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[Chemical Knowledge]：Manufacturing method and process flow of barium sulfate

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Manufacturing method

of barium sulfate Barium sulfate is an important inorganic chemical product, which is widely used in paint, plastics, ceramics, glass, medicine and other fields. In the field of chemical production raw materials, the manufacturing method of barium sulfate has attracted much attention. This article will introduce the manufacturing methods of barium sulfate, including precipitation method, hydrothermal method, microwave method, etc.

1. precipitation method

precipitation method is one of the commonly used methods for the manufacture of barium sulfate. The method is mainly by adding barium hydroxide solution to sulfuric acid solution, making it react to generate barium sulfate precipitate, and then filtering, washing, drying and other processes to obtain the finished product. The specific steps are as follows:

1. add a certain concentration of sulfuric acid solution into the reaction kettle and heat it to a certain temperature.
2. The barium hydroxide solution was slowly added to the sulfuric acid solution while stirring to allow the reaction to proceed well.
3. The reaction produces barium sulfate precipitate, which is allowed to settle, then filtered, washed and dried to obtain the finished product. The advantages of

precipitation method are simple process, convenient operation and low cost, but the product purity is low, and it needs to be washed and dried many times to achieve high purity.

2. Hydrothermal method

The hydrothermal method is a chemical reaction method under high temperature and high pressure, which can be used to manufacture high-purity barium sulfate. The specific steps are as follows:

1. Add the barium sulfate raw material into the high-pressure reaction kettle, add an appropriate amount of water, and then seal the reaction kettle.
2. The reaction kettle is heated to a certain temperature for a certain period of time to make the barium sulfate raw material fully react.
3. After the reaction, the reaction kettle is cooled, the product is taken out, and the finished product is obtained by filtering, washing, drying and other processes. The advantages of

hydrothermal method are high product purity, uniform particle size, and good crystallinity, but the equipment cost is high and the operation is more complicated.

3. microwave method

microwave method is a new type of barium sulfate manufacturing method, which has the advantages of fast, high efficiency and energy saving. Specific steps are as follows:

1. sulfuric acid and barium hydroxide are mixed according to a certain proportion to prepare a precursor solution.
2. The precursor solution is placed in a microwave reactor and subjected to microwave irradiation.
3. Under the action of microwave, the ions in the precursor solution move rapidly and collide to form barium sulfate nuclei.
4. As the microwave continues to function, the crystal nucleus grows up and eventually forms barium sulfate precipitate.
5. The precipitate is filtered, washed and dried to obtain the barium sulfate product. The advantages of

microwave method are fast reaction speed, high product purity and low energy consumption, but the equipment cost is high, and a professional microwave reactor is required.

In addition to the above methods, there are other methods for manufacturing barium sulfate, such as sol-gel method, electrochemical method, etc. Different methods have different advantages and disadvantages and scope of application. Choosing a suitable manufacturing method requires comprehensive consideration according to specific product requirements and production conditions.

In short, there are many manufacturing methods for barium sulfate, and different methods have different advantages and disadvantages and scope of application. When choosing a manufacturing method, it is necessary to comprehensively consider the specific product requirements and production conditions to select the most suitable manufacturing method.

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