| abstract |
The present invention has the general formula M a V 2 O b (PO 4 ) c (I) [where M is V, which has a crystal structure and is characterized by a predetermined diffraction reflection in powder X-ray diffraction. Represents one or more metals selected from Cr, Fe, Co, Ni, Ru, Rh, Pd, Cu, Zn, Cd, Hg, Be, Mg, Ca, Sr and Ba, where a is 0.5 to 1.5 indicates a value of 1.5 to 2.5, and c indicates a value of 1.5 to 2.5]. Preferred representatives are CoV 2 O 2 (PO 4 ) 2 , NiV 2 O 2 (PO 4 ) 2 or CuV 2 O 2 (PO 4 ) 2 . The metal oxide phosphate is suitable, for example, as a gas phase oxidation catalyst for producing maleic anhydride from a hydrocarbon having at least 4 carbon atoms. |