Activated alumina is a porous functional adsorbent with high specific surface area. It is manufactured via calcination and dehydration at medium-low temperatures ranging from 400 to 600°C through precise regulation of crystal structure transformation. The product appears as uniform white spherical or extruded strips, featuring rigid texture and smooth surface. It is non-toxic, odorless, and insoluble in common solvents such as water and ethanol.
Boasting strong adsorption capacity, outstanding heat resistance and high mechanical strength, activated alumina will not swell, crack or pulverize after water absorption during service. It can be recycled repeatedly via thermal regeneration with stable and durable performance, serving as an indispensable fundamental material for industrial purification and catalysis industries.
As a mature high-performance industrial desiccant, activated alumina thoroughly removes trace moisture from various gases including compressed air, natural gas and refrigerants. It is widely deployed in petrochemicals, instrument air drying, electronics manufacturing and other sectors. It effectively prevents equipment corrosion, condensation and malfunctions caused by water vapor, ensuring long-term stable and efficient operation of complete production lines.
In potable water treatment, it is a globally recognized premium defluoridation agent. Its optimal working condition is weakly acidic water with a pH range of 5.5–6.5. Under such circumstances, it selectively adsorbs fluoride ions efficiently and steadily reduces fluoride content in water to meet national drinking water standards, safeguarding drinking water safety. Note that its defluoridation performance declines significantly in neutral or weakly alkaline water.
For petrochemical and fine chemical industries, gamma-phase activated alumina adopted for industrial use features stable physicochemical properties and acts as a cost-effective catalyst and catalyst support. It can carry noble metals including platinum, palladium and nickel to produce hydrodesulfurization catalysts widely used in oil hydrotreating processes. In addition, it can be directly utilized as catalytic material in the core Claus sulfur recovery process to remarkably improve sulfur conversion rate and cut down production energy consumption.