Catalyst for production of phthalic anhydride
US4356112A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1980 |
| Grant date | Oct 26, 1982 |
| Priority date | — |
| Expiry date | Nov 26, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2523/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.