... and catalyst carrier. It is also a kind of trace water desiccant and the pole-molecular absorbent, according to the absorbed ... molecular polarization, the attachment force is strong for water, oxide, acetic acid, alkali etc.Activated alumina defluorinated just as ... /cm3. It has high strength, low abrasion, no soften in water, no expansion, no powdery, no crack. It can widely used ...