The aim of this paper is to show how distillation boundaries can determined. The method developed in this paper can be applied to azeotropic, heteroazeotropic or reactive distillation Our article is composed of three principal sections, each describing an essential step enabling us to built the distillation maps: determination of the azeotropes, as a function of the temperature and composition, and their nature; obtention and drawing of the residual curves, determination of distillation boundaries. To conclude this paper, some illustrative examples are given.