Sodium hydroxide (NaOH) is an extremely versatile strong base. It is used in the smelting of metals, petroleum refining, finishing of cotton fabrics, purification of coal tar products, production of paper, soap, dyes, rayon, as well as food processing, wood processing and machinery industry.

Water Treatment

Sodium hydroxide is widely used in water treatment. In sewage treatment plants, sodium hydroxide can reduce the hardness of water through neutralization reaction. In the industrial field, it is the regeneration agent for ion exchange resin regeneration. Sodium hydroxide is strongly alkaline and has relatively high solubility in water. Since sodium hydroxide has a relatively high solubility in water, it is easy to measure the dosage and can be easily used in various fields of water treatment.

Sodium hydroxide is used in water treatment for the following topics: elimination of water hardness; adjustment of water pH; neutralization of wastewater; elimination of heavy metal ions in water by precipitation; and regeneration of ion exchange resins.

Food Industry

China's "Hygienic Standard for the Use of Food Additives" (GB 2920-1996) stipulates that: it can be used as processing aids in the appropriate amount according to the production needs.

Sodium hydroxide can be widely used in the following production processes: the cleaning process of containers; the processing of starch; the preparation of carboxymethyl cellulose; sodium glutamate manufacturing process.

Paper industry

In the paper industry, the first chemical treatment is used to make pulp by cooking raw materials containing cellulose with chemicals. The so-called alkaline method of pulping is to use caustic soda solution as a cooking liquid to remove lignin, carbohydrates and resins in the raw materials, and neutralize the organic acids in them, so that the cellulose is separated out.