Manufacturing Method of Magnesium Carbonate
I. Overview
Magnesium carbonate is an important inorganic chemical widely used in rubber, plastics, ceramics, glass, medicine, food and other fields. It is characterized by light weight, high whiteness and stable chemical properties, and can be used as filler, modifier, catalyst and so on. In this paper, we will introduce the manufacturing methods of magnesium carbonate, including precipitation method, hydrolysis method, pyrolysis method and so on.
Two, precipitation method
Precipitation method is one of the main methods to produce magnesium carbonate, the principle is to add precipitant to the solution containing magnesium ions, so that it reacts with magnesium ions to produce magnesium carbonate precipitation, and then filtering, washing, drying and other processes to get the finished product. The specific steps are as follows:
1. Configure magnesium salt solution: configure magnesium salt such as magnesium oxide or magnesium hydroxide into a certain concentration of solution.
2. Adding precipitant: Add precipitant, such as sodium carbonate, sodium bicarbonate, etc., to the magnesium salt solution, so that it reacts with magnesium ions to generate magnesium carbonate precipitate.
3. Filtration and washing: The resulting magnesium carbonate precipitate is filtered out and washed with water.
4. Drying: Dry the cleaned magnesium carbonate precipitate to get the finished product.
3. Hydrolysis
Hydrolysis is the method of generating magnesium hydroxide by reacting magnesium metal with water and then generating magnesium carbonate by reacting it with carbon dioxide. The specific steps are as follows:
1. Add magnesium metal into water, and react to generate magnesium hydroxide and hydrogen.
2. React the generated magnesium hydroxide with carbon dioxide to generate magnesium carbonate and water.
3. The generated magnesium carbonate is filtered, washed and dried to get the finished product.
4. Pyrolysis
Pyrolysis is a method of decomposing magnesium-containing compounds by heating to produce magnesium carbonate. Specific steps are as follows:
1. Heat the magnesium-containing compounds (such as magnesium oxide, magnesium hydroxide, etc.) to a certain temperature.
2. causing it to decompose to form magnesium carbonate and gas, and discharging the gas.
3. Cool, filter, wash and dry the generated magnesium carbonate to get the finished product.
V. Precautions
1. Strictly control the parameters such as pH, temperature and concentration of the solution during the production process to ensure the quality and yield of the product.
2. Pay attention to control the temperature and time during the drying process to prevent the product from overheating or agglomeration.
3. Attention should be paid to environmental protection and safe production in the production process to avoid harming the environment and personnel.
VI.CONCLUSION
There are various manufacturing methods of magnesium carbonate, including precipitation, hydrolysis, pyrolysis and so on. In the production process, all parameters should be strictly controlled to ensure the quality and yield of the product. At the same time, attention should be paid to environmental protection and safe production to avoid harming the environment and personnel.
