[Chemical Knowledge]：Properties, uses, upstream and downstream raw materials, storage methods, and scope of action of polyaluminium chloride

Polymeric aluminum chloride properties

Polyaluminum chloride (PAC,Polymeric Aluminum Chloride) is an inorganic polymer compound, mainly aluminum hydroxide and aluminum chloride as raw materials, made by polymerization. Its molecular formula is generally expressed as [Al n(OH) mCl_{3n-m}], where the values of n and m determine its chemical nature and performance. PAC is usually yellow or light yellow solid form, soluble in water, with strong electrolyte properties and high colloidal stability. Its pH is generally between 3.5 and 5.0, showing acidity.

Polymeric aluminum chloride use

Polyaluminium chloride is widely used in the field of water treatment, mainly for the purification of drinking water and wastewater. The principle of its action is through the electric neutralization and adsorption bridging action, so that the water suspended solids, colloids, bacteria and other impurities to form a larger floc, which is easy to settle and filter. In addition, PAC is also used as a precipitant and retention aid in papermaking, printing and dyeing, tanning and other industries, which can improve the efficiency of the production process and the quality of the product. In agriculture, PAC can be used as a soil conditioner to improve soil structure and fertility.

Polyaluminum chloride upstream and downstream raw materials

The production process of polyaluminum chloride mainly involves the upstream raw materials aluminum hydroxide and aluminum chloride. These raw materials are usually obtained by chemical synthesis or mineral extraction. Aluminum hydroxide is generally extracted from bauxite by the Bayer process, while aluminum chloride can be produced by reacting aluminum with chlorine or aluminum ore with hydrochloric acid. In the production process, aluminum hydroxide and aluminum chloride need to be mixed according to a certain ratio, and polymerization reaction is carried out under specific temperature and pressure conditions to generate polyaluminum chloride.

Downstream, the main application areas of polyaluminium chloride are water treatment plants, paper mills, printing and dyeing plants and other industrial enterprises. These companies have a high demand for PAC, especially those industries with strict water quality requirements, such as drinking water purification and high-purity industrial water treatment. The agricultural sector and environmental engineering projects are also important downstream users.

POLYALUMINUM CHLORIDE STORAGE METHOD

Polyaluminium chloride should be stored in a dry, ventilated and cool warehouse, avoiding direct sunlight and high temperature environment. Solid PAC should be sealed to prevent moisture and contamination; liquid PAC should be stored in a corrosion-resistant container and checked regularly for tightness. Avoid contact with alkaline substances during storage to prevent chemical reactions. Since PAC is corrosive to a certain extent, it should be protected during storage and transportation to avoid direct contact with skin and eyes. Operators should wear protective gloves and goggles.

POLYALUMINUM CHLORIDE MARKET PROSPECT

With the increasingly serious problems of global water resources, the demand of water treatment industry is increasing, which brings huge development space for polyaluminum chloride market. Especially in emerging economies, with the acceleration of industrialization and urbanization, the demand for sewage treatment and industrial wastewater treatment is growing rapidly, driving the market demand for PAC. The increasingly stringent environmental regulations have also prompted companies to increase the use of high-efficiency water purification agents, further promoting the development of the PAC market.

Polyaluminum Chloride Environmental Benefits

The application of polyaluminum chloride in water treatment not only effectively improves the water quality, but also reduces the use of traditional flocculants such as aluminum sulfate, and reduces the amount of sludge generated in the water treatment process and the treatment cost. The flocs formed by PAC in the water treatment process are easy to dewater and treat, reducing the risk of secondary pollution. These advantages make PAC of great significance in the field of environmental protection and become one of the preferred materials for all kinds of water treatment projects.

Conclusion

Polyaluminum chloride with its unique chemical properties and a wide range of applications, occupies an important position in modern industry and environmental protection. Its production process involves complex chemical reactions, and the upstream and downstream industrial chains are closely linked. In the process of storage and use, the relevant specifications must be strictly followed to ensure its effectiveness and safety. With the global emphasis on environmental protection and water resources management, the market prospect of polyaluminum chloride is broad, and it will play a more important role in water treatment, industrial production and agriculture in the future.