Physicochemical properties and uses of sodium metaaluminate
2025-04-28
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Physical and chemical properties
Properties: white granule or powder, hygroscopicity.
Melting point: 1650°C.
Solubility: easily soluble in water, its aqueous solution is strongly alkaline, insoluble in ethanol and ether.
Uses
Water treatment: Sodium meta-aluminate can be used as a water purifier to treat drinking water and industrial water. The aluminum hydroxide colloid produced by its hydrolysis in water can adsorb the suspended impurities in water and make the water become clear.
Paper industry: used in paper sizing, it can be combined with cellulose in paper to form a protective film and improve the water resistance and strength of paper.
Chemical raw materials: it is an important raw material for the preparation of other aluminum compounds, such as aluminum hydroxide and aluminum chloride can be prepared by reacting with acid. In addition, in the petrochemical industry, it can also be used as a carrier for catalysts, which helps to improve the activity and stability of catalysts.
Construction industry: It is used in the preparation of quick-drying cement, waterproofing agent and other construction materials. Adding sodium meta-aluminate to cement can shorten the setting time of cement and improve the early strength of cement.
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Chuangzhi Valley, Guoli Town, Huantai County, Zibo City, Shandong Province