Middle-vessel batch distillation

Figure 3.10 Middle vessel batch distillation process (adapted from Barton [43]).

In a Middle Vessel Batch Distillation Column (MVC) (Figure 2.2) the separation section is divided, as in the usual continuous distillation column, into rectifying and stripping sections, with a feed tray in the middle. The essential features of this type of column are ... 

Figure 2.2. Middle Vessel Batch Distillation Column (MVC)...

Fig. 5.2-39 Batch distillation configurations (A) regular batch distillation, (B) inverse batch distillation, and (C) middle vessel batch distillation...

Weiyang Cheong and Paul I. Barton. Azeotropic distillation in a middle vessel batch column. 1. model formulation and linear separation boundaries. Ind. Eng. Chem. Res., 38 1504-1530, 1999. 

Robinson and Gilliland (1950), Abrams et al. (1987) and Hasebe et al. (1992, 1995), Sorensen and Skogestad (1996a), Barolo et al. (1998), Furlonge et al. (1999) reported simulation results using inverted, batch distillation columns with middle vessel and multi-effect batch distillation, respectively. Mujtaba (1997) simulated batch distillation operation using a continuous distillation model. 

Inverted, middle vessel and multivessel batch distillation column operations... 

Sprensen and Skogestad (1996) compared the operation of regular (fig. la) and inverted (fig. lb) batch distillation columns for the separation of binary mixtures. In a later work Sprensen and Prenzler (1997) investigated the cyclic, or closed operation for the separation of binary mixtures. Warter et al. (2002) presented simulations and experimental results for the separation of ternary mixtures in the middle vessel column (fig. Ic). The cyclic operation was applied also in this case. Multicomponent mixtures can be separated in the multi-vessel distillation column. This might also be operated in closed operation (Wittgens et al. 1996). 

In this paper we introduce a novel process for the separation of ternary mixtures via cyclic operation of a batch distillation column provided with a side withdrawal (fig. Id). This consists of a distillation column equipped with sump and distillate vessels, to which the charge is loaded at the beginning of the process, and a liquid withdrawal section placed in the middle of the column. 

Fig. I Different column types -(a) regular (b) inverted(c) middle vessel and(d) novel cyclic batch distillation column with side withdrawal.

Warter, M., Demicoli, D. Stichlmair, J., 2002, Batch distillation of zeotropic mixtures in a column with a middle vessel. Comp. Aided Chem. Engng., Vol. 10,385-390. 

Operational fractions of batch extractive distillation in a middle vessel column [1]. 

Arthur G. Davidyan, Valerii N. Kiva, George A. Meski, and Manfred Morari. Batch distillation column with a middle vessel. Chem. Eng. Sci., 49(18) 3033-3051, 1994. 

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