Caustic soda, also known as sodium hydroxide, is a soluble strong alkali; Soda ash (scientific name sodium carbonate) is actually a salt - due to its hydrolysis in water, the solution becomes alkaline, and it has some similar properties to caustic soda, so it is called "two alkalis" in industry along with caustic soda; Caustic soda is soluble in water, strongly alkaline, and can provide Na+ions; These properties make caustic soda widely used in various sectors such as soap making, printing and dyeing, textiles, papermaking, metallurgy, refined petroleum, and other chemical industries.
In the metallurgical industry, it is often necessary to convert the active ingredients in ores into soluble sodium salts to remove insoluble impurities - therefore, it is often necessary to add soda ash, and sometimes caustic soda is also used. In the process of aluminum smelting, the preparation of cryolite and the treatment of bauxite require the use of soda ash and caustic soda. When smelting tungsten, the concentrate and soda ash are first roasted into soluble sodium tungstate, which is then subjected to acid precipitation, dehydration, reduction and other processes to produce powdered tungsten.
In the chemical industry, caustic soda is used to produce metallic sodium and electrolyzed water. The production of many inorganic salts, especially the preparation of some sodium salts such as sodium silicate, sodium dichromate, sodium phosphate, borax, sodium sulfite, etc., requires the use of caustic soda or soda ash, and the synthesis of dyes, drugs, and organic intermediates also requires the use of caustic soda or soda ash.
The above is a brief introduction to the meaning and uses of caustic soda. We hope it can be helpful for everyone's future purchase, selection, and use!
