The catalytic oxidation of isobutylene with Mo-Co-Fe-Bi-Sb-K-O systems

The catalytic properties of the systems based on bismuth, cobalt, and iron molybdates in the oxidation of isobutylene to alpha -methylacrolein were ex amined. The data on oxygen chemisorption kinetics on the catalysts were obt ained. The mechanism of partial oxidation of the olefin was studied in the pulse reaction mode. The bismuth molybdate phase was shown to be mainly res ponsible fur the selectivity of the catalytic action. The iron and cobalt m olybdate phases were shown to ensure the high rate of the hydrocarbon chemi sorption on the catalyst surface. A likely source of carbon dioxide may be the deep oxidation of alpha -methylacrolein and the methacrylic acid formed .