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[Chemical Knowledge]：Production and manufacturing method and process flow of polyaluminium chloride

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Polyaluminum chloride (PAC) is an important raw material widely used in the field of chemical production, especially in water treatment, papermaking, printing and dyeing and other industries. This article will introduce the manufacturing method of polyaluminum chloride in detail.

1. Raw Materials Preparation

The main raw materials for the manufacture of polyaluminum chloride are bauxite, hydrochloric acid and alkaline absorbent. Among them, bauxite is a mineral raw material containing alumina, hydrochloric acid is used as an acidic catalyst, and an alkaline absorbent is used to adjust the pH of the product.

2. acid dissolution and sedimentation

bauxite and hydrochloric acid are mixed in a certain proportion to carry out acid dissolution reaction. During the reaction, attention should be paid to controlling the temperature and acidity to ensure the effective dissolution of alumina. After completion of the reaction, a settling treatment was performed to separate unreacted solid impurities.

3. alkalization polymerization

in the acid solution after settling to add alkaline absorbent, so that it reacts with the aluminum ions in the solution, the formation of aluminum hydroxide precipitation. At the same time, the alkaline absorbent can also promote the polymerization of aluminum hydroxide particles to form polyaluminum chloride with a larger surface area.

4. ripening and drying

the polyaluminum chloride solution is ripened to evaporate the water and increase the solid content of the product. After completion of aging, drying treatment was performed to obtain a powdery polyaluminum chloride product.

5. product quality control

In the manufacturing process, it is necessary to strictly control the product quality of polyaluminum chloride, including testing the product's alumina content, basicity, pH and other indicators. Ensure product quality meets relevant standards.

6. environmental protection and safe production

in the production process, we need to pay attention to environmental protection and safe production. Take measures to reduce the discharge of pollutants such as waste gas, waste water and noise, and improve the efficiency of resource utilization. At the same time, strengthen the safety management of the production site to ensure the personal safety of employees. Summary of

: The manufacturing method of

polyaluminum chloride involves many links, including raw material preparation, acid dissolution and sedimentation, alkalization polymerization, aging and drying, and product quality control. In the actual production process, we need to pay attention to environmental protection and safe production, improve product quality and resource utilization efficiency. By mastering the manufacturing method of polyaluminum chloride, it can provide important raw material support for the field of chemical production and promote the development of related industries.

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