Fluidized-bed catalyst suitable for the production of halogenated aromatic nitriles, its preparation and application thereof

A catalyst suitable for use as a fluidized-bed catalyst for the production of halogenated aromatic nitriles, comprising an active component and a support, the active component being a complex having the following composition expressed in atomic ratio:

• VPaCrbAcMdOx
• wherein:
• A represents at least one metal selected from the group consisting of alkali metals and alkaline earth metals;
• M represents at least one element selected from the group consisting of Ti, Zr, Hf, La, Ce, Nb, Mo, W, Co, Zn, Fe, Ni, B, Sb, Bi, As, Ga, Ge, Sn and In;
• a is in a range of 0-1.5;
• b is in a range of 0.1-1;
• c is in a range of 0-0.5;
• d is in a range of 0-1;
• x is the number of oxygen atoms required to satisfy the valence of each element in the active component;
• the support being selected from the group consisting of silica and molecular sieves, wherein in the XRD spectrum of the catalyst, diffraction peaks are present at 2θ=27.8±0.5° and 2θ=13.8±0.5°, and the ratio of the height (I1) of the diffraction peak at 2θ=27.8±0.50 to the height (I2) of the diffraction peak at 2θ=13.8±0.50, i.e. I1:I2, is in a range of 3.5-6.