Some aspects of topological approach for the analysis of phase transitions in simple distillation and pervaporation (PV) processes and its application for non-reactive and reactive systems are presented. Singularities of residue curve maps including vicinity of azeotropic points both for simple distillation and for PV followed by the general topological and thermodynamic analysis of phase diagrams are compared. In the case of reacting systems, the complexity of the analysis of PV process increases. For the small fluxes (usual for the PV) and fast reactions, the feed solution can be considered as a system in a chemically equilibrium state. The residue curve map of reactive PV process may be presented with the use of transformed concentration variables. In the case of low reaction rate, additional parameters similar to Damköhler number could be considered. Some examples both for reactive and non-reactive systems are given based on experimental data. This is an abstract of a paper presented at the 18th International Congress of Chemical Process Engineering (Praque, Czech Republic 8/24-28/2008).