[Chemical Knowledge]：Properties, uses, upstream and downstream raw materials, storage methods, boiling point of diethylbenzene

Introduction

Diethylbenzene (Diethylbenzene,DEB) is an important organic compound, which is widely used in chemical industry. This paper will analyze the nature, use, upstream and downstream raw materials and storage methods of diethylbenzene in detail, aiming to provide systematic information reference for chemical practitioners.

Properties of diethylbenzene

Diethylbenzene is a compound with an aromatic hydrocarbon structure, its chemical formula is C10H14, and its molecular weight is 134.22g/mol. There are three isomers of diethylbenzene: ortho-diethylbenzene (1,2-DEB), meta-diethylbenzene (1,3-DEB) and para-diethylbenzene (1,4-DEB). They are slightly different in physical properties, but are generally colorless transparent liquid with aromatic odor. Diethylbenzene has a boiling point between 180-186°C and a density of about 0.86g/cm³. It is insoluble in water, but soluble in most organic solvents.

Use of diethylbenzene

Diethylbenzene has many applications in industry, mainly as a solvent, reaction medium and an intermediate in organic synthesis. In the coatings and paint industry, diethylbenzene as a solvent can improve the performance and use of products. In organic synthesis, diethylbenzene is an important intermediate in the manufacture of surfactants, antioxidants, dyes and resins and other chemical products. Diethylbenzene is also used in the production of some specialty chemicals, such as specialty lubricant additives and stabilizers.

Diethylbenzene upstream feedstock

The main raw materials for the production of diethylbenzene are benzene and ethylene. Benzene is obtained by catalytic reforming or hydrocracking in petrochemical industry, which is an important basic organic chemical raw material. Ethylene is mainly derived from petroleum cracking gas or natural gas cracking. The preparation of diethylbenzene is usually achieved by the alkylation reaction of benzene and ethylene. In the presence of an acidic catalyst (such as sulfonic acid resin or sulfuric acid), benzene reacts with ethylene to form diethylbenzene and other by-products.

Diethylbenzene downstream products

As an intermediate, diethylbenzene can be further processed into a variety of downstream products. Its main downstream products include raw materials for the production of ethylbenzene (Styrene), antioxidants, plasticizers, surfactants and specialty solvents. In the polymer industry, ethylbenzene is an important monomer widely used in the production of polystyrene plastics. Diethylbenzene derivatives are also used in the manufacture of lubricating oil additives, rubber additives and coating additives.

Diethylbenzene storage method

Diethylbenzene is a flammable liquid and must be stored under safe conditions. The container for storing diethylbenzene should be sealed to avoid contact with oxygen in the air to prevent oxidation. The storage environment should be kept well ventilated, away from fire and heat sources, and the temperature should be controlled in a cool and dry place. For large-scale storage, it is recommended to use special storage tanks with fire and explosion-proof facilities to reduce safety hazards. During the transportation, the relevant regulations on the transportation of hazardous chemicals shall be observed to ensure the safety of transportation.

Safety and Environmental Precautions

When using and handling diethylbenzene, attention should be paid to its health and environmental effects. Diethylbenzene is irritating to the skin and eyes, and inhalation of its vapors may cause respiratory discomfort. Therefore, appropriate protective equipment such as gloves, goggles and gas masks should be worn during operation. Waste diethylbenzene and its containers should be treated as hazardous waste to avoid direct discharge to the environment to prevent pollution of soil and water bodies.

Conclusion

As an important chemical raw material, diethylbenzene has broad application prospects. Understanding its nature, use, upstream and downstream raw materials and storage methods has important guiding significance for personnel engaged in related industries. Through scientific management and safe operation, the industrial value of diethylbenzene can be effectively used, while reducing its impact on the environment and health.

Future Outlook

With the continuous progress of chemical technology, the production and application of diethylbenzene will be more efficient and environmentally friendly. The development of new catalysts and green processes may further reduce production costs and increase yields. The application prospect of diethylbenzene in the field of new materials and fine chemicals is also very broad, which deserves continuous attention and research.