Activated alumina is produced using two types of raw materials: one is "quick-dehydrated powder" derived from gibbsite or bayerite, and the other is pseudo-boehmite synthesized from aluminate salts, aluminum salts, or a combination of both.
x-ρ alumina production
x-ρ alumina is the main raw material for the production of activated alumina balls, referred to as FCA abroad, and called "fast depowdering" in China because it is alumina powder produced by rapid dehydration method. "Quick Depowdering" is a mixture of X-alumina and ρ-alumina, and the content varies due to different production conditions.
Production method of pseudo-diaspore
Artificially produced alumina monohydrate and alumina trihydrate cannot be used as desiccant, adsorbent, catalyst and catalyst carrier due to low specific surface area, small pore volume and low activity. Alumina monohydrate or alumina trihydrate must be processed into pseudo-diaspore. Pseudo-diaspore has high specific surface area, large pore volume, large pore size and high activity, which is suitable for use as desiccant, adsorbent and catalyst carrier in petrochemical, fertilizer and tail gas fields.
