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[Chemical Knowledge]：Production and manufacturing method and process flow of barium hydroxide

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of the manufacturing method
of barium hydroxide Barium hydroxide is an important inorganic chemical raw material, which is widely used in chemical industry, metallurgy, medicine, environmental protection and other fields. This article will introduce the manufacturing method of barium hydroxide, including raw material preparation, reaction process, post-treatment and precautions.

1. Raw Material Preparation

The main raw materials for the manufacture of barium hydroxide are barium carbonate and sodium hydroxide. Barium carbonate should be white powder, no impurities, the content of more than 98%. Sodium hydroxide shall be white flake or granular solid with purity above 96%. In addition, it is also necessary to prepare a certain amount of deionized water as the reaction medium.

2. reaction process

1. barium carbonate and deionized water according to a certain proportion of the reaction kettle, stirring evenly, made of suspension.
2. in the stirring state, slowly add sodium hydroxide solution, control the speed of alkali, so that the reaction temperature does not exceed 60.
3. A large amount of carbon dioxide gas will be generated during the reaction process. The reaction kettle should be kept well ventilated and the gas should be discharged in time.
4. After completion of the reaction, unreacted barium carbonate precipitate was removed by filtration to obtain a barium hydroxide solution.

3. post-treatment

1. Add an appropriate amount of activated carbon to the barium hydroxide solution, stir evenly, and let stand for a period of time to absorb the colored impurities in the solution.
2. The activated carbon was filtered off, and the filtrate was concentrated under vacuum to obtain a barium hydroxide concentrate.
3. The concentrated solution was cooled to room temperature to precipitate barium hydroxide crystals.
4. The crystals were collected by filtration, washed with a small amount of deionized water, and dried to give a finished product of barium hydroxide.

4. precautions

1. Pay attention to safety during operation and avoid contact with alkaline substances and carbon dioxide gas.
2. During the reaction, the speed of adding alkali should be strictly controlled to prevent local excessive concentration of barium carbonate precipitation and affect product quality.
3. The equipment should be kept clean during the post-treatment process to avoid the introduction of impurities.
4. The finished product should be stored in a dry and cool place to avoid contact with acidic substances.

In short, the manufacturing method of barium hydroxide requires knowledge of raw material preparation, reaction process, post-treatment and precautions. By strictly controlling operating conditions and strengthening equipment maintenance, high-quality barium hydroxide products can be manufactured to provide a stable supply of raw materials for chemical production.

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