Liquid-liquid extraction with recycle

A five stage extraction cascade with recycle container solved using Simulink.

Stagewise operation with two different recycle types are considered. The five stages extraction cascade is solved using Simulink. A tank holding the solvent is connected to the extraction cascade. This solvent container is either a perfectly mixed tank or a plug flow tube. This problem with a perfectly mixed tank was solved analytically by Ugo Lelli (Annali di Chimica, 56, 1966, pages 113-125). In addition to solving this problem with Simulink, we extend Lelli's work to the case of a plug flow container. Different values of the solvent container volume are tested (parameter h in the program). We also vary the equilibrium coefficient (parameter l in the program).