Patent ID: 7799373

Claim:
A process for coating internals which have previously been introduced into a reactor, except for the coating of electrically heatable, at least partly open-cell foams, with a catalytically active solid material or a precursor thereof, in which an aerosol which contains the catalytically active material or the precursor thereof as a disperse phase is provided and the aerosol is passed through the reactor at a rate in the range of from 0.1 to 4 m/s, which is established so that the disperse phase of the aerosol is deposited on the internals in the reactor and wherein the reactor is employed for carrying out oxidation or dehydrogenation reactions and the oxidation or dehydrogenation reactions are the synthesis of maleic anhydride, phthalic anhydride, acrolein, (meth)acrylic acid, or ethylene oxide.