Aluminum Hydroxide
Aluminum Hydroxide
Aluminum hydroxide is a white powdery substance with the chemical formula Al(OH)3, also known as aluminum trihydrate. This compound is widely found in nature, especially in bauxite.
Physical and chemical properties
Aluminum hydroxide usually exists in a colloidal state. It is not very soluble in water, but can form a suspension. This suspension is often used as an antacid and mucosal protectant in medicine.
Production method
Aluminum hydroxide is produced mainly by two methods:
1. Aluminum salt hydrolysis method: aluminum hydroxide is generated by the reaction of aluminum salts such as aluminum sulfate or aluminum chloride with alkali (usually sodium hydroxide or potassium hydroxide).
2. Aluminum oxide method: aluminum hydroxide is prepared by the reaction of aluminum oxide with hydroxide.
Aluminum hydroxide is widely used in industry. In industry, aluminum hydroxide is mainly used as:
-Flame retardant: aluminum hydroxide can effectively prevent or delay the combustion of materials such as plastics and rubber.
-Catalyst carrier: due to its large surface area and good thermal stability, aluminum hydroxide is often used as a catalyst carrier.
-Papermaking industry: Aluminum hydroxide can be used as paper coating and filler to improve the whiteness and opacity of paper.
-Water treatment: Aluminum hydroxide can be used for water purification and treatment, as a flocculant to remove suspended particles in water.
Other fields
-Cosmetics: Aluminum hydroxide can be used as a thickener and emulsifier in cosmetics.
Precautions
When handling aluminum hydroxide, the following safety precautions should be taken:
-Avoid inhalation of dust, and appropriate respiratory protection equipment should be worn during operation.
-Wear appropriate protective clothing and gloves to prevent skin contact.
-Avoid contact with eyes. If it accidentally enters the eyes, rinse immediately with plenty of water and seek medical attention.
Summary
Aluminum hydroxide is a versatile compound with a wide range of applications in many fields such as industry and cosmetics. Understanding its properties and applications is essential for the proper use and management of aluminum hydroxide. When using it, follow the relevant operating guidelines to ensure the health of personnel.
