Production of maleic anhydride using molybdenum-modified vanadium-phosphorus oxide catalysts
US5929256A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Aug 12, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2523/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An active catalyst having a crystal structure corresponding to that of a catalyst that has been prepared and activated by the following process. A substantially pentavalent vanadium-containing compound is reacted with a pentavalent phosphorus-containing compound in an alcohol medium capable of reducing the vanadium to an oxidation state of less than +5. Molybdenum is incorporated into the product of the reaction, thereby forming a solid molybdenum-modified precursor composition. The alcohol is removed to produce a dried solid molybdenum-modified precursor composition. Shaped bodies comprising said dried solid molybdenum-modified precursor composition are formed. The dried formed molybdenum-modified catalyst precursor composition is activated to transform it into the active catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.