid with 1-
pentanol and 1-heptanol at T=(298.2, 308.2, and 318.2) K and atmospheric pressure. These ternary systems exhibit
as Treybal's type-1 liquid-liquid phase behavior. The reliability of the experimental tie-lines was checked
using the Othmer-Tobias and Hand correlation equations. The activity coefficient models of NRTL and
UNIQUACwere applied to fit the experimental tie lines. For thesemodels, values of the binary interaction parameters
between each pair of components in the studied systems were obtained. Experimental distribution coefficients
and selectivity factors for the immiscibility regions were determined.
کلید واژگان :
Liquid-liquid equilibrium Phosphoric acid NRTL model UNIQUAC model
