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Molecular formula: [Al₂(OH)ₙCl₆₋ₙ]. Polyaluminum chloride is a high-molecular-weight polyvalent ionic polymer coagulant—an intermediate hydrolysis product situated between aluminum trichloride and aluminum chlorohydrate. Due to the bridging effect of chloroxygen ions and the polymeric action of multivalent ions, it forms a high-molecular-weight, highly charged, high-polymer water treatment agent.
Polyaluminum chloride exhibits properties such as adsorption, coagulation, and sedimentation. However, it has poor stability and is corrosive. If it accidentally splashes onto the skin, immediately rinse it off with plenty of water. Production personnel must wear work uniforms, masks, gloves, and long rubber boots. Polyaluminum chloride boasts advantages including excellent spray-drying stability, a wide range of applicability to different water bodies, rapid hydrolysis, strong adsorption capacity, the formation of large and dense flocs, quick and efficient sedimentation, low turbidity in the effluent, and good dewatering performance.
PAC polyaluminum chloride boasts advantages such as excellent spray-drying stability, wide applicability to various water bodies, rapid hydrolysis, strong adsorption capacity, the formation of large and dense flocs, quick and efficient sedimentation, low turbidity in treated water, and excellent dewatering performance.
The basicity of polyaluminum chloride is a relatively important indicator in polyaluminum products, especially for polyaluminum products intended for drinking water applications. This parameter is one of the key indicators used to control production on polyaluminum manufacturing lines. The lower the basicity, the higher the price; therefore, different purchasers can adjust their procurement strategies based on the actual conditions of the manufacturer.
There are many methods for synthesizing polyaluminum chloride. Depending on the raw materials used, these methods can be categorized into the metallic aluminum method, the activated aluminum hydroxide method, the aluminum oxide method, the aluminum chloride method, and the alkali-soluble method, among others.
Aluminum chloride is an inorganic compound with the chemical formula AlCl₃; it is a compound of chlorine and aluminum. Aluminum chloride has a low melting point and a low boiling point, and it sublimes. It is a covalent compound. Molten aluminum chloride does not conduct electricity easily, unlike most salts containing halide ions (such as sodium chloride).
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