Supported catalyst for the preparation of phthalic anhydride
AssigneeOxidaciones Organicas, C.A. "OXIDOR"
InventorKlaus M. Felice
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Abstract
A catalyst is disclosed comprising an inert carrier supporting a catalytically active mass of vanadium pentoxide, titanium dioxide, promoters and inhibitors for use in the gas phase reaction of ortho-xylene with air to produce phthalic anhydride without addition of sulfur or sulfur dioxide to the ortho-xylene-air mixture.
Claims18
A catalyst capable of producing phthalic anhydride from o-xylene in the substantial absence of sulfur compounds, consisting essentially of a substantially poreless, mechanically-stable, temperature-resistant, inert carrier to which there is adhered a catalytically active surface coating containing the following components in the following proportions, calculated as the oxides, in relation to one mole of vanadium pentoxide;
- potassium oxide, from about 0.02 to 0.05 mole;
- boron trioxide, from about 0.002 to 0.005 mole;
- antimony trioxide, from about 0.008 to 0.015 mole;
- and titanium dioxide, from about 10 to 15 moles.
Dependencies are inferred from the claim text.