Fluidized bed hydrotreating catalyst and preparation method thereof

The invention relates to a fluidized bed hydrotreating catalyst and a preparation method thereof, and the preparation method comprises the following steps: preparing a suspension from alumina, aluminum hydroxide, an alkaline auxiliary agent and deionized water, and carrying out liquid grinding, hydrothermal reaction, washing and filtering to obtain a wet filter cake A; adding deionized water, a peptizing agent solution and a dispersing agent solution into the obtained wet filter cake A to prepare sol B with certain aluminum oxide content; injecting the sol B into a column containing oil on the upper layer and an alkaline solution on the lower layer for forming, and drying and roasting a formed substance to obtain a product spherical carrier C; and dipping the carrier in an active metal component, and directly roasting the carrier in a roasting furnace to obtain the fluidized bed hydrogenation catalyst. The catalyst has the characteristics of proper granularity, uniform particles, excellent performance, high s