[Chemical Knowledge]：Properties, uses, upstream and downstream raw materials, storage methods of petroleum naphthalene, naphthalene oil fractions

Properties of petroleum naphthalene

Petroleum naphthalene is an aromatic hydrocarbon extracted from petroleum with the chemical formula C10H8. It is a colorless or white crystalline solid with a strong aromatic odor. Petroleum naphthalene has good thermal stability and chemical stability, and is not easy to decompose. It has a melting point of 80.26°C and a boiling point of 218°C. It is not volatile at room temperature, but it has a certain degree of volatility at high temperatures. Petroleum naphthalene is insoluble in water, but soluble in most organic solvents such as alcohol, ether, benzene, etc.

Petroleum naphthalene use

Petroleum naphthalene is widely used in chemical industry. It is an important raw material for the production of phthalic anhydride, which is an important intermediate for the manufacture of plastic plasticizers, resins, dyes and other products. Petroleum naphthalene is also the basic raw material for the production of pesticides and insecticides. Petroleum naphthalene is also used in the synthesis of naphthalene series water reducing agent, which is widely used in construction projects to improve the fluidity and strength of concrete. Petroleum naphthalene derivatives, such as naphthol and naphthoquinone, also have important applications in the fields of dyes, pharmaceuticals and fragrances.

Petroleum naphthalene upstream feedstock

The production of petroleum naphthalene mainly depends on the by-product of petroleum refining process-heavy aromatics fraction. The heavy aromatic fraction is treated by catalytic cracking, hydrocracking and other processes to extract high purity naphthalene. Coal tar is also one of the important raw materials for the production of petroleum naphthalene. Coal tar after distillation, extraction and other processes, can be separated from the higher purity of naphthalene. With the increasingly stringent environmental regulations, modern processes are gradually developing in a more environmentally friendly and efficient direction, such as the use of green solvents and catalysts for production.

Petroleum naphthalene downstream products

The downstream products of petroleum naphthalene are very diversified. Its most important downstream product is phthalic anhydride, which can be further processed into various plasticizers, such as dioctyl phthalate (DOP), dibutyl phthalate (DBP), etc. These plasticizers are widely used in plastic products to improve their flexibility and durability. Another important downstream product is naphthalene water reducing agent, which has significant water saving and enhancement effect in concrete engineering. Petroleum naphthalene derivatives, such as naphthol, naphthoquinone, etc., in the dye, medicine, perfume and other industries also have important applications, such as naphthol can be used for the synthesis of naphthol dyes and antioxidants, naphthoquinone in the synthesis of dyes and medicine as an important intermediate.

Petroleum naphthalene storage method

Because petroleum naphthalene has a certain volatility and toxicity, its storage requires special attention to safety. Petroleum naphthalene should be stored in a cool, dry, well-ventilated warehouse, avoid direct sunlight and high temperature environment to prevent its volatilization and deterioration. Storage containers should be well sealed to prevent leakage and away from ignition and heat sources. Petroleum naphthalene should be stored separately from chemicals such as oxidants and acids to prevent chemical reactions. During storage and transportation, workers should wear protective equipment to prevent petroleum naphthalene from causing harm to the human body, such as skin irritation and respiratory problems.

Market Analysis and Prospects

As an important raw material in the chemical industry, the market demand for petroleum naphthalene is growing with the development of downstream industries. In recent years, with the development of construction industry and automobile manufacturing industry, the demand for plastic plasticizer and concrete admixture has increased significantly, which has led to the prosperity of petroleum naphthalene market. Increasingly stringent environmental regulations also encourage companies to continuously improve production processes, reduce pollution, and improve product quality and production efficiency. In the future, with the application of new technologies and changes in market demand, the petroleum naphthalene market will continue to grow steadily. Enterprises should focus on technological innovation and environmental protection investment to adapt to market demand and regulatory requirements and enhance competitiveness.

Conclusion

As an important chemical raw material, petroleum naphthalene has a wide range of applications and good market prospects. Its upstream raw materials mainly come from petroleum and coal, and high purity naphthalene is obtained through a variety of processes; downstream products cover plastic plasticizers, concrete water reducing agents, dyes, pharmaceuticals and other fields. In order to ensure safety and quality, the storage of petroleum naphthalene needs to strictly follow the specifications to avoid harm to the environment and personnel. With the progress of technology and the change of market demand, the petroleum naphthalene industry will face new challenges and opportunities. Enterprises should continue to innovate, improve production efficiency and environmental protection level, in order to adapt to the future development of the market.