https://www.asiachmical.com/caustic-soda-plant/caustic-soda-evaporation-plant.html
Industrial caustic soda chemical equation:
2NaCl+2H₂O==电解==2NaOH+H₂↑+Cl₂↑
The positive electrode produces chlorine gas and the negative electrode produces hydrogen gas, resulting in a solution of NaOH.
Membrane electrolysis method will be the original salt after adding soda, caustic soda, barium chloride concentrate preparation to remove calcium, magnesium, sulfate ions and other impurities, and then in the clarification tank to add sodium polyacrylate or causticized bran to accelerate precipitation, sand filter after adding hydrochloric acid neutralization.
The salt water is sent to electrolysis after preheating, and the electrolyte is preheated, vaporized, divided into salt and cooled to get liquid caustic soda.
Sodium hydroxide is one of the commonly used chemicals. It is used in a wide range of industrial processes: wood pulp, paper, textiles, soaps and other detergents, as well as in household plumbing dredges.
Sodium hydroxide is strongly alkaline and hygroscopic. Soluble in water, heat release when dissolved, aqueous solution is alkaline, with a sense of greasy; Highly corrosive to fiber, skin, glass, ceramics, etc. Hydrogen is produced by reaction with aluminum and zinc, boron and silicon. Disproportionation reaction with chlorine, bromine, iodine and other halogens; Neutralizing with acids to form salts and water.
