Polyaluminum chloride, referred to as PAC, is an inorganic polymer coagulant with the chemical formula [Al₂(OH)pClh₋1]N (n is1-5, m≤10), and its relative molecular weight is between 102.9-289.8.Polyaluminum chloride is odorless and slightly bitter in taste. The substance is light yellow, yellow-brown, powdered or granular, and can also be made into liquid forms. Common forms include powdered, granular, and liquid forms.It is easily soluble in water, and the aqueous solution is weakly acidic after dissolution, with a pH value of about 3.5-5.0, and it is insoluble in organic solvents such as ethanol and ether.It is easy to absorb moisture and agglomeration in the air, and it needs to be sealed and stored in a cool and dry place to avoid moisture from affecting the use effect.In industrial production, it is used in water treatment, papermaking, printing and dyeing, textiles, mining and other fields. It is used as a coagulant, flocculant, precipitant, and decolorizing agent. It is also used in drinking water purification, wastewater treatment, sludge dewatering and other processes.Its excellent flocculation properties can quickly adsorb suspended particles in water and form large floc sedimentation. It can efficiently purify water quality in the field of water treatment and assist in separation and purification in the industrial field. It is widely used.

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Application Description

1. Used as a core coagulant in the field of water treatment, it is used for drinking water purification and industrial wastewater treatment (such as papermaking wastewater, printing and dyeing wastewater, electroplating wastewater, etc.). It can quickly adsorb suspended particles and colloidal substances in the water, form large floc sedimentation, and remove COD, BOD, heavy metal ions and chromaticity from the water. The purification effect is significant and the cost of water treatment is reduced.
2. It is used as a gluing agent, retention aid and filter aid in the paper industry. It is used in the paper production process to improve the strength, water resistance and whiteness of the paper, reduce fiber loss, and improve paper quality. At the same time, it reduces the pollutant content of papermaking wastewater and facilitates subsequent wastewater treatment.
3. It is used as a decolorizing agent and flocculant in the printing and dyeing industry. It is used in the treatment of printing and dyeing wastewater. It can effectively remove dyes, pigments, suspended solids and harmful substances from the wastewater, reduce the chromaticity and COD value of the wastewater, and make the wastewater meet the discharge standards. At the same time, it can assist in the dyeing and fixing of textiles.
4. It is used as a flotation agent and sedimentation agent in the mining industry. It is used in the ore processing process to promote the sedimentation and separation of ore particles and improve the ore recovery rate. At the same time, it is used for the purification and treatment of mine wastewater to reduce the pollution of heavy metal ions to the environment.
5. It is used as a clarifying agent in the food industry and is used in the processing of fruit juices, beverages, beer and other products. It can remove suspended impurities and colloidal substances from the liquid, make the product clear and transparent, improve product quality, and meet food-grade safety standards at the same time.
6. Used as a finishing agent and flocculant in the textile industry, it is used in the washing of textiles and wastewater treatment. It can remove impurities and dye residues from the surface of textiles, improve the feel of fabrics, and purify textile wastewater to reduce environmental pollution.
7. In the field of sewage treatment, it is used as a sludge dewatering agent for sludge treatment in urban sewage treatment plants and industrial sewage treatment stations. It can reduce the moisture content of sludge, facilitate the transportation and disposal of sludge, improve the efficiency of sludge treatment, and reduce the space occupied by sludge stacking.
8. It is used as a chemical reagent in the laboratory, as a coagulant and precipitant, for water quality analysis, wastewater treatment experiments and other operations, and can also be used in separation and purification experiments to assist in the removal of suspended impurities and colloidal substances in the solution.