The kinetics of propanol oxidation by quinquivalent vanadium in the presence of H2SO4 has been followed by UV-spectrophotometer at 30 °C temperature. It has been found that sodium dodecyl sulfate (SDS) micelles produce a large catalytic effect on this oxidation process. The pseudo-first-order rate constants for the reaction increases with SDS concentrations. The kinetic results have been explained by considering the preferential partitioning of reactants between the micellar and aqueous phase and also local the concentration effect. The oxidized product propionaldehyde is identified by 2,4-DNP test and 1H-NMR spectral measurement. The formation of aggregate in reaction condition was confirmed by measuring the CMC value of SDS in aqueous medium and in the presence of propanol by conductivity measurements. The change in the size of aggregate, from DLS measurement, confirms the localization of reactant species towards the aggregate, which is the consequence of rate enhancement.
Research on Chemical Intermediates – Springer Journals
Published: Nov 18, 2014
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