What is aluminum chloride coagulant?

Polyaluminum chloride is a water purification agent; it is an inorganic polymer coagulant, commonly referred to as polyalumina, with the English abbreviation PAC. It is an inorganic polymer water treatment agent with a high molecular weight and high charge, produced through the bridging action of hydrogen and oxygen oxide ions as well as the polymerization of various anions.

Polyaluminum chloride is a new type of highly efficient inorganic polymer coagulant widely used internationally today. Its chemical formula is M. It achieves purification by destabilizing, aggregating, flocculating, coagulating, and precipitating fine suspended particles and colloidal particles in water through mechanisms such as compression of double layers, adsorption for electro-neutralization, adsorption for bridging, and trapping of precipitates. It is widely used in water supply systems for various factories such as water treatment plants and power plants (thermal power plants), as well as for the purification of industrial water. It is also employed in the treatment of industrial wastewater from factories including chemical plants, smelting plants, petrochemical plants, paper mills, printing and dyeing factories, and dye chemical plants. Its performance is superior to that of traditional low-molecular-weight inorganic salts such as aluminum sulfate and ferrous sulfate. It also has advantages such as low dosage, large floc size, and good performance in removing COD, color, and suspended solids.

PAC is a commonly used coagulant and water purification agent, and can be used as a water purification agent on its own. It is also used in combination with PAM (polyacrylamide) as a coagulant, to cause the tiny particles and impurities in water to aggregate and settle, thereby achieving the desired treatment effect.

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The mainstream chemical used for wastewater treatment is PAC, which is available in both liquid and solid forms. It generally works best when used in combination with PAM. Whether PAC should be added first or later depends on cup experiments and the particle size