270002 Modified Correction-Factor Analysis for Recycled Membrane Extraction in Multipass Rectangular Modules
The membrane extraction techniques are in principle variants of conventional liquid-liquid extraction but various shortcomings of the later are overcome by the former as membrane extraction use none or very little organic solvents, high enrichment facts can be obtained and there are no problems with emulsions. Also, they can provide unsurpassed cleanup efficiency and high extraction selectivity. The modified correction-factor analysis for recycled membrane extraction in parallel-flow multipass rectangular devices was introduced in present study, where the expressions of mass-transfer rate and modified correction-factor charts thus derived, are explicit. Unlike those in the conventional correction-factor analysis, the results can be readily calculated without using try-and-error method. The correction factors for recycled multipass operations are plotted in the modified correction-factor charts, they are function of flow rate, mass-transfer-area, distribution coefficient and overall mass-transfer coefficient. Experimental results confirm the predicted values for the extraction of acetic acid from aqueous solution by methyl isobutyl ketone in the double-pass device.