Abstract
The interfacial mass transfer kinetics of acetylacetone (acac), ethylene glycol mono- n-butyl ether (EGBE) and ethylene glycol monophenyl ether (EGPE) across water-carbon tetrachloride (Ccl 4) and water-chloroform (CHCl 3) interfaces were studied by stirring the two phases at various speeds, maintaining a quiescent interface with a constant area. In the analysis of data, two rate-determining steps consisting of a diffusion toward the interface and a mass exchange between the interface and bulk phases are considered. It is shown that the transfer of EGBE and EGPE in both CHCl 3 and Ccl 4 systems is controlled by the diffusion step even at high stirring speeds, whereas the transfer of acac in Ccl 4 is controlled by the interfacial exchange step at high stirring speeds. An irreversible transfer has been also observed in the EGBE and EGPE systems at low stirring speeds.
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