Synthesis of MoVNbTe catalysts with reduced niobium and tellurium contents and higher activity for oxidative dehydrogenation of ethane

摘要

The present invention comprises the elements molybdenum, vanadium, niobium and tellurium and has, in XRD, the diffraction reflections h, i, k and l when using Cu-Kα radiation, the peaks of which are approximately the diffraction angle (2θ). 26.2 ° ± 0.5 ° (h), 27.0 ° ± 0.5 ° (i), 7.8 ° ± 0.5 ° (k) and 28.0 ° ± 0.5 ° (l) ), Wherein the stoichiometric ratio is: Mo1VaNbbTecOn (I) (where a = 0.2-0.35, b = 0 to 0.08, c = 0 Up to 0.08 (n = number determined by the valence and abundance of the non-oxygen element in (I)).