Modified bentonite drying agent and preparation method thereof

The invention provides a modified bentonite drying agent and a preparation method thereof, the modified bentonite drying agent comprises gamma-Al2O3 based bentonite and porous gamma-Al2O3, and the porous gamma-Al2O3 is distributed on the outer side of a crystal layer of the gamma-Al2O3 based bentonite. Spraying the aluminum salt solution into calcium bentonite, and extruding by two or more groups of double-roller machines connected in series to obtain aluminum bentonite; stacking, drying and crushing to obtain aluminum-based bentonite powder; and spraying aluminum salt into the aluminum-based bentonite powder, extruding, granulating, drying and calcining to obtain the modified bentonite drying agent. The modified bentonite desiccant has excellent moisture absorption effect and compressive strength, in addition, the functions of removing ozone, oxygen and other oxidizing gases and removing hydrogen sulfide, organic amine, mercaptan, thioether and other odor gases are added, the expected effect can be achieved