In this work an aggregated model for homogeneous distillation is proposed. The aggregated model can be considered only an approximation to the actual process, but the results shown that is accurate enough for being useful in the initial stages of the design and is computational convenient. We also introduce a systematic procedure for creating superstructures for homogeneous azeotropic systems. For this we need to known the characteristics of the system, that include the composition and nature of the azeotropes, distillation boundaries (if any) and distillation curves. With ail this information we can determine qualitatively which separations are possible and then formulate a superstructure that includes all the possible separations.