The invention discloses a
residual oil hydrotreating catalyst and a preparation method thereof. The pore diameters of mesopores of the catalyst are intensively and uniformly distributed; meanwhile, the catalyst is a bimodal pore catalyst with macropores, wherein 50% or more mesopores of 10-30 nm are distributed in a concentrated mode, 25% or more macropores are distributed in a concentrated mode,and the preparation method comprises the steps that an aluminum
salt solution is prepared,
sol is mixed through a pH swing method, an organic pore-enlarging agent is added, the mixture is guided and added into a gelatinizing tank to be gelatinized, and an aluminum
oxide carrier is obtained through aging,
drying, forming and
roasting; the aluminum
oxide carrier is impregnated in impregnation liquid; and by
drying and
roasting, the hydrodemetallization catalyst is obtained, the catalyst provided by the invention has good diffusivity and excellent demetalization performance, can meet the requirements of
diffusion ducts of Ni and V-containing heavy
metal compounds, significantly improves the
nickel and
vanadium removal performance of the catalyst, and improves the demetalization activity,
metal capacity and activity stability of the catalyst, and the preparation process is simple and easy to operate.