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Thermodynamic topological analysis of extractive distillation of maximum boiling azeotropes

Abstract : This paper provides a feasibility study of azeotropic mixture separation based on a topological analysis combining thermodynamic knowledge of residue curve maps, univolatility and unidistribution curves, and extractive profiles. Thermodynamic topological features related to process operations for typical ternary diagram classes 1.0-2 are, for the first time, discussed. Separating acetone/chloroform is presented as an illustrative example; different entrainers are investigated: several heavy ones, a light one, and water, covering the Serafimov classes 1.0-2, 1.0-1a and 3.1-4, respectively. The general feasibility criterion that was previously established for ternary mixtures including only one azeotrope (1.0-1a or 1.0-2) is now, for the first time, extended to that including three azeotropes (class 3.1–4).
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Weifeng Shen, H. Benyounes, J. Song. Thermodynamic topological analysis of extractive distillation of maximum boiling azeotropes. Brazilian Journal of Chemical Engineering, Brazilian Society of Chemical Engineering, 2015, 32 (4), pp.957-966. ⟨10.1590/0104-6632.20150324s20140023⟩. ⟨hal-02134877⟩



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