X-ρ-type alumina desiccant, white ball, strong ability to absorb water. Under certain operating conditions and regeneration conditions, its drying depth up to the dew point temperature below -40 ℃, is a trace of the depth of water and efficient drying agent. Widely used in petrochemical gas, liquid-phase drying, for the textile industry, oxygen industry and automation instrument wind drying, air separation industry pressure swing adsorption. Due to the high net heat of the monolayer, it is ideal for use in non-thermal regenerators. Alumina desiccant is white spherical porous particles with uniform particle size, smooth surface, high mechanical strength, strong hygroscopicity and no swelling after water absorption. The products are non-toxic, tasteless, odorless, insoluble in water and organic solvents, Is high-purity alumina by the scientific deployment, catalytic finishing. It can be used as high fluorine water fluoride removal agent, so that a large surface area of the molecular adsorbent. When the raw water PH value and alkalinity lower fluoride removal capacity higher, greater than 3.0mg / g. Can be used for drinking water and industrial installations in addition to fluoride, arsenic removal, sewage decolorization, deodorant.