Batch extractive distillation of maximal azeotrope with middle boiling entrainer

A preliminary study: Distillation of isopropanol–water mixture using fixed adsorptive distillation method

“…However, pervaporation itself still encounters some challenges in particular to the membrane productivity and membrane stability [6]. In addition, investigations of general azeotropic systems have also been studied by some researchers by applying the currently developed methods, such as azeotropic distillation [7], extractive distillation [7][8][9][10], reactive distillation [11,12], and adsorptive distillation slurry system [13,14]. In principle, those common methods require other specific components to be mixed directly together with the solution that will be separated.…”

Thermodynamic Topological Analysis of Extractive Distillation of Maximum Boiling Azeotropes

“…Theoretically, any candidate entrainer satisfying the feasibility and optimal criteria can be used, no matter whether it is a heavy, light, or intermediate entrainer. Literature studies on intermediate entrainers or light entrainers validate this assumption (Lelkes et al, 2002;Lang et al, 1999;RodriguezDonis et al, 2012;Shen, 2012;Shen and Gerbaud, 2013b;Laroche et al, 1992). Based on the calculation of the still path and possible composition profiles of the column sections, Lang et al (2000a, b) extended the feasibility of extractive distillation in a batch rectifier for the investigation of the separation of maximum azeotropes, Rodriguez-Donis et al (2009a, 2012a studied the maximum azeotropic mixture separation.…”

“…The separation of the maximum-boiling mixture acetone/chloroform with the proposed solvents exhibit class 1.0-1a, 1.0-2, and 3.1-4. The thermodynamic insights published in previous work (Shen et al, 2013a;Benyounes et al, 2014;Benyahia et al, 2014;Lelkes et al, 2002;Lang et al, 1999;Rodriguez-Donis et al, 2012;Shen et al, Gerbaud, 2013b) and validated for the 1.0-1a and 1.0-2 ternary mixture class are applied here, and the general feasibility criterion 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).…”

Operation and control of batch extractive distillation for the separation of mixtures with minimum-boiling azeotrope

“…Lelkes et al (2002), instead of using a heavy entrainer, showed that an intermediate-boiling entrainer can also be used for the separation. The chemical system studied was the separation of chloroform and ethyl acetate using 2-chlorobutane as entrainer.…”