Decantation overflow pumping

Our aim is to estimate the duration of the processes and the amount of products. A simplified model was applied based on the following assumptions maximal separation, negligible hold-up on the trays and in the decanter, constant molar overflow, the flow rates do not vary with the time, one-phase liquid streams leave the decanter, negligible duration of pumping between the operation steps (BR), no entrainer loss (in the case of the ternary mixture). The total and component material balances for one column and the decanter are analytically solved. For the DCS we assume that both products reach the prescribed purity at the same time, that is, the duration is nrinimal. The process time (x) for both configurations and for the DCS the optimal division (v ) of total vapour flow rate (V) between the two reboilers and that of the charge (Ub /Uch) are shown. 

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