Journal of Catalysis, Vol.211, No.2, 445-450, 2002
Kinetics of one-stage Wacker-type oxidation of C-2-C-4 olefins catalysed by an aqueous PdCl2-heteropoly-anion system
The steady-state kinetics of the one-stage Wacker oxidation of gaseous olefins such as ethene, propene, and 1-butene by oxygen (1:2 stoichiometric mixture of O-2 and olefin) to form acetaldehyde, acetone, and methyl ethyl ketone, respectively, was studied in a semicontinuous reactor. The catalytic system involves an aqueous solution of Pd(II) chloride (0.05-2 mM Pd(II), [Pd(II)]/[Cl-] = 1:50) and Keggin-type heteropoly anions [PMo9V3O40](6-) (50 mM), at 20-50degreesC. Under these conditions in a steady state, the reactivity of olefins increases in the order ethene less than or equal to1-butene