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What Is The Use Of Sodium Hexametaphosphate
- Aug 21, 2018 -

Properties:

  1. Melting point 616 ° C (decomposition), relative density 2.484 g / cm 3 (20 ° C), soluble in water, insoluble in organic solvents. Colorless transparent glass flakes or white granular crystals. It is very hygroscopic and can be absorbed into the air to gradually absorb moisture and become a viscose. It can form soluble complexes with metal ions such as calcium and magnesium.

  2. The neutralization reaction is carried out by the soda ash or caustic soda solution with phosphoric acid. After completion, the mixture is further heated to 250 ° C to form sodium metaphosphate, and then heated to 620 ° C to melt and polymerize the crystal, which is obtained by quenching (granulation). The food grade sodium hexametaphosphate needs to be purified by arsenic removal and heavy metal removal after the neutralization reaction is completed, and then heated and baked. Used in the manufacture of water treatment agents, corrosion inhibitors, metal surface treatment agents, cement hardening accelerators, coated paper pulp diffusion agents and oil drilling. Food grade, mainly used as quality improver, chelating agent, fermenting leavening agent, pH adjuster, etc.