[Chemical Knowledge]：Properties, uses, upstream and downstream raw materials, storage methods, physical and chemical properties of o-dichlorobenzene

PROPERTIES OF O-DICHLOROBENZENE

o-dichlorobenzene (o-Dichlorobenzene, referred to as o-DCB), chemical formula for C6H4Cl2, is a colorless transparent liquid, with a special aromatic smell. It has a boiling point of 180.5°C, a melting point of -17°C, a relative density of 1.30 and a refractive index of 1.552. Ortho-dichlorobenzene is insoluble in water, but it is miscible with most organic solvents such as ethanol, ether, benzene, etc. Its chemical properties are relatively stable, but in the presence of strong oxidants will occur oxidation reaction, the generation of dichlorophenol and other derivatives.

Application of ortho-dichlorobenzene

Ortho-dichlorobenzene is mainly used in chemical production. It is an important intermediate for the synthesis of herbicides, dyes, pharmaceuticals and rubber chemicals. For example, ortho-dichlorobenzene can be used to produce glyphosate (Glyphosate), a widely used non-selective herbicide. It is used as a dye intermediate in the dye industry and in pharmaceutical synthesis for the manufacture of analgesics, antibacterials, etc. In the rubber industry, o-dichlorobenzene is used as a softener and solvent. It is also used in the preparation of resins, plasticizers and organic pigments.

Ortho-dichlorobenzene upstream and downstream raw materials

The production of o-dichlorobenzene is mainly achieved by the chlorination reaction of benzene. Its upstream raw materials mainly include benzene and chlorine. Chlorobenzene chloride reacts in the presence of iron or ferric chloride catalyst to obtain ortho-, meta-and para-dichlorobenzene isomers, which are separated by distillation to obtain ortho-dichlorobenzene. Downstream products cover herbicides, dyes, pharmaceutical intermediates and rubber additives and other fields. As the demand for downstream products such as glyphosate grows, so does the market demand for o-dichlorobenzene.

STORAGE METHOD OF O-DICHLOROBENZENE

Due to the relatively stable chemical properties of o-dichlorobenzene, attention should be paid to its storage method to ensure safety. o-dichlorobenzene should be stored in a cool, ventilated warehouse, away from fire, heat, avoid direct sunlight. The storage container shall be sealed to prevent leakage. It is recommended to use stainless steel or glass fiber reinforced plastic storage tanks because they are corrosive to metals. The storage area shall be equipped with appropriate fire extinguishing equipment such as foam fire extinguishers and carbon dioxide fire extinguishers and emergency spill handling equipment.

o-Dichlorobenzene Safety

Ortho-dichlorobenzene has a certain impact on the environment and human health. Exposure to o-dichlorobenzene may cause skin irritation, eye stinging, and respiratory discomfort. Prolonged exposure or exposure to high concentrations may cause damage to the liver, kidneys, and nervous system. Therefore, operators should wear protective gloves, goggles and gas masks when handling o-dichlorobenzene, and ensure good ventilation in the workplace. Discarded o-dichlorobenzene and its packaging shall be disposed in accordance with hazardous waste management regulations and shall not be discarded at will to prevent environmental pollution.

o-Dichlorobenzene Market Prospects

With the continuous development of the global chemical industry, the demand for o-dichlorobenzene is growing steadily. Especially in the pesticide and pharmaceutical industries, the demand for herbicides such as glyphosate and related drugs has driven the market demand for o-dichlorobenzene. The Asia-Pacific region, especially China and India, as the world's largest chemical production base and consumer market, is expected to continue to lead the market demand for o-dichlorobenzene. With the increasingly stringent environmental protection laws and regulations, the production process of waste gas, waste water treatment requirements will be higher, which will also promote enterprises in the production technology and environmental protection measures to continuously improve.

Technological innovation and future development

In order to cope with the increasingly stringent environmental regulations and market competition, o-dichlorobenzene production enterprises need to continuously innovate technology, improve production efficiency and reduce pollution emissions. The use of green chemical technology to reduce energy consumption and waste emissions is the future development trend. For example, the selectivity and yield of the chlorination reaction can be improved and the formation of by-products can be reduced using new catalysts and reactor designs. Companies can develop new application areas, such as the manufacture of high-performance materials, to further expand the o-dichlorobenzene market.

Summary

As an important chemical intermediate, o-dichlorobenzene has a wide range of applications and market prospects. Its upstream main raw materials are benzene and chlorine, which are produced by chlorination reaction; downstream products cover herbicides, dyes, pharmaceutical intermediates and other fields. Although the chemical properties of o-dichlorobenzene are relatively stable, its storage and use still need to pay attention to safety measures. With the development of the global chemical market and the improvement of environmental protection requirements, the production technology of o-dichlorobenzene will continue to innovate to meet the dual needs of the market and environmental protection. In the future, o-dichlorobenzene still has great development potential in technological innovation and market expansion.