Polymerized aluminum chloride (PAC) is an important raw material widely used in the field of chemical production, especially in water purification treatment, paper making, printing and dyeing industries have an important role. This article will introduce the manufacturing method of polymeric aluminum chloride in detail.
I. Raw material preparation
The main raw materials for manufacturing polymeric aluminum chloride are bauxite, hydrochloric acid and alkaline absorbent. Among them, bauxite is a mineral raw material containing alumina, hydrochloric acid is used as an acid catalyst, and alkaline absorbent is used to adjust the pH of the product.
II. Acid dissolution and sedimentation
Mix bauxite and hydrochloric acid according to a certain proportion and carry out acid dissolution reaction. In the reaction process, attention needs to be paid to controlling the temperature and acidity to ensure the effective dissolution of alumina. After the completion of the reaction, the settlement process is carried out to separate out the unreacted solid impurities.
Third, alkaline polymerization
Add alkaline absorbent to the acid solution after settling, so that it reacts with the aluminum ions in the solution to produce aluminum hydroxide precipitate. At the same time, the alkaline absorbent can also promote the polymerization of aluminum hydroxide particles to form polymerized aluminum chloride with a large surface area.
Four, ripening and drying
The polymerized aluminum chloride solution is ripened to evaporate the water and improve the solid content of the product. After maturation is completed, drying treatment is carried out to get powdered polymerized aluminum chloride products.
V. Product quality control
In the manufacturing process, the product quality of polymerized aluminum chloride needs to be strictly controlled, including testing the product's alumina content, salinity, acidity and alkalinity and other indicators. Ensure that the product quality meets the relevant standards.
Sixth, environmental protection and safe production
In the production process, it is necessary to pay attention to environmental protection and safe production. Take measures to reduce the emission 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:
The manufacturing method of polymerized aluminum chloride involves a number of links, including raw material preparation, acid dissolution and sedimentation, alkaline polymerization, maturation and drying, and product quality control. In the actual production process, it is necessary to pay attention to environmental protection and safe production, and improve product quality and resource utilization efficiency. By mastering the manufacturing method of polymerized aluminum chloride, it can provide important raw material support for the field of chemical production and promote the development of related industries.
