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[Chemical Knowledge]：Manufacturing method and process flow of magnesium oxide

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The manufacturing method
of magnesium oxide
1. Introduction

Magnesium oxide is an important inorganic chemicals, widely used in ceramics, electronics, medicine, environmental protection and other fields. With the continuous development of science and technology, the manufacturing method of magnesium oxide has been continuously improved and optimized. This article will introduce the manufacturing methods of magnesium oxide, including precipitation method, hydrolysis method, gas phase method, etc., and analyze the advantages and disadvantages of various methods to provide reference for actual production.

2. precipitation method

precipitation method is a common magnesium oxide manufacturing method, its principle is to add a precipitant to the solution containing magnesium ions, so that magnesium ions precipitate, through filtration, washing, drying and other steps to obtain magnesium oxide products. Commonly used precipitants include sodium hydroxide, ammonia, etc. The advantages of

precipitation method are simple process and convenient operation, and high purity magnesium oxide products can be obtained. However, this method also has some disadvantages, such as large consumption of precipitant, high production cost, and the waste liquid generated needs to be treated, and the environmental protection pressure is high. The

3. hydrolysis method
the
hydrolysis method is a method in which magnesium hydroxide is produced by reacting metallic magnesium with water, followed by calcination to obtain magnesium oxide. The specific steps are as follows: adding metal magnesium into water, reacting to generate magnesium hydroxide precipitate, filtering, washing and drying the precipitate, and finally calcining at high temperature to obtain magnesium oxide. The advantages of

hydrolysis method are that high-purity magnesium oxide products can be obtained, and the generation of waste liquid is avoided, and the environmental protection is better. However, the production cost of this method is high, and a large amount of energy and water resources are consumed.

4. gas phase method

gas phase method is a method for preparing magnesium oxide through gas phase reaction. Its principle is to introduce metal magnesium vapor and oxygen into the reactor and react to form magnesium oxide under high temperature and high pressure. The advantages of

gas phase method are high product purity, uniform particle size distribution, continuous production and high production efficiency. However, the equipment investment of this method is large, and the production cost is high.

5. other methods

In addition to the above methods, there are some other magnesium oxide manufacturing methods, such as sol-gel method, microwave method, etc. These methods have their own advantages and disadvantages, and can be selected according to the specific production needs and conditions.

6. Conclusion There are many manufacturing methods for

magnesium oxide, and each method has its advantages and disadvantages and scope of application. In actual production, the appropriate manufacturing method should be selected according to the purity of the product, particle size distribution, production cost and other factors. At the same time, with the continuous progress of science and technology and the improvement of environmental awareness, the development of more environmentally friendly, efficient and economical magnesium oxide manufacturing methods is also the future development trend.

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