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[Chemical Knowledge]：Properties and Uses of Magnesium Carbonate

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Magnesium carbonate is an important raw material widely used in the field of chemical production, with a variety of unique properties and uses. This article will detail the properties of magnesium carbonate, production methods and applications in different fields.

1. Properties of Magnesium Carbonate

Magnesium carbonate is an inorganic compound with the molecular formula MgCO3, usually a white powder or granular substance. It has the following properties:

1. physical properties: magnesium carbonate has a lower density, better dispersion and fluidity. In addition, it has low moisture absorption and can remain stable in humid environments.
2. Chemical properties: Magnesium carbonate is soluble in water, but almost insoluble in ethanol. It can react with acids to produce carbon dioxide and the corresponding magnesium salt. In addition, magnesium carbonate also has thermal stability, can be decomposed at high temperature to produce magnesium oxide and carbon dioxide.

2. magnesium carbonate production methods

magnesium carbonate production methods are mainly the following:

1. natural mineral method: through the collection of natural magnesite, dolomite and other ores, through crushing, grinding, carbonization and other processes to prepare magnesium carbonate.
2. Chemical precipitation method: the magnesium salt solution reacts with the alkaline absorbent to generate magnesium carbonate precipitate, which is filtered, dried and other steps to obtain the product.
3. Carbonization method: magnesium hydroxide or magnesium oxide is reacted with carbon dioxide to generate magnesium carbonate.

3. the use of magnesium carbonate

magnesium carbonate in the field of chemical production has a wide range of uses, the following are several major applications:

1. plastic industry: magnesium carbonate can be used as a plastic filler and reinforcing agent, improve the hardness of plastic, rigidity, heat resistance and dimensional stability. At the same time, it can also play a flame retardant effect and improve the fire resistance of plastics.
2. Rubber industry: Magnesium carbonate can be used as a rubber filler and reinforcing agent to improve the wear resistance, tear resistance and elasticity of rubber. In addition, it can also adjust the processing performance of rubber.
3. Coating industry: Magnesium carbonate can be used as a filler for coatings to improve the hiding power, leveling and weather resistance of coatings. At the same time, it can also play a role in rust prevention and extend the service life of the paint.
4. Ceramic industry: Magnesium carbonate can be used as one of the raw materials of ceramics, participate in the sintering process of ceramics, and improve the density and mechanical properties of ceramics.
5. Food industry: Magnesium carbonate can be used as a food additive to supplement the magnesium required by the human body. At the same time, it can also be used as an antacid to treat gastrointestinal diseases such as excessive gastric acid.
Precautions for
4.

When using magnesium carbonate, you need to pay attention to the following:

1. Avoid contact with strong acid to avoid violent reaction.
2. In the process of storage, should keep dry, moisture, avoid contact with flammable substances.
3. Follow the relevant safety procedures during use to avoid inhalation or contact with sensitive parts such as eyes.

In short, magnesium carbonate, as an important chemical raw material, has a wide range of applications in the fields of plastics, rubber, coatings, ceramics and food. Understanding and mastering the properties of magnesium carbonate, production methods and its application in different fields will help to improve product quality and production efficiency, and contribute to the development of chemical production.

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