Manufacturing method of sodium peroxide
I. 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. In this paper, the manufacturing method of sodium peroxide will be introduced in detail, including raw material preparation, reaction process, post-treatment and precautions.
II, raw material preparation
The main raw materials for manufacturing sodium peroxide are sodium metal and hydrogen peroxide. Sodium metal should be high purity lumps or granules, hydrogen peroxide concentration is generally between 30% -50%. In addition, appropriate amount of sodium hydroxide should be prepared as catalyst.
III. Reaction process
1. Cut the sodium metal into small pieces, put it into the reactor, add appropriate amount of sodium hydroxide solution, and stir well. The function of sodium hydroxide is to form a protective film on the surface of sodium metal to prevent it from being oxidized during the reaction.
2. Slowly add hydrogen peroxide solution dropwise while keeping stirring, so that the metallic sodium and hydrogen peroxide will fully contact and react. A large amount of heat will be released during the reaction, and the reaction temperature should be controlled by cooling water.
3. At the end of the reaction, filter off the unreacted sodium metal and sodium hydroxide to get sodium peroxide solution.
Four, post-processing
1. Pour the sodium peroxide solution into the crystallization kettle, heat and evaporate the water, so that the sodium peroxide crystals precipitated.
2. Centrifugal separation of sodium peroxide after crystallization, the solid sodium peroxide obtained is washed with ethanol to remove surface moisture and impurities.
3. Dry the washed sodium peroxide in vacuum drying oven to get the sodium peroxide product with high purity.
V. Precautions
1. Sodium metal is very easy to react with water, it needs to be cut and weighed in a dry environment.
2. Hydrogen peroxide has strong oxidizing property, wear protective gears during operation and avoid contact with skin.
3. The temperature should be strictly controlled during the reaction process to prevent local overheating from causing safety accidents.
4. Appropriate stirring speed should be maintained during the crystallization process to avoid too large crystalline particles affecting product quality.
6. Yield and purity
The yield and purity of this manufacturing method are affected by a variety of factors, such as the purity of raw materials, operating temperature, stirring speed and so on. In the actual production process, it should be optimized and adjusted according to the specific situation in order to improve the yield and purity. Generally speaking, the purity of sodium peroxide manufactured according to this method can reach more than 95%.
VII. Safety and environmental protection
In the manufacturing process of sodium peroxide, safety operation procedures should be strictly observed to ensure production safety. At the same time, attention should be paid to the environmental protection requirements, and the waste water and waste gas produced in the production process should be effectively treated to reduce the impact on the environment.
VIII.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, sodium peroxide products with high purity can be manufactured. In the actual production process, the process parameters should be optimized and adjusted according to the specific situation in order to improve the production efficiency and product quality.
