The ternary isobaric liquid-liquid-vapour and liquid-vapour equilibrium can be very complex and may present a wide variety of three-dimensional representations, which sometimes are not very well understood. This paper presents several examples of possible complex spatial behaviours with different kind of azeotropes. These examples have been selected to clarify the expected projections deduced from the binaries and to help in the understanding of these type of equilibrium as well as in the experimental data determination and interpretation.Universidad de Alicant
