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[Chemical Knowledge]：Properties and Uses of Industrial Sodium Hexametaphosphate

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Industrial sodium hexametaphosphate (Polyphosphate, referred to as SPP) is an important chemical raw material, widely used in food, detergent, ceramics, water treatment and other fields. This article will detail the properties and uses of industrial sodium hexametaphosphate.

1. properties

1. Chemical properties
industrial sodium hexametaphosphate is an inorganic salt with a chemical formula of Na6(P2O7)4, which is composed of six sodium ions and four metaphosphate ions. It is strongly acidic and can be quickly dissolved in water to produce metaphosphoric acid and sodium hydroxide.

2. Physical Properties
industrial sodium hexametaphosphate is usually white or yellowish crystalline powder with high hygroscopicity. It is tasteless, non-toxic, and has good thermal stability.

2. uses

1. Food additive
industry sodium hexametaphosphate is often used as a food additive in the food industry, mainly playing the following roles:
(1) improve the water retention of food: sodium hexametaphosphate has good Water retention can prevent food from losing water during processing and storage, and maintain the taste and texture of food.
(2) Adjust the pH: Sodium hexametaphosphate is acidic, which can adjust the pH value of food, inhibit the growth of microorganisms, and extend the shelf life of food.
(3) Chelated metal ions: sodium hexametaphosphate can chelate with metal ions in food to prevent metal ions from adversely affecting food.

2. Detergent builder
In industrial detergents, sodium hexametaphosphate is commonly used as an additive and has the following functions:
(1) Improve the detergency of detergents: sodium hexametaphosphate can interact with detergents The surfactant in the detergent has a synergistic effect to improve the detergency of the detergent.
(2) Anti-redeposition: Sodium hexametaphosphate can prevent dirt from being deposited on the laundry again during the washing process and improve the washing effect.

3. Ceramic additive
In ceramic production, sodium hexametaphosphate can be used as an additive to improve the performance of ceramic materials. It can play the following roles:
(1) Reduce the sintering temperature of ceramic materials: Adding sodium hexametaphosphate can reduce the sintering temperature of ceramic materials and save energy.
(2) improve the mechanical properties of ceramic materials: hexamethaphosphate can react with the components in ceramic materials to generate compounds with enhanced effect and improve the mechanical properties of ceramic materials.

4. Water treatment agent
In the field of water treatment, sodium hexametaphosphate can be used as a scale inhibitor and dispersant to prevent scaling and deposition in the water system. It can play the following role:
(1) inhibition of scale formation: six poly sodium metaphosphate can be with the water of calcium, magnesium plasma chelating reaction, to prevent the formation of scale.
(2) Dispersing suspended solids: Sodium hexametaphosphate can disperse suspended solids in water into tiny particles to prevent them from depositing in pipelines and equipment.

In short, industrial sodium hexametaphosphate as an important raw material for the production of chemicals is widely used in food, detergents, ceramics and water treatment and other fields, and plays an important role in improving product quality and production efficiency.

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