The nature and basic use of sodium pyrophosphate

Physical and chemical properties of sodium pyrophosphate: white powder or crystal. Relative density 2.534, melting point 880 ℃, boiling point 93.8 ℃, specific gravity 2.534. Colorless transparent crystal or white crystal powder. Soluble in water, the solubility in 100g of water at 20 ℃ is 6.23, and its aqueous solution is alkaline. Insoluble in alcohol. The aqueous solution is still stable below 70 ℃, and will hydrolyze to disodium hydrogen phosphate upon boiling. Weathering in dry air, losing crystal water at 100 ℃. It is easy to absorb moisture in the air and deliquesce. Can form complexes with alkaline earth metal ions; White silver pyrophosphate is generated when meeting Ag+.

Basic use of sodium pyrophosphate: Electroplating industry is used to prepare electroplating solution, which can form complex with iron. Wool spinning industry is used as wool degreaser and bleaching agent. The paper industry is used for bleaching paper and plant fibers. The printing and dyeing industry is used as an assistant in printing and dyeing and fine bleaching. The daily chemical industry is used as a toothpaste additive, can form colloid with calcium hydrogen phosphate and play a stabilizing role, and can also be used for synthesizing detergents and producing shampoo paste and other products. Used as water softener in water treatment. Used as rust remover in mechanical processing. Used as dispersant and emulsifier in chemical production. It can also be used in water treatment agent, oil drilling, etc.

Sodium pyrophosphate not only has the function of softening water, but also can redissolve insoluble salts of calcium and magnesium. For example, dirt formed by insoluble calcium soap or other metal soap is mixed in clothing fibers. It can redissolve and improve the decontamination capability. In addition, sodium pyrophosphate has the function of deflocculation, which makes the grease emulsify. This is called peptization. It can also further reduce the surface tension and interfacial tension of the surfactant solution and play the role of washing aid.

Zhengzhou Yucai Phosphate Chemical Factory specializes in the production of: sodium hexametaphosphate, sodium pyrophosphate, sodium tripolyphosphate, disodium hydrogen phosphate, industrial phosphoric acid, trisodium phosphate, aluminum dihydrogen phosphate, solid aluminum dihydrogen phosphate, liquid aluminum dihydrogen phosphate, sodium dihydrogen phosphate and other phosphate series. After more than 30 years of continuous pursuit and development, Yucai Phosphate has established a good cooperation and sharing relationship with many colleges and universities through skilled chemical technology and product development, equipment renewal, and has established a brand name ( Yucai Phosphate ) in the chemical industry!