Polyaluminium chloride

Polyaluminum chloride, often abbreviated PAC, is a chemical compound containing aluminum and chlorine. It is mainly used as a coagulant in the treatment of drinking water and industrial wastewater. Here are a few details on this compound:

• Chemical formula: Aluminum polychloride has no fixed chemical formula, being a complex mixture of aluminum and chlorine compounds. Its approximate chemical formula can generally be represented as AlnCl(3n-m)(OH)m, where n is the number of aluminum groups and m is the number of hydroxide (OH) groups.
• Appearance: Aluminum polychloride is generally available as white or yellowish powder or flakes, although color may vary according to its specific composition.
• Uses: It is mainly used as a coagulating and flocculating agent in water treatment. When added to water, it forms solid precipitates that absorb impurities and suspended particles, aggregating them into larger flakes that can be easily removed by filtration. It is also used in the paper and textile industries.
• Chemical reaction: In solution, aluminum polychloride reacts with impurities present in water, forming flocs that can be removed. The chemical reaction can be complex and depends on the specific composition of the aluminum polychloride.
• Safety: Like any chemical product, aluminum polychloride must be handled with care. It can be irritating to the skin, eyes and respiratory tract. Workers must wear appropriate protective equipment when handling it.
• Environment : The use of aluminum polychloride in water treatment must be regulated to avoid environmental pollution. Residues from the coagulation-flocculation process must be properly disposed of to prevent contamination of water and soil.
• Type: This is an inorganic compound containing aluminum and chlorine. Depending on its specific composition, it may vary in terms of the proportions of aluminum and chlorine, as well as the presence of hydroxide groups.
• Color: Aluminum polychloride is generally available as white or yellowish powder or flakes. The color can vary according to its composition and degree of purity, ranging from white to light yellow. The yellow color is often the result of the presence of traces of impurities. Precise color may vary according to supplier and storage conditions.