Niobium-doped vanadium/phosphorus mixed oxide catalyst
US7638457B2 · kind B2 · utility
11Cited by
14References
36Claims
0Family size
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Key dates
| Filing date | Sep 15, 2004 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Oct 2, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2523/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a process for the preparation of a modified vanadium/phosphorus mixed oxide catalyst for the partial oxidation of n-butane to maleic anhydride. The catalyst comprises vanadyl pyrophosphate as main component and niobium as a promoter element in an amount corresponding to an atomic ratio of vanadium to niobiurn in the range of 250:1 to 60:1. The catalyst exhibits improved activity, improved yield of maleic anhydride, and optimal performance from the very beginning of its catalytic lifetime.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.