Evolution of ternary azeotropes caused by changes in external parameters

The conditions of realization of each of the three types of evolution of te rnary azeotropes during changes in external parameters were established. It was demonstrated that the concentration regions of location of ternary aze otropes are limited by lines of equal values of the activity coefficients o f the components and unit activity coefficient lines. It was established th at these boundaries can be transgressed by the composition of the azeotrope during its evolution in the presence of Bancroft points of required types.