[Chemical Knowledge]：Properties, uses, upstream and downstream raw materials, storage methods, structural formula of m-methyl phenol

Properties of m-ethylphenol

m-Ethylphenol (meta-Ethylphenol) is an aromatic compound with the molecular formula C8H10O and a molecular weight of 122.17g/mol. In its chemical structure, the third position (meta position) on the benzene ring has an ethyl substituent, and the first position has a hydroxyl group. This structure gives m-ethylphenol unique physical and chemical properties. It is a colorless to light yellow liquid at room temperature, with a fragrant odor, a boiling point of about 200°C, and a density of about 0.97g/cm³. Its solubility in water is low, but it is soluble in most organic solvents such as ethanol, ether and chloroform.

Use of m-ethyl phenol

m-Ethyl phenol is widely used in many industrial fields. It is an important intermediate in the production of antioxidants. For example, m-ethylphenol can be synthesized as an antioxidant for use in foods, plastics, and rubber to prevent degradation of these materials under the influence of oxygen and light. It is also an intermediate for pesticides and pharmaceuticals, and many pesticides, herbicides and pharmaceuticals require the use of m-ethyl phenol as a raw material. m-ethylphenol is also used in the manufacture of fragrances and essences, and because of its unique aromatic properties, it can be an important ingredient in perfumes and daily chemical products.

m-Ethylphenol Upstream Feed

The main upstream feedstocks for the production of m-ethylphenol include phenol and ethylene. Phenol is produced by the nitration, reduction and acidic cracking of benzene, while ethylene is usually derived from the by-product of the petroleum cracking process. The specific synthesis process is an alkylation reaction of phenol with ethylene under certain conditions to generate m-ethyl phenol. In this process, the reaction conditions such as temperature, pressure and the choice of catalyst have a significant impact on the yield and purity of the product.

m-Ethyl phenol downstream products

The downstream products of m-ethyl phenol mainly include antioxidants, drugs, pesticides and fragrances. Antioxidant is one of the most important applications of m-ethyl phenol, such as BHT (2,6-di-tert-butyl-p-cresol) and other products are widely used in food additives, plastic stabilizers and rubber protection agents. On the pharmaceutical side, m-ethylphenol is used as an intermediate in the synthesis of a variety of compounds with therapeutic effects, such as certain analgesics and anti-inflammatory drugs. In the field of pesticides, it is used as an important raw material for the synthesis of some highly effective and low toxic pesticides and herbicides. In the field of fragrance, m-ethylphenol is used to produce various compounds with special aroma, which are used in daily chemical products such as perfume, shampoo and shower gel.

Production process of m-ethyl phenol

The production of m-ethylphenol generally employs an alkylation reaction, and specific methods include liquid phase alkylation and vapor phase alkylation. The liquid phase alkylation process is relatively mature, the reaction conditions are mild, and it is suitable for large-scale production. The gas phase alkylation process is carried out at high temperature, which has the advantages of fast reaction rate and high product purity. Both processes require the use of catalysts, such as acidic ion exchange resins or solid acid catalysts, to improve reaction efficiency and selectivity.

MEDIA ETHYL PHENOL STORAGE METHOD

Since m-ethylphenol is a chemically active substance, special care is required during storage. It should be stored in a cool, dry, well-ventilated warehouse, avoid direct sunlight and high temperature environment. Storage containers shall be of closed, corrosion-resistant material, such as stainless steel or glass, and shall be kept away from sources of ignition and heat. The warehouse shall be equipped with appropriate fire fighting equipment and leakage emergency treatment device to prevent accidents. Personnel should wear protective gloves, goggles and protective clothing during operation to avoid direct contact.

Safety and Environmental Considerations

Safety and environmental concerns are equally important when dealing with m-ethylphenol. Its vapors and liquids are irritating to the skin, eyes and respiratory tract, and prolonged exposure may cause health problems. Therefore, in the process of production and use, must strictly abide by the safety operation procedures, equipped with the necessary protective equipment and first aid measures. Waste disposal should follow environmental regulations to prevent environmental pollution. Waste liquid and waste gas can be treated by chemical neutralization, incineration or biodegradation to ensure environmental compliance.

Conclusion

As an important organic compound, m-ethylphenol has a variety of uses and is widely used in the fields of antioxidants, drugs, pesticides and spices. Its production relies on upstream feedstocks such as phenol and ethylene, and is produced by alkylation reactions. Pay attention to safety and environmental protection during storage and use, and ensure that the operation specifications and waste disposal meet the standards. With the progress of chemical technology and the growth of demand, m-ethyl phenol will become more and more important in the industry.