This
work presents the isobaric vapor–liquid equilibrium
(VLE) data for the binary mixture of butyl l-lactate + 1-butanol,
which was measured at 1 and 5 kPa. The measurements were carried out
in an equilibrium cell Fischer Labodest VLE 602D and binary mixtures
were analyzed by gas chromatography. The experimental data reported
were thermodynamically consistent according to the Van Ness and Fredenslund
tests. The equilibrium was correlated with the nonrandom two-liquid
(NRTL) and universal quasichemical (UNIQUAC) activity models with
asymmetrical parameters. Both activity models present a very approximated
correlation with experiments for being applied to the distillation
process design, especially, at low-pressure conditions.
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