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[Chemical Knowledge]：Manufacturing method and process flow of sodium peroxide

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The manufacturing method
of sodium peroxide
1. Introduction

Sodium peroxide is an important inorganic chemical, widely used in bleaching, oxidation, disinfection and other fields. Mastering the manufacturing method of sodium peroxide is of great significance to chemical production. This article will introduce the manufacturing method of sodium peroxide in detail, including raw material preparation, reaction process, post-treatment and precautions.

2. Raw Material Preparation

The main raw materials for the manufacture of sodium peroxide are metal sodium and hydrogen peroxide. Sodium metal should be high purity block or granular, hydrogen peroxide concentration is generally between 30%-50%. In addition, it is necessary to prepare an appropriate amount of sodium hydroxide as a catalyst.

3. reaction process

1. will metal sodium cut into small pieces, into the reaction kettle, adding the right amount of sodium hydroxide solution, stirring. The role of sodium hydroxide is to form a protective film on the surface of sodium metal to prevent sodium metal from being oxidized during the reaction.
2. The hydrogen peroxide solution is slowly added dropwise while maintaining stirring, so that the metal sodium and hydrogen peroxide are fully contacted and reacted. A large amount of heat is released during the reaction, and the reaction temperature needs to be controlled by cooling water.
3. After completion of the reaction, unreacted metallic sodium and sodium hydroxide were filtered off to obtain a sodium peroxide solution.

4. post-treatment

1. will be sodium peroxide solution into the crystallization kettle, heating evaporation of water, sodium peroxide crystal precipitation.
2. The crystallized sodium peroxide is centrifuged and the obtained solid sodium peroxide is washed with ethanol to remove surface moisture and impurities.
3. The washed sodium peroxide is dried in a vacuum drying oven to obtain a sodium peroxide product with high purity.

5. Precautions

1. Sodium metal is very easy to react with water and needs to be cut and weighed in a dry environment.
2. Hydrogen peroxide has strong oxidation, operation should wear protective equipment, avoid contact with the skin.
3. The temperature should be strictly controlled during the reaction to prevent local overheating from causing safety accidents.
4. During the crystallization process, proper stirring speed should be maintained to avoid too large crystal particles affecting product quality.

6. Yield and Purity

The yield and purity of the present manufacturing process are affected by various factors, such as the purity of the starting materials, the operating temperature, the stirring speed, etc. In the actual production process, optimization and adjustment should be made according to the specific situation to improve the yield and purity. In general, the purity of sodium peroxide produced by this method can reach 95% or more.

7. safety and environmental protection

in the manufacturing process of sodium peroxide, should strictly abide by the safety operation procedures to ensure production safety. At the same time, attention should be paid to environmental protection requirements, and the waste water and waste gas generated in the production process should be effectively treated to reduce the impact on the environment.

8. conclusion

This paper introduces the manufacturing method of sodium peroxide, including raw material preparation, reaction process, post-treatment and precautions. By mastering the appropriate manufacturing process and operation method, high purity sodium peroxide products can be produced. In the actual production process, the process parameters should be optimized and adjusted according to the specific situation to improve production efficiency and product quality.

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