Process for preparing phosphorus-vanadium mixed oxide oxidation catalysts
US4567158A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1983 |
| Grant date | Jan 28, 1986 |
| Priority date | — |
| Expiry date | Dec 28, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2523/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Phosphorus-vanadium mixed oxide oxidation catalysts are prepared by introducing a substantially pentavalent vanadium-containing compound and a pentavalent phosphorus-containing compound into an alcohol medium capable of reducing the vanadium to a valence state less than +5 in the presence of an alcohol-modifying agent to form a phosphorus-vanadium mixed oxide catalyst precursor. The catalyst precursor is recovered, dried, formed into desired structures, and calcined at temperatures from about 250.degree. C. to about 600.degree. C. The catalysts are highly effective in that they exhibit a weight/weight productivity of at least 70 grams of maleic anhydride per kilogram of catalyst per hour.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.