Abstract
Tetraalkylammonium (TAA) salts of transition metal substituted dodecatungstophosphate, (TAA)5PW11O39.H2O (where TAA = (C2H5)4N (TEA), (C3H7)4N (TPA), and (C4H9)4N (TBA), and M = Mn 2+ , Fe 2+ and Co2 ) catalyzed the oxidation of styrene with H2O2 at 353 K. Except for the Mn 2+ salt, other TAA salts were found to be active and gave mainly benzaldehyde and styrene oxide products. Among the catalyst tested, TBA (tetrabutylammonium) salt of Co 2+ was more active in styrene oxidation. Kinetics of TBA-PW11CoO39 catalyzed oxidation of styrene have been investigated and mehanism for oxidation of styrene has been proposed.
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