Preparation of maleic anhydride using a crystalline vanadium(IV)bis(metaphosphate) catalyst
US4171316A · kind A · utility
14Cited by
1References
10Claims
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Key dates
| Filing date | Mar 24, 1978 |
| Grant date | Oct 16, 1979 |
| Priority date | — |
| Expiry date | Mar 24, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/252
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the preparation of maleic anhydride in high yield and selectivity which comprises partially oxidizing an unsaturated aliphatic hydrocarbon selected from 1-butene, 2-butene and 1,3-butadiene or mixtures thereof in the vapor phase at elevated temperatures with oxygen or an oxygen-containing gas in the presence of a single phase vanadium(IV)bis(metaphosphate) catalyst having the formula VO(PO.sub.3).sub.2. Preferably the reaction is carried out in the presence of steam to enhance the selectivity to maleic anhydride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.