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In this work, Aspen Plus simulator was used to propose an entrainer selection procedure based on the criteria: 1) A good entrainer is a component that eliminates the azeotrope easily (i.e. even when it’s concentration is small). 2) A component that yields relative volatilities αAB between the two azeotrope constituents more different from unity in the whole concentration range (0÷1). | Entrainer selection for separation of azeotropic mixtures by distillation methods