Synthesis of MoVNbTe catalyst with high specific surface area and higher activity for the oxidative Dehyxdrierung of ethane to ethylene

The invention relates to a mixed oxide material comprising comprising the elements molybdenum, vanadium, niobium and tellurium, which, when using Cu-Ka radiation, in the XRD diffraction reflections h, i, k and l whose peaks are at the diffraction angles (2θ) 26, are 2 ° ± 0.5 ° (h), 27.0 ° ± 0.5 ° (i), 7.8 ° ± 0.5 ° (k), and 28.0 ° ± 0.5 ° (l) characterized in that the mixed oxide has a pore volume of> 0.1 The compound oxide material according to the invention is prepared by a process comprising the steps of: a) preparing a mixture of starting compounds containing molybdenum, vanadium, niobium and tellurium dioxide containing tellurium as a starting compound and oxalic acid and another oxo ligand selected from the group of dicarboxylic acids and diols, b) hydrothermally treating the mixture of starting compounds at a temperature of 100 to 300 ° C, c) separating and drying the composite oxide contained in the resulting from step b) suspension.