Activated alumina is generally prepared by heating and dehydrating aluminum hydroxide at 450-600°C. According to the different raw materials, there are mainly acid precipitation method, alkali precipitation method, aluminum alkoxide hydrolysis method, carbonization method and other synthetic methods. After synthesis, activated alumina balls have the characteristics of porosity, high dispersion, and large surface area, and their microporous surface has the characteristics required for catalysis, such as adsorption performance, surface activity, excellent thermal stability, etc., so it is widely used Ground is used as a catalyst and catalyst carrier for chemical reactions.

Activated alumina has the function of selectively adsorbing gas, water vapor and some liquid water. After the adsorption is saturated, it can be activated by heating at 175-315°C to remove water. After activation, the activated alumina can continue to adsorb, and the activated alumina can be activated several times. In addition to being used as a desiccant, it can also absorb oil vapor from pollution in oil such as oxygen, hydrogen, carbon dioxide, and natural gas. It can also be used as a catalyst and catalyst carrier. Activated alumina belongs to the category of chemical alumina and is mainly used for adsorption, Purifiers, catalysts and catalyst carriers. According to different product uses, raw materials and production processes are different.

Why is there such a big difference in the price of activated alumina balls in the Chinese and Indian markets? First of all, we have to analyze the raw materials. The current price of the main raw material aluminum hydroxide powder and the cost of water and electricity should generally be maintained at a cost of 1,000 US dollars per ton, and then the logistics cost, tax cost and sales profit are equal to the current The main market price of the market.

Activated alumina microspheres are in the form of white powder. In fact, the physical structure exists as spherical particles. It is used for special requirements in some fields. Activated alumina microspheres are widely used in the petrochemical industry and have been decolorized by organic solution chromatography. Used in special processes for the purpose of absorbing peculiar smell and water vapor.

 

High-performance activated alumina can bring the following benefits in the unshaped refractory ball ingredients: increase the density, fluidity, strength of the green body, increase the amount of secondary mullite, etc., and reduce the amount of water and porosity. In addition, activated alumina can also be used as a desiccant, with large water absorption, fast drying speed, and regeneration (400-500K baking).