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Palladium salts of heteropolyanions, of the Keggin-series H 3+n PV n Mo 12−n O 40 , supported on silica, have been successfully applied as catalysts in the gas-phase Wacker oxidation of 1-butene. In such catalysts the palladium reaction centre (Pd 2+ ) and the redox component (HPA) are combined in one complex. At 343 K and atmospheric pressure a high initial...
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