19

2019

-

06

Activated alumina adsorbent


Activated alumina is made by heating and dehydration of aluminum hydrate. Its properties depend on the structural state of the initial hydroxide. Generally, it is not pure Al2O3, but a partially hydrated amorphous porous structure material, in which there are not only amorphous gels, but also hydroxide crystals.

Activated alumina is made by heating and dehydration of aluminum hydrate. Its properties depend on the structural state of the initial hydroxide. Generally, it is not pure Al2O3, but a partially hydrated amorphous porous structure material, in which there are not only amorphous gels, but also hydroxide crystals. Because its capillary channel surface has high activity, it is also called activated alumina. It has a strong affinity for water and is an adsorbent for deep drying of trace water. Under certain operating conditions, its drying depth can reach below the dew point of -70 ° C.