Synthesis of MoVNbTe Catalyst with Increased Specific Surface Area and Higher Activity for Oxidative Dehydrogenation of Ethane to Ethylene

摘要

The present invention is a mixed oxide material containing molybdenum, vanadium, niobium and tellurium elements, and using Cu-Kα radiation has diffraction reflections h, i, k and l in the XRD spectrum, the diffraction reflection having a diffraction angle (2θ ) Have a peak at approximately 26.2 ° ± 0.5 ° (h), 27.0 ° ± 0.5 ° (i), 7.8 ° ± 0.5 ° (k), and 28.0 ° ± 0.5 ° (l), and a void of 0.1 cm 3 / g It relates to a mixed oxide material, characterized by having a volume. The mixed oxide material according to the invention comprises a) molybdenum, vanadium, niobium, and tellurium dioxide (as tellurium) -containing starting compounds, and an additional oxo ligand selected from the group consisting of oxalic acid and dicarboxylic acids and diols. Preparing a mixture of starting compounds, b) hydrothermally treating the mixture of starting compounds at a temperature between 100 ° C. and 300 ° C., separating and drying the mixed oxide material contained in the suspension produced in step b). It is prepared by a method comprising a.