Sodium aluminate (NaAlO2) is an inorganic compound, it is also known as sodium metaaluminate or sodium alumina. It is a white or colorless solid that is soluble in water to form an alkaline solution. Sodium aluminate has a wide range of applications in industry, mainly as flocculants, corrosion inhibitors, additives in the paper industry, raw materials in the ceramic and glass industries, etc.

1. Water treatment: Sodium aluminate is an effective flocculant used to purify drinking and industrial water. It can promote the aggregation of suspended particles into larger agglomerates, which are convenient for precipitation and filtration, thereby removing impurities from the water.

2. Paper industry: In the papermaking process, sodium aluminate is used as an additive to help remove impurities in the pulp, improve the cleanliness and water filtration of the pulp, thereby improving the quality of the paper.

3. Glass and ceramic industry: Sodium aluminate is used as a flux for glass and ceramics, it can reduce the melting temperature, save energy, and help improve the properties of the final product, such as increasing transparency and strength.

4. Printing and dyeing industry: Sodium aluminate is used as a fixing agent for fabric pretreatment in the printing and dyeing industry, which can improve the adhesion of dyes and make the color more durable.

5. Cosmetics and pharmaceuticals: Sodium aluminate is used as a pH adjuster in cosmetics and may be used as an excipient in pharmaceuticals to help control the solubility and stability of drugs.

6. Paints and coatings: Sodium aluminate can be used as an additive in paints and coatings to improve their durability and adhesion.

7. Anticorrosive agent: Sodium aluminate can be used as a corrosion inhibitor on metal surfaces to form a protective film to prevent metal corrosion.

8. Fine chemicals: In the chemical industry, sodium aluminate is used as a catalyst or catalyst carrier, as well as as a reactant in some chemical synthesis processes.