Abstract
Abstract Extraction of phosphoric acid from aqueous solutions, by using n-butanol as a solvent, has been studied in a pulsed packed column. The variables studied are feed flow rate, solvent flow rate, pulsation frequency, and amplitude. Based on the results obtained, pulsation was found to increase the rate of mass transfer. Better extraction efficiencies were obtained when the column was pulsed. The aqueous-phase flow rate was found to affect the extraction efficiency slightly whereas the solvent flow rate appreciably increased the extraction efficiency. The effects of pulse amplitude and frequency are interdependent. When operating at low frequencies, the amplitude should be larger than the packing size if any enhancement in the extraction efficiency is to be achieved. But, generally, an increase in either the amplitude or the frequency was found to increase the extraction efficiency.
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