Manufacturing Method of Barium Sulfate
Barium sulfate is an important inorganic chemical widely used in paints, plastics, ceramics, glass, medicine and other fields. In the field of raw materials for chemical production, the manufacturing method of barium sulfate has attracted much attention. In this paper, we will introduce the manufacturing methods of barium sulfate, including precipitation method, hydrothermal method, microwave method and so on.
I. Precipitation method
The precipitation method is one of the commonly used methods for manufacturing barium sulfate. The method is mainly by adding barium hydroxide solution to the sulfuric acid solution, so that it reacts to produce barium sulfate precipitation, and then the finished product is obtained through the process of filtration, washing, drying and so on. 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. Slowly add the barium hydroxide solution into the sulfuric acid solution while stirring, so that the reaction is fully carried out.
3. The reaction produces barium sulfate precipitation, which is left 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 purity of the product is low, and it needs to be washed and dried for many times to achieve higher purity.
II. Hydrothermal method
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 raw material of barium sulfate into the high-pressure reaction kettle, add appropriate amount of water, and then seal the reaction kettle.
2. heating the reaction kettle to a certain temperature and keeping it for a certain period of time, so as to make the barium sulfate raw materials fully react.
3. After the reaction, cool the reactor, take out the product, and get the finished product through the process of filtration, washing and drying.
The advantages of hydrothermal method are high purity, uniform particle size, good crystallinity, but the cost of equipment is higher and the operation is more complicated.
Third, microwave method
Microwave method is a new type of barium sulfate manufacturing method, which has the advantages of fast, high efficiency, energy saving and so on. The specific steps are as follows:
1. Mix sulfuric acid and barium hydroxide in a certain proportion to make precursor solution.
2. put the precursor solution into a microwave reactor for microwave radiation.
3. Under the action of microwave, the ions in the precursor solution move rapidly and collide and combine to form barium sulfate nuclei.
4. As the microwaves continue to act, the nuclei continue to grow and eventually form a barium sulfate precipitate.
5. The precipitate is filtered, washed and dried to obtain barium sulfate products.
The advantages of microwave method are fast reaction speed, high product purity and low energy consumption, but the equipment cost is high and professional microwave reactor is needed.
Besides the above methods, there are other methods to manufacture barium sulfate, such as sol-gel method, electrochemical method and so on. Different methods have different advantages, disadvantages and scope of application, and the selection of suitable manufacturing method needs to be considered comprehensively according to the specific product requirements and production conditions. In conclusion, there are various manufacturing methods for barium sulfate, and different methods have different advantages, disadvantages and applicable scope. When choosing the manufacturing method, it is necessary to make comprehensive consideration according to the specific product requirements and production conditions, and choose the most suitable manufacturing method.
