CARRYING CATALYST FOR OXIDIZING OOXYLOL OR NAPHTHALENE TO PHTHALIC ANHYDRIDE

摘要

A process for the catalytic oxidation of o-xylene or naphthalene with air to form phthalic anhydride wherein a supported catalyst is used comprising an inert nonporous carrier and applied thereto a thin layer of catalytically active material which comprises from 1 to 40% by weight of vanadium pentoxide and from 60 to 99% by weight of anatase and which has a vanadium pentoxide content of from 0.05 to 4% by weight based on the supported catalyst wherein the catalytically active material contains from 0.01 to 0.15% by weight of rubidium or caesium in the form of a compound devoid of sulfur, based on anatase.