Catalyst for production of phthalic anhydride

Details Catalyst for production of phthalic anhydride Catalyst for production of phthalic anhydride

1980-11-26

1982-10-26

Gantz, Delbert E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252437, B01J 2714

Patent

active

043561128

ABSTRACT:
A catalyst for the production of phthalic anhydride by the catalytic vapor-phase oxidation of o-xylene or naphthalene with molecular oxygen, said catalyst comprising a catalytically active material composed of 1 to 20 parts by weight of V.sub.2 O.sub.5 of vanadium oxide and 99 to 80 parts by weight as TiO.sub.2 of anatase-type titanium oxide being porous and having a particle diameter substantially of 0.4 to 0.7 micron and a specific surface area of 10 to 60 m.sup.2 /g, and per 100 parts by weight of the sum of these two components, 0.01 to 1 part by weight as Nb.sub.2 O.sub.5 of niobium, 0.05 to 1.2 parts by weight as oxide of potassium, cesium, rubidium or thallium, 0.2 to 1.2 parts by weight as P.sub.2 O.sub.5 of phosphorus and 0.5 to 10 parts by weight as Sb.sub.2 O.sub.3 of antimony, said catalytically active material being supported on a porous carrier in an amount of 3 to 200 g/100 cc of carrier.

REFERENCES:
patent: 3562185 (1971-02-01), Friedrichsen et al.
patent: 3684741 (1972-08-01), Friedrichsen et al.
patent: 3870655 (1975-03-01), Narba et al.
patent: 3926846 (1975-12-01), Ono et al.
patent: 4046780 (1977-09-01), Nakanishi et al.

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