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Feasibility of extractive distillation process variants in batch rectifier column

Stéger, Csaba and Varga, Viktoria and Horvath, Laszlo and Rev, Endre and Fonyo, Zsolt and Meyer, Michel and Lelkes, Zoltan Feasibility of extractive distillation process variants in batch rectifier column. (2005) Chemical Engineering and Processing, vol. 4 (n° 11). 1237 -1256. ISSN 0255-2701

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Official URL: http://dx.doi.org/10.1016/j.cep.2005.02.008

Abstract

A systematic comparison is presented about the separation tasks of azeotropic and close-boiling mixtures applying batch extractive distillation (BED) in rectifier. All the eight possible mixture types with at most a single azeotrope (minimum and maximum boiling azeotropes with heavy, light, and intermediate boiling entrainers; and close boiling mixtures with heavy and light entrainers) are compared. The main results of the feasibility studies on the hitherto unpublished cases are presented. All the cases are feasible in batch rectifier, applying BED. The operation steps are determined by the relative position of the azeotropic composition and entrainer in bubble point ranking. The main limiting parameters (F/V, N, Epremix) are also determined by the mentioned relative position; only the existence of maximum number of stages in the rectifying section is determined by the type of the azeotrope. Use of residue curves maps (RCMs) for predicting feasibility is not generally satisfactory, but profiles maps can be used instead. Studying only the total reflux case can be misleading, and should be treated with great care. The theoretical results of separation variants applying intermediate boiling entrainer were proved experimentally.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Chemical Engineering and Processing website : http://www.sciencedirect.com/science/journal/02552701
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Budapest University of Technology and Economics - BME (HUNGARY)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Hungarian Academy of Sciences - HAS (HUNGARY)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Hélène Dubernard

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