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[Chemical Knowledge]：Properties and uses of sodium metasilicate pentahydrate

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Sodium metasilicate pentahydrate (Sodium Metasilicate Pentahydrate) is a common raw material for chemical production, which has a wide range of properties and uses. This article will introduce in detail the properties, production methods, quality standards, safety and applications in different fields of sodium metasilicate pentahydrate.

1. properties

sodium metasilicate pentahydrate is a white crystalline powder with strong hygroscopicity. It is soluble in water and alkaline. Sodium metasilicate pentahydrate has strong adhesive ability and emulsification performance, and also has a certain corrosion inhibition effect.

2. production methods

sodium metasilicate pentahydrate production methods are mainly two: dry and wet. The dry method is to mix quartz sand, soda ash and pulverized coal in a certain proportion, calcine at high temperature, and then pulverize, screen, remove iron and other processes. The wet method is to react quartz sand and caustic soda in an autoclave to generate a sodium silicate solution, which is then concentrated, crystallized and dried.

3. Quality Standard

The quality standard of sodium metasilicate pentahydrate mainly includes appearance, main component content, pH value, water insoluble matter, heavy metal content and other indicators. Among them, the main component content is the key factor affecting its performance, and the Na2SiO3 content in sodium metasilicate pentahydrate is generally required to be not less than 98%.

4. safety

sodium metasilicate pentahydrate will cause harm to human body and environment under certain conditions. For example, inhalation of sodium metasilicate pentahydrate dust may cause respiratory irritation, and skin contact may cause allergic reactions. Therefore, in the process of production and use, it is necessary to strictly abide by the safety operation procedures, wear protective equipment, and ensure the safety of employees and the environment.

5. uses

1. detergent: sodium metasilicate pentahydrate has strong emulsifying ability and detergency, can be used as detergent for household and industrial cleaning.
2. Ceramic industry: In ceramic production, sodium metasilicate pentahydrate can be used as a binder to improve the strength and wear resistance of ceramic products.
3. Building materials: Sodium metasilicate pentahydrate can be used to produce calcium silicate board, glass fiber and other building materials to improve product performance and quality.
4. Petroleum industry: In the process of petroleum drilling, sodium metasilicate pentahydrate can be used as a mud additive to improve the stability and fluidity of the mud.
5. Paper industry: Sodium metasilicate pentahydrate can be used for paper surface treatment to improve the tensile strength and smoothness of paper.
6. Food industry: Sodium metasilicate pentahydrate can be used as a food additive to regulate food taste and improve preservation.

In short, sodium metasilicate pentahydrate, as a common raw material for chemical production, has a wide range of properties and uses. In the process of production and use, it is necessary to strictly abide by the safety operation procedures to ensure product quality and environmental safety.

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