Aluminium Hydroxide

Aluminium Hydroxide
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  • Aluminium trihydrate
  • 2818.30.00
  • Al(OH)3
  • White Powder or Colorless Crystals
  • 21645-51-2
  • Aluminium(III) Trihydroxide, Hydrated alumina
  • 400 @ 50 kg HDPE woven bags
    20 MT/ 20'FCL
    400 @ 50 kg PP Woven Bag
    20 MT / 20'FCL
    500 @ 40 kg PP woven bag with PE coating
    20 MT /20'FCL
Grade Origin Download
Taiwan
TDS MSDS
Turkey
TDS MSDS
0.995
India
TDS MSDS

Brief Overview

Aluminium hydroxide, commonly known as hydrate of alumina, Al(OH)3, is an odourless, white crystalline powder. This substance is stable at standard conditions and is insoluble in water. Aluminium hydroxide is widely known as a material for flame retardant because it can decompose into water and alumina at 200°C. Aluminium hydroxide is also an amphoteric material, it can be base or acid depending on the condition of the solution. It is usually used for the manufacturing of aluminium, fire retardant, and pharmaceuticals. It is also used in the catalytic industry, paper industry, ceramic industry, printing industry and etc.

 

Manufacturing Process

In 1887, Carl Josef Bayer invented the Bayer Process. He discovered how to separate alumina from bauxite more efficiently. Firstly, bauxite is to be mixed with a hot solution of sodium hydroxide, NaOH. The addition of sodium hydroxide solution causes the precipitation of alumina. Alumina precipitate is then cooled and the resulting solution is calcinated and processed to give Al2O3.

Intermediate Chemicals

Aluminium hydroxide is the basic material for many other aluminium compounds. In industries, it is added to cement to facilitate the drying. It is also used for the production ceramic and glass as it can increase the melting point of glass. When aluminium hydroxide is combined with a polymer, the newly made material will gain fire retardant properties.

 

Paper Industry

Aluminium hydroxide acts as an extender and bodying agent in the manufacturing of paper. It is used as a filler in paper as it disperses readily and retains for a long time during manufacturing. It is also used as a paper coating agent in the paper industry.

 

Pharmaceutical Industry

In the pharmaceutical industry, aluminium hydroxide that combines with magnesium hydroxide is used for neutralising acids. It can also help to increase our immune system and also preparing vaccines to combat tetanus, Hepatitis A, and Hepatits B. 

 

Metal Industry

Aluminium oxide is important for the manufacturing of pure aluminium metal via the Hall-Héroult process. The Hall-Héroult process involves dissolving aluminium oxide in molten cryolite, and electrolysing the molten salt bath at 940–980°C, giving a 99.5% - 99.8% yield of pure aluminium.

 

Other Applications

Aluminium hydroxide is used to make waterproof cloth, is involved in water purification, and acts as a binding agent for fine paper, chromatography, ink industry, and etc. Aluminium Hydroxide is very stable so it can also be used in cosmetics ingredients.

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