What is Activated alumina?

The production of activated alumina desiccant involves a series of steps to create the highly porous and adsorptive material. Aluminum oxide (alumina) is the primary precursor used in this process. Initially, aluminum hydroxide is extracted from bauxite ore or other sources, and then subjected to a calcination process at elevated temperatures. This calcination removes water molecules and transforms aluminum hydroxide into aluminum oxide, which serves as the basis for activated alumina. Subsequently, the aluminum oxide is further processed through a controlled activation process, typically involving high-temperature treatments in the presence of steam or other gases. This process generates a network of pores and increases the surface area of the material, enhancing its moisture adsorption capabilities. The resulting activated alumina is then cooled, crushed, and sieved to achieve the desired particle size for various applications. The specific parameters of the calcination and activation steps influence the pore structure and surface area, ultimately determining the efficiency of the activated alumina desiccant in moisture adsorption and other adsorptive applications.