THE MODIFICATION OF THE CATALYTIC PERFORMANCE IN THE PARTIAL OXIDATION OF ACROLEIN BY THE ADDITION OF OXYGEN TRANSFERRING COMPOUNDS TO A MULTICOMPONENT OXIDIC CATALYST

High yields of acrylic acid are obtained in the partial oxidation of a crolein on multicomponent oxides containing mainly Mo, V, W and Cu. Th e system can be described by use of a simple network of two parallel a nd one consecutive reaction. The basic mechanism of the partial oxidat ion is still not known. However, if oxygen spillover is involved, the addition of an oxygen donator to the multicomponent catalyst should in fluence the kinetics. Different antimonates, considered as oxygen dono rs and mixtures (1:1 by weight) of these antimonates with the original catalyst have been studied, The pure antimonates showed no activity. In the mixed catalysts a marked effect was observed thus giving a stro ng hint that oxygen spillover is playing a major role in the partial o xidation of acrolein on oxidic catalyst.