| 摘要 |
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(PO3)2. Preferably the reaction is carried out in the presence of steam to enhance the selectivity to maleic anhydride.
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