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

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The manufacturing method
of barium carbonate
1. Introduction

barium carbonate is an important inorganic chemicals, widely used in glass, ceramics, electronics, medicine and other fields. This article will introduce the manufacturing method of barium carbonate, including raw material preparation, reaction process, post-treatment and other process steps, aiming to provide readers with comprehensive knowledge of barium carbonate production.

2. Raw Material Preparation

1. Carbonate: Sodium carbonate or potassium carbonate can be used as carbonate raw material, and its purity should be higher than 98%.
2. Barium hydroxide: choose high purity barium hydroxide to ensure the quality of the final product.
3. Water: Use deionized water to avoid introducing impurities.

3. reaction process The manufacture of

barium carbonate is mainly completed through the following chemical reactions:

Ba(OH)2 + Na2CO3 → BaCO3 ↓ +2NaOH

1. Add barium hydroxide into deionized water to make barium hydroxide solution, the concentration is generally 10-20%.
2. Add sodium carbonate to deionized water to make sodium carbonate solution, the concentration is generally 10-15%.
3. Under the condition of stirring, the sodium carbonate solution is slowly dropped into the barium hydroxide solution, and the dropping speed is controlled, so that the reaction is fully carried out.
4. the reaction process will produce white precipitate, namely barium carbonate. At the same time, sodium hydroxide solution is produced, which can be recovered as a by-product.

4. work-up

1. Filtration: After the end of the reaction, the barium carbonate precipitate and the sodium hydroxide solution were separated by filtration.
2. Washing: The barium carbonate precipitate was washed several times with deionized water to remove impurities attached to the surface.
3. Drying: The washed barium carbonate precipitate is dried, generally by oven drying or vacuum drying.
4. Crushing: The dried barium carbonate is crushed and sieved according to requirements to obtain products with different particle sizes.

5. precautions

1. Strictly control the purity of raw materials to avoid the introduction of impurities.
2. During the reaction, an appropriate stirring speed should be maintained to ensure uniform reaction.
3. Keep the operation standard during the filtration and washing process to avoid loss of product.
4. Control the temperature and humidity during the drying process to prevent product agglomeration or deterioration.

6. conclusion The manufacturing method of

barium carbonate mainly includes raw material preparation, reaction process and post-treatment and other process steps. By controlling the purity of raw materials, stirring speed, filtration and washing operation and drying conditions, high purity barium carbonate products can be produced.

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