Feasibility of extractive distillation process variants in batch rectifier column

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

“…The feasibility of batch extractive distillation has been studied by the following researchers in literature: Ahmad et al (1998), Bernot et al (1991), Lelkes et al (1998a), Safrit et al (1995), Safrit and Westerberg (1997), and Steger et al (2005). In the feasibility studies, residue curve maps (RCM) and distillation regions are often used to identify the feasible products and the sequencing of the batch distillation systems.…”

Conceptual Design of Non-Ideal Mixture Separation With Light Entrainers

“…For separating azeotropic mixtures, besides the conventional batch rectifier (Lelkes et al, 1998a;Stéger et al, 2005), both batch stripper (Varga, 2006) and middle vessel columns (Davidyan et al, 1994) have also been suggested and discussed in the literature, even though the use of a light entrainer would be recommend for use at a batch stripper, since the product expected to be a heavy boiler could still be removed from the boiler (Varga et al, 2006). Extractive distillation can be operated either in a batch or in continuous mode.…”

Heterogeneous extractive batch distillation of chloroform–methanol–water: Feasibility and experiments

“…Process operation efficiency also depends on the entrainer due to the existence of minimum values for the entrainer flowrate and the reflux ratio. They are both related to the topology of the extractive profile maps, in particular to the univolatility line α A,B =1 and the product composition x P at its intersection point with the edge E -distillate product (A or B) (Knapp and Doherty, 1994;Hilmen, 2000;Steger et al, 2005;Frits et al, 2006).…”

“…Process feasibility has been evaluated for continuous (Widagdo and Seader, 1996) and batch (Rodriguez-Donis et al, 2001a,b, Skouras et al 2005 azeotropic distillation for all significant Serafimov's classes and led to major industrial applications in the continuous operation mode. For homogeneous extractive distillation, class 1.0-1a has been thoroughly investigated for a continuous column (Knapp and Doherty, 1994;Hilmen, 2000;Brüggemann and Marquardt, 2004) and only 0.0-1; 1.0-1a; 1.0-1b and 1.0-2 classes for a batch rectifier or stripper column (Steger et al, 2005, Varga, 2006. For heterogeneous batch extractive distillation, only 2.0-2b class has been studied in detail (Rodriguez-Donis et al, 2003a;Varga et al, 2005).…”

“…It encompasses Serafimov's structures 0.0-1; 1.0-1a; 1.0-1b and 1.0-2, representing approximately one third of occurring azeotropic mixtures (Kiva et al, 2003). Processes and operating parameters for batch homogeneous extractive distillation were reviewed in rectifying (Steger et al, 2005) and stripping column (Varga, 2006). For heterogeneous entrainers, feasibility analysis was first proposed by Rodriguez-Donis et al (2003a) through the separation of water -acetonitrile by using butyl acetate or n-hexylamine, both cases matching Serafimov's class 2.0-2b.…”