Cobalt-containing multi-metal double-peak pseudo-boehmite and preparation method thereof

The invention discloses cobalt-containing multi-metal double-peak pseudo-boehmite and a preparation method thereof, and the preparation method comprises the following steps: when pseudo-boehmite is prepared by adopting a hydrothermal method, adding a water-soluble cobalt compound and a water-soluble silver compound into an aluminum source; then forming, drying in the shade, drying and roasting to obtain a multi-metal improved pseudo-boehmite finished product, and adding a non-metal modulating agent in the forming process; dipping the multi-metal improved pseudo-boehmite finished product in a potassium citrate solution, and carrying out acid-base property regulation to increase the alkalinity of the carrier; the preparation method comprises the following steps: taking multi-metal improved pseudo-boehmite subjected to acid-base property modulation as a carrier, and dipping in an aqueous solution of a molybdenum compound; and finally, drying in the shade, drying and roasting to obtain the cobalt-containing multi