Synthesis of a catalyst MoVTeNb from inexpensive metal oxides

The invention relates to a method for producing a compound oxide, comprising the steps of: contains a) preparing a mixture of starting compounds containing the starting compounds of molybdenum, vanadium, niobium and tellurium and two chelating oxo, b) hydrothermally treating the mixture of starting compounds at a temperature of 100 ° C to 300 ° C, to obtain a product suspension, c) separating and drying the solid contained in the resulting from step b) product suspension, d) activating the obtained from step c) solid in inert gas. The invention also relates to a mixed oxide for the oxidation of ethane, comprising the elements molybdenum, vanadium, niobium and tellurium, with the following stoichiometry: Mo 0.27