Introduction to activated alumina

Alumina, commonly known as alumina, has a chemical formula of Al2O3. White powder, density 3.9~4.0g/cm3, melting point 2050℃, boiling point 2980℃. It is insoluble in water and slowly soluble in concentrated sulfuric acid. It can be used to refine aluminum metal and is also a raw material for making crucibles, porcelain, refractory materials and artificial gemstones.

Alumina, which is mainly used as adsorbent, catalyst and catalyst carrier, is called "activated alumina". It has the characteristics of porosity, high dispersion and large specific surface area, and is widely used in petrochemical, fine chemical, biological and Pharmaceutical and other fields.

Activated alumina is generally produced by heating and dehydrating aluminum hydroxide. Aluminum hydroxide is also called hydrated alumina. Its chemical composition is Al2O3·nH2O. It can usually be divided into aluminum oxide trihydrate and aluminum oxide monohydrate according to the number of crystal water contained. After heating and dehydration of aluminum hydroxide, γ-Al2O3 can be obtained. It is commonly referred to as activated alumina.