Thermodynamic topological analysis of extractive distillation of maximum boiling azeotropes

Weifeng Shen (1) , H. Benyounes (2) , J. Song (3)

1 LGC - Laboratoire de Génie Chimique
2 USTO MB - Université des sciences et de la Technologie d'Oran Mohamed Boudiaf [Oran]
3 CAS - Chinese Academy of Sciences [Beijing]

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).

Mots clés: Extractive distillation; Maximum boiling azeotrope; Azeotropic mixtures; Topological analysis; Residue curve map

Domaines: Génie chimique; Génie des procédés

Weifeng Shen, H. Benyounes, J. Song. Thermodynamic topological analysis of extractive distillation of maximum boiling azeotropes. Brazilian Journal of Chemical Engineering, 2015, 32 (4), pp.957-966. ⟨10.1590/0104-6632.20150324s20140023⟩. ⟨hal-02134877⟩