As in the case of simple distillation, a fixed quantity of liquid is originally charged to the batch still. During distillation, the vapour passes upward through the column. The whole column is an enriching section. The vapour is condensed into liquid at the top of the column. Part of the liquid is returned to the column as reflux, and the remainder withdrawn as distillate. Nothing is added or withdrawn from the still until the run is completed. As distillation progress, the MVC in the batch still decreases.
In principle, the alternative setup as shown in the Figure is also feasible. Here the vessel is located at the top of the column that is operated as a stripping column. Such a set-up is often known as the inverted batch distillation or the batch stripper. During operation, the LVC are primarily separated from the system. The liquid is the still depletes in LVC and enriches in MVC.
As in the case of simple distillation, a fixed quantity of liquid is originally charged to the batch still. During distillation, the vapour passes upward through the column. The whole column is an enriching section. The vapour is condensed into liquid at the top of the column. Part of the liquid is returned to the column as reflux, and the remainder withdrawn as distillate. Nothing is added or withdrawn from the still until the run is completed. As distillation progress, the MVC in the batch still decreases.In principle, the alternative setup as shown in the Figure is also feasible. Here the vessel is located at the top of the column that is operated as a stripping column. Such a set-up is often known as the inverted batch distillation or the batch stripper. During operation, the LVC are primarily separated from the system. The liquid is the still depletes in LVC and enriches in MVC.
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