Synthesis of MoVNbTe catalyst with increased specific surface area and higher activity for oxidative dehydrogenation of ethane to ethylene

摘要

The present invention comprises the elements molybdenum, vanadium, niobium and tellurium, and has the diffraction reflections h, i, k and l in XRD when Cu-Kα radiation is used, and their peaks have diffraction angles (2θ) of 26. 0.2 ° ± 0.5 ° (h), 27.0 ° ± 0.5 ° (i), 7.8 ° ± 0.5 ° (k) and 28.0 ° ± 0.5 ° (l) , Wherein the mixed oxide material has a pore volume of greater than 0.1 cm3 / g. The mixed oxide material according to the invention comprises a) molybdenum, vanadium, niobium and tellurium dioxide as tellurium-containing starting compound, and oxalic acid and further oxo ligands selected from the group consisting of dicarboxylic acids and diols. B) hydrothermally treating the mixture of starting compounds at a temperature of 100 to 300 ° C., c) mixed oxidation contained in the suspension resulting from step b) It is manufactured by a method including a step of separating and drying material materials.