[Chemical Knowledge]：The nature, use, upstream and downstream raw materials, storage methods of barium sulfate, does barium sulfate have any special meaning

Barium Sulfate Properties

Chemical Properties Barium sulfate (BaSO4) is an inorganic compound with the molecular formula BaSO4 and a molecular weight of 233.39g/mol. Barium sulfate is a white powder with a density of 4.5g/cm³ and a melting point of 1580°C. It is almost insoluble in water, the solubility is only 1.15 mg/L (25°C), and it is also insoluble in acid or alkali, and has extremely strong chemical stability.

Physical Properties Barium sulfate has excellent physical properties, including high density, high hardness, good optical properties and thermal stability. Its refractive index is 1.64, and it has excellent hiding power and gloss. It also has good dispersibility and chemical inertness, and can remain stable under high temperature conditions.

Barium sulfate uses

Coatings and paints Barium sulfate is widely used in the coatings and paint industry due to its excellent hiding power and gloss. It can be used as a white pigment to provide high hiding power and a smooth surface effect. Barium sulfate can also improve the weather resistance and aging resistance of the coating and extend the service life of the coating.

Plastic and rubber In the plastics and rubber industry, barium sulfate is used as a filler. It can not only improve the density and hardness of plastic and rubber, but also improve the aging resistance and wear resistance of products. Due to its excellent dispersibility, barium sulfate can be evenly distributed in the plastic and rubber matrix to improve the overall performance of the material.

medical field Barium sulfate is mainly used as an X-ray contrast agent in the medical field. Because barium sulfate is insoluble in water and has a high density, it can show clear images under X-rays, which helps doctors perform digestive system examinations, such as gastrointestinal imaging.

Other applications Barium sulfate is also used in papermaking, ceramics, electronics and other fields. In the paper industry, it is used as a smoothing agent and filler for paper; in the ceramic industry, as an additive for glazes and glazes; in the electronics industry, as a filling material for capacitors, transistors and integrated circuits.

Barium sulfate upstream and downstream raw materials

Upstream raw materials The production of barium sulfate mainly depends on the extraction and processing of natural ore barite (BaSO4). Barite is a common sulfate mineral whose main component is barium sulfate. The production of barium sulfate also requires sulfuric acid (H2SO4) as an important reagent in chemical reactions for extraction and purification processes.

Downstream Products The downstream products of barium sulfate are mainly industrial products, including coatings, plastics, rubber products and pharmaceutical contrast agents. These products are widely used in construction, automobile, electronics, medical and other fields, and have an important impact on the development of social economy.

Barium sulfate storage method

Moisture-proof storage Due to the low hygroscopicity of barium sulfate, but in order to ensure its quality and use effect, it should be stored in a dry environment to avoid contact with moisture. The use of moisture-proof packaging materials such as plastic bags, sealed containers, etc., can effectively prevent it from moisture.

Anti-pollution storage Barium sulfate should be stored in a clean environment to avoid mixing with other chemicals to prevent pollution and chemical reactions. In particular, avoid contact with acidic or alkaline substances to prevent chemical changes affecting its performance.

suitable temperature Barium sulfate has good thermal stability, but it is still necessary to avoid extreme temperature conditions during storage. It is recommended to keep the storage temperature within the normal temperature range, avoid direct sunlight and high temperature environment to prevent changes in its physical properties.

Secure Storage Although the chemical properties of barium sulfate are stable, it is still necessary to pay attention to safety during storage and transportation. It should be stored in a well-ventilated warehouse to avoid open flames and high temperature environments to prevent material leakage and pollution caused by packaging damage or accidents.

Barium Sulfate Production and Market Prospects

Production process There are two main methods for the production of barium sulfate: one is the mechanical grinding method of natural barite ore, the barite ore is crushed, ground and classified to obtain barium sulfate; the other is the chemical precipitation method, through sodium sulfate (Na2SO4) and barium chloride (BaCl2) reaction to generate barium sulfate precipitation, and then filtered, washed and dried to obtain the product. The two methods have their own advantages and disadvantages. The mechanical grinding method has low cost and is suitable for large-scale production; the chemical precipitation method has high product purity and is suitable for high-demand applications.

market demand With the growing demand for barium sulfate in various industries, especially in the fields of coatings, plastics, rubber and medicine, the market for barium sulfate is promising. With the acceleration of industrialization and the improvement of scientific and technological level, the application prospect of barium sulfate in new materials, new energy and other fields is also very considerable. The increasingly stringent environmental protection policies have promoted the research and development of high-purity, low-pollution barium sulfate products and market demand.

Environmental and health impacts

Environmental impact Barium sulfate widely exists in nature, as the main component of mineral barite, has good environmental compatibility. In the process of mining and processing, attention should be paid to environmental protection to prevent the destruction of the ecological environment and dust pollution caused by mining. Barium sulfate itself is chemically stable and non-toxic and harmless to the environment, but the waste water and waste residue generated in the production process need to be properly treated to avoid pollution to water and soil.

Health effects Barium sulfate is widely used in medical contrast agents, indicating its high safety to human body. It is not absorbed and metabolized in the body and is excreted in its original form after passing through the digestive tract. Long-term exposure to a large amount of barium sulfate dust may have a certain impact on the respiratory system, and corresponding protective measures should be taken. In the process of production and use, personal protection should be paid attention to avoid inhalation of dust and skin contact.

Conclusion

As an important chemical raw material, barium sulfate has a wide range of applications and good market prospects. Its excellent physical and chemical properties make it occupy an important position in coatings, plastics, rubber, medicine and other industries. The production and use of barium sulfate has little impact on the environment and health, but it is still necessary to pay attention to environmental protection and safety protection during mining, processing and storage. With the progress of science and technology and the continuous growth of industrial demand, the application potential of barium sulfate in the field of new materials and new energy is huge, and the future development prospect is promising.