Activated alumina is an efficient desiccant for high humidity environments and thermally stable, making it an excellent solution. Although, for safety, activated alumina should always be stored in tightly sealed containers to prevent harmful substances from seeping through and being absorbed.
Pharmaceuticals, machinery parts and electronics all need special packaging to guard against moisture and other contaminants.
High adsorption capacity
Activated alumina is an efficient desiccant that has an exceptional capacity for absorbing moisture. With many microporous channels with large surface areas that quickly absorb moisture, this desiccant has low dewpoint capabilities as well as crush strength for use in harsh environments and high selectivity that preferentially absorbs molecules with greater polarities – making it useful in applications like chromatography.
Numerous companies manufacture activated alumina desiccant. The production process starts by processing raw materials to remove impurities and grind into fine powder form, followed by treating with heat to create gamma alumina with increased porosity and surface area, followed by impregnating with moisture-absorbant solutions such as phosphoric acid or potassium permanganate for moisture absorption purposes. Once dry and packaged for distribution, activated alumina desiccants can then be stored safely until needed.
Activated alumina is nontoxic and poses no threat to humans, although inhalation or ingestion in large quantities should be avoided. Because this material does not react with most chemicals, transport regulations do not consider it hazardous; nonetheless it’s essential that enclosures monitor moisture levels closely so as to regenerate or replace desiccant when its capacity has become saturated.
低磨损
Activated alumina is an exceptional material, often employed as an adsorbent and desiccant. Due to its high crush strength and low abrasion properties, activated alumina is well suited for harsh environments as well as pressure applications. 此外, its low abrasion properties make it suitable for more delicate uses.
An activated alumina desiccant can protect your equipment and help to avoid corrosion, rusting and other problems by acting as an adsorbent made of heated aluminum oxide powder that forms highly porous structures capable of absorbing various chemicals including those with polar molecules; in addition it makes an excellent material for column chromatography.
Producing activated alumina requires an intricate process. Raw materials must first be ground into fine powder before being treated with an activation solution that improves its moisture-adsorbing abilities – this typically involves heating it to temperatures above 1000 degC before treating with activated solutions and heated at higher temperatures until gamma alumina forms, with higher surface area and pore sizes than traditional alumina.
Once activated, activated alumina is impregnated with chemicals to further increase its moisture-absorbent properties, such as phosphoric acid or potassium permanganate. After impregnation is complete, it’s dried, packaged for shipping and has an expected shelf life of one year when kept uncompromised and in ideal conditions for storage.
Low moisture absorption
Activated alumina desiccants have low moisture absorption rates, making them perfect for protecting sensitive electronic components and equipment from moisture damage. 此外, their regeneration is simple and they feature high strength and crush resistance, making them an excellent option for compressed air systems.
Aluminum hydroxide is transformed into gamma alumina through high temperature treatment, creating an extremely porous and porous alumina powder with higher porosity and surface area than raw alumina. After grinding into powder form, activation with temperatures exceeding 1000 degC causes it to undergo phase transformation into gamma alumina; ready for use as desiccant.
Axens’ activated alumina boasts optimal pore size distribution and surface area to effectively dehydrate air, gases, and liquids. It is frequently employed in industrial gas drying systems to prevent hydrate formation and free water condensation in compressed air as well as natural gas systems to minimize equipment blockage. 此外, selective drying applications use it for co-adsorption prevention of acid compounds.
Activated alumina desiccant has a low humidity tolerance and should only be stored in dry environments away from direct sunlight and rain. Regeneration with dry chemicals such as Epsom salts or silica gel should occur after each use, and using a humidity indicator card can assist you with keeping track of its effectiveness to replace when saturated.
High temperature resistance
Activated alumina is a solid desiccant material made of aluminum oxide and heated into a porous form with high crush strength, suitable for drying liquids and gases. It binds strongly with molecules with higher polarities – making it suitable for column chromatography applications.
Activated alumina differs from other desiccants by being resistant to chemical degradation from exposure to extreme conditions, while remaining physically stable – and can easily be regenerated when necessary. Therefore, it has many uses, such as:
In compressed air systems, activated alumina has an excellent combination of low water-loading capacity and crush strength, as well as resistance to liquid water slugging that might occur upstream of aftercoolers, separators or drain traps. 此外, its original absorption capacity can be restored without losing pores size or surface area.
Activated alumina provides an economical solution for drying industrial gases and compressed air systems. With its superior absorption capacity compared to silica gel and ability to achieve lower dew points, activated alumina makes an excellent choice for compressor systems. 此外, activated alumina resists formation of hydrates and free water condensation in natural gas systems as well as removal of degradation acids from transformer and lubricating oils – essential tasks in any oil and gas industry environment.