I. What is activated alumina powder?
Activated alumina powder is not ordinary bauxite powder. It is a porous, highly dispersed solid material made from aluminum hydroxide that has been dehydrated and activated at high temperatures. The key lies in the "activation" process, which creates countless tiny pores within it, resulting in a huge surface area and endowing it with exceptional adsorption properties, surface activity, and thermal stability.
Simply put, it's like an extremely dry, super-sponge filled with countless tiny cells, actively capturing and locking various molecules.
II. Exceptional Properties of Activated Alumina Powder
Ultra-High Surface Area and Adsorption: Its enormous surface area enables efficient adsorption of water molecules, fluoride ions, arsenides, and various organic vapors.
Excellent Thermal Stability: It maintains structural stability and performance at elevated temperatures, making it suitable for harsh environments.
High Mechanical Strength and Abrasion Resistance: The particles are hard and resist pulverization, resulting in a long service life and the ability to withstand bed pressure and airflow.
Chemical Inertness: It is unreactive with most chemicals and gases, ensuring safety, reliability, and a wide range of applications.
Diverse Pore Size Distribution: Through production process control, products with varying pore sizes (micropores, mesopores) can be customized to meet diverse adsorption and catalytic needs.
III. Core Application Areas
Adsorbents and Desiccants:
Industrial Gas Drying: Deep drying of compressed air, natural gas, cracked gas, refrigerants, etc., with dew points down to -70°C.
Liquid Drying: Dehydration and purification of organic liquids such as transformer oil and lubricating oil.
Water Treatment and Purification:
Defluoridation Agents: Efficiently remove excess fluoride from drinking water, preventing and controlling endemic diseases such as dental fluorosis.
Arsenic Removers: Adsorb arsenic from water, addressing heavy metal pollution.
Petrochemical Catalysts and Carriers:
As catalyst carriers, widely used in reactions such as hydrogenation, dehydrogenation, and cracking.
It can also serve as a catalyst itself, used in reactions such as alcohol dehydration to olefins.
And so on.
IV. How to Choose High-Quality Activated Alumina Powder?
When purchasing, consider more than just price. The following key indicators are crucial.
Purity: High purity (e.g., ≥99%) is essential for ensuring chemical inertness and preventing side reactions.
Specific Surface Area: A larger specific surface area generally indicates greater adsorption capacity.
Pore Size Distribution: Select the appropriate pore size based on the size of the target molecules.
Compressive Strength: High strength means low loss and a long service life.
Static Adsorption Capacity: This is a key indicator of water absorption capacity, particularly when used as a desiccant.
Supplier Expertise and Service: A quality supplier can provide technical consulting, customized services (such as custom particle and pore sizes), and a stable supply guarantee.
