Abstract
Modelling and simulation of a counter-current liquid-liquid extraction column for removal of benzene from raw hexane using sulfolanc as the solvent is studied. The short-cut method (Smith and Brinkley, 1960; Henley and Seader, 1981) and the rigorous method of isothermal sum rates (Tsuboka and Katayama, 1976) with the UNIFAC method for prediction of activity coefficients are applied to evaluate the composition of benzene in the raffinate. The predictions are compared with pilot plant experimental data on a counter-current sieve-tray extractor for different solvent-to-feed ratios and different number of stages.
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