Catalyst composition, useful as catalyst to prepare acrolein from propene, and methacrolein from isobutene, comprises an active inorganic catalyst material exhibiting superparamagnetic particles

摘要

Catalyst composition comprises an active inorganic catalyst material exhibiting superparamagnetic particles (SPM particles). An independent claim is included for a method for the catalytic gas phase oxidation of an olefin compound of formula (CH 2=CRCH 3) (I) to an aldehyde compound of formula (CH 2=CRCHO) (II) in presence of oxygen and the catalytic composition as catalyst, where: the oxygen is introduced into a reaction chamber through a porous layer exhibiting SPM particles, and the supply of the oxygen is controlled by producing and removing a magnetic field in the porous layer parallel to the penetration direction of the oxygen molecule. R : H or CH 3.