Phosphorus/vanadium catalyst preparation
US6858561B2 · kind B2 · utility
12Cited by
16References
11Claims
0Family size
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Inventors
Key dates
| Filing date | May 15, 2003 |
| Grant date | Feb 22, 2005 |
| Priority date | — |
| Expiry date | Jun 5, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2523/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for preparing a catalyst for maleic anhydride production wherein a +5 vanadium compound such as V2O5, an anhydrous phosphoric acid, and optionally promoters are admixed in an organic alcohol solvent, the admixture is rapidly brought to reflux and thereafter refluxed to reduced the vanadium compound to the desired degree, the reflux mixture is cooled, precursor crystals are separated by filtration and then dried and calcined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.