The
existence of two ternary azeotropes in a ternary system was
experimentally confirmed for the first time. The boiling point and
the composition of azeotropes benzene + water, perfluorobenzene +
water, and benzene + perfluorobenzene + water (with a minimum boiling
temperature) as well as the boiling point of the ternary azeotrope
of the saddle type were measured at 101 kPa using distillation analysis,
ebulliometric titration, and gas chromatography. The parameters of
the NRTL-RK model were selected from the AspenPlus V.10.0 database,
allowing an adequate description of the phase equilibrium in the system
studied. Possible evolution of the VLE diagram under pressure change
was discussed.
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