Production of main raw materials of activated alumina

Activated alumina is a porous, highly dispersed solid substance with a high specific surface area, and its microporous structure has the properties required for catalysis, 

such as adsorption performance, surface acidity and thermal stability. 

Activated alumina has a wide range of industrial uses, mainly used as desiccant, adsorbent, catalyst and catalyst carrier. 

Production of main raw materials of activated alumina

χ, ρ - production of alumina.

χ,ρ-alumina is the main raw material for the production of activated alumina balls, which is abbreviated as FCA in foreign countries. 

In China, it is called "quick powder removal" because it is produced by rapid dehydration method. 

"Quick powder" is a mixture of χ-alumina and rho-alumina, and the content is different due to the difference in production conditions.

The key to the production of χ, ρ-alumina is rapid dehydration, which is usually carried out in a fluidized bed reactor, 

and the bed temperature is controlled by combustion gas or liquid.

The Tianjin Institute of the former Ministry of Chemical Industry successfully developed the production technology of the suspension heating 

and quick-release method with the characteristics of Chinese technology. 

The conical reactor was used to add the dried and pulverized aluminum hydroxide from the side, 

and it was flash roasted in a rapid dehydration furnace for 0.1 ~1.0 s, a mixture of χ-alumina and rho-alumina is obtained.