EQBACK - Multistage Extractor with Backmixing

The full model is described in Sec. 3.3.1.5 and consists of a countercurrent stagewise extraction cascade with backmixing in both phases. 

5 Simulation Tools and Examples of Chemical Engineering Processes 

Allowing for the backmixing flow contributions, the continuity equations for any stage n are 

The model equations are also often written in terms of backmixing factors, where, 

Special balances also apply to the end sections owing to the absence of backflow, exterior to the column. 

Special balances for the end sections must be written to account for the absence of backflow. 

Five stage countercurrent extraction cascade with backmixing Equilibrium stage model 

Xi=Extraction phase concentration at stage i Yi=Concentration in solvent at stage i Qi=Mass flow from extraction phase to solvent 

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EQBACK - Multistage Extractor with Backmixing System... 

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