Role of MoVTeNb oxide catalyst constituent phases in propane oxidation to acrylic acid.

The catalytic activity of MoVTeNbO catalyst and its constituent phases (M1, M2 and Mo 5 O 14 -like) in the oxidation of propane, as well as propylene and acrolein, which are intermediates of acrylic acid formation from propane, was studied. In all the reactions, the М1 phase shows higher activity and selectivity, compared to M2 and Mo 5 O 14 -like phases; its presence being sufficient for efficient proceeding the propane oxidation to acrylic acid.