Introduction to alpha-activated alumina

Alpha-activated alumina, as a specific form of alumina, has a series of unique physical and chemical properties. The following is a clear introduction to alpha activated alumina:

1. Basic features

Name and properties: Alpha activated alumina, also known as activated alumina, is a porous and highly dispersible solid material.

Surface Area: It has a large surface area, which gives its microporous surface the properties required for catalysis.

Stability: α-alumina is the most stable phase of all alumina and is closely related to its crystal structure.

2. Physical and chemical properties

Form: Spherical activated alumina pressure swing oil adsorbent is white spherical porous particles with uniform particle size and smooth surface.

Mechanical strength: high mechanical strength and strong hygroscopicity. It does not swell or crack after absorbing water and remains in its original shape.

Solubility: non-toxic, odorless, insoluble in water and ethanol.

3. Application

Catalyst and carrier: α-activated alumina is widely used as a catalyst and catalyst carrier for chemical reactions, such as in petrochemical, fine chemical, biological and pharmaceutical fields.

Desiccant: It is an efficient desiccant for deep drying of trace amounts of water, especially suitable for heatless regeneration devices.

Adsorbent: Activated alumina has the ability to selectively adsorb gas, water vapor and moisture in certain liquids, and can be used to adsorb lubricating oil vapor from polluted oxygen, hydrogen, carbon dioxide, natural gas, etc.

4. Production

Raw materials: There are two main raw materials for the production of activated alumina. One is "quick release powder" produced by gibbsite or Bayer stone, and the other is pseudo-aluminate produced by aluminate or aluminum salt or both. Boehmite.

Preparation process: Activated alumina is generally produced by heating and dehydrating aluminum hydroxide. After heating and dehydrating aluminum hydroxide, γ-Al₂O₃ can be obtained, which is commonly known as activated alumina.

5. Summary

Alpha activated alumina plays an important role in many fields due to its high surface area, porosity, high dispersion and excellent thermal stability, especially in catalysts and catalyst carriers, desiccants and adsorbents.