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Dynamics of a five stages extraction cascade with solvent recycle
Author

Housam Binous
Organization: KFUPM
Department: Chemical Engineering
URL: http://sites.google.com/site/homepageofdrhousambinous/
Revision date

2004-10-20
Description

Stagewise operation with two different recycle types are considered. The five stages extraction cascade is solved using Mathematica. 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 numerically with Mathematica, 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 lamda in the notebook named lelli2). For very large values of h, we get the usual cascade without recycle problem. For small values of h and large times, we get solvent saturation.
Subjects

*Engineering > Chemical Engineering
*Science > Chemistry
Keywords

Liquid-liquid extraction with recycle, equilibrium staged operations, chemical, engineering dynamics
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lelli2.nb (134.9 KB) - Mathematica Notebook