What are the industrial applications of sodium meta-aluminate?
2025-04-28
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Sodium metaaluminate has a wide range of applications in industry, mainly including the following aspects:
Water purifier: hydrolysis of sodium meta-aluminate generates aluminum hydroxide colloid, which can adsorb suspended impurities in water and play the role of coagulation and sedimentation, so as to achieve the purpose of water purification, and can be used for the treatment of drinking water and industrial water.
Paper industry: used in paper sizing. It can combine with cellulose in paper to form a protective film on the surface of paper, effectively improve the water resistance and strength of paper, and improve the quality and performance of paper.
Chemical raw material: it is an important intermediate for the preparation of many kinds of aluminum compounds. By reacting with different acids, aluminum salts such as aluminum hydroxide, aluminum chloride and aluminum sulfate can be prepared. In petrochemical industry, sodium meta-aluminate can be used as a carrier for catalysts, providing a large specific surface area and suitable pore structure for catalysts, which helps to improve the activity and stability of catalysts, thus it is widely used in all kinds of catalytic reactions.
Construction industry: It is used in the preparation of quick-drying cement and waterproofing agent. In cement production, the addition of sodium meta-aluminate can significantly shorten the setting time of cement and improve the early strength of cement, making it more suitable for some projects that require construction speed. At the same time, sodium meta-aluminate can also be used in the preparation of waterproofing agents to enhance the waterproof performance of buildings.
Metal Processing: In the process of metal surface treatment, sodium meta-aluminate solution can be used as an alkaline cleaning agent, capable of removing oil, oxidized skin and other impurities on the metal surface, providing good surface conditions for the subsequent electroplating, painting and other processes. In addition, it can be used for etching and chemical polishing of aluminum and aluminum alloys, which helps to improve the finish and precision of metal surfaces.
Printing and dyeing industry: Used as a mordant, it helps dyes adhere better to fabrics, improves dyeing effect, and makes dyeing more even and firm.
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