abstract |
The present invention relates to a catalyst containing a vanadium-phosphorus oxide and an alkali metal, wherein the weight proportion of alkali metal in the vanadium-phosphorus oxide is in the range of 10 to 400 ppm, based on the total weight of the vanadium-phosphorus oxide, a process for its preparation and the use of the catalyst for the gas phase oxidation of hydrocarbons, in particular for the production of maleic anhydride. |