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Thermodynamic Insights on the Feasibility of Homogeneous Batch Extractive Distillation. 3. Azeotropic Mixtures with Light Boiling Entrainer

Rodriguez-Donis, Ivonne and Gerbaud, Vincent and Joulia, Xavier Thermodynamic Insights on the Feasibility of Homogeneous Batch Extractive Distillation. 3. Azeotropic Mixtures with Light Boiling Entrainer. (2012) Industrial & Engineering Chemistry Research, vol. 51 (n° 2). pp.4643-4660. ISSN 0888-5885

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Official URL: http://dx.doi.org/10.1021/ie201942b

Abstract

This article shows how knowledge of the location of univolatility lines and residue curve analysis helps in assessing the feasibility of extractive distillation of minimum-boiling (minT) or maximum-boiling (maxT) azeotropic mixtures or low-relative volatility (low-α) mixtures (A-B) by using a light-boiling entrainer (E), in accordance with the general feasibility criterion of Rodriguez-Donis et al. [Ind. Eng. Chem. Res. 2009, 48 (7), 3544-3559]. Considering all possible locations of the univolatility line αAB, three minT azeotropic mixtures with a light entrainer (1.0-2 class), namely, ethanol-water with methanol, ethanol-toluene with acetone, and methyl ethyl ketone-benzene with acetone; three maxT azeotropic mixtures with a light entrainer (1.0-1a class), namely, water-ethylenediamine with methanol, acetone-chloroform with dichlomethane, and propanoic acid-dimethyl formamide withmethyl isobutyl ketone; and one low-α mixture with a light entrainer (0.0-1 class), namely, ethyl acetate-benzene with acetone, were studied in a stripping extractive column. For the 1.0-2 class, both A and B can be recovered as the bottom product, depending on the location of αAB = 1, which sets limiting values for the entrainer feed flow rate FE/LT for one of the product. In addition, the feasible region of the extractive distillation process is larger than for the azeotropic distillation process. For the 1.0-1a class, the product is either A or B, depending on the location of αAB = 1, which sets a minimum value of (FE/LT)min for one of the product. For the 0.0-1 class, feasibility depends on the existence αAB = 1. When it does not exist, B is the unique possible product. When it does, both A and B are products, with B below a maximum value of (FE/LT)max,B and A above a minimum value (FE/LT)min,A

Item Type:Article
Additional Information:The definitive version is available at http://pubs.acs.org/ The original PDF of the article can be found at Industrial & Engineering Chemistry Research website : http://pubs.acs.org/journal/iecred
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Instituto Superior de Tecnologias y Ciencias Aplicadas - InSTEC (CUBA)
Laboratory name:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Procédé et Système Industriels - PSI - Analyse Fonctionnelle des Procédés
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Deposited By: Vincent GERBAUD
Deposited On:16 Oct 2012 14:03

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