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[Chemical Knowledge]:Properties, uses, upstream and downstream raw materials, storage methods of cyclohexylamine, pkb of cyclohexylamine

Cyclohexylamine properties

Cyclohexylamine (Cyclohexylamine, CHA for short), molecular formula C6H13N, is an organic compound, belonging to aliphatic amines. Its molecular structure consists of a cyclohexane ring and an amino group (-NH2), which has the typical chemical properties of amines. Cyclohexylamine is a colorless to light yellow transparent liquid at room temperature and pressure, with a pungent odor, a density of 0.867g/cm³, a boiling point of 134-135°C, and a melting point of -17.7°C. It has good solubility and can be miscible with water, ethanol, ether and other organic solvents. Due to the amine group in its structure, cyclohexylamine is basic and can react with acids to form salts in aqueous solution.

Cyclohexylamine use

Cyclohexylamine is widely used in chemical and other industrial fields. It is an important intermediate in the production of pesticides, especially plays a key role in the synthesis of herbicides and pesticides. Cyclohexylamine is widely used in the production of rubber chemicals as an important raw material for vulcanization accelerators and antioxidants. Cyclohexylamine is also an intermediate for dyes and pigments and can be used to produce various dye auxiliaries. It is also used in the synthesis of water treatment agents, oilfield chemicals, coatings, textile auxiliaries and pharmaceutical intermediates. In the pharmaceutical industry, cyclohexylamine is a precursor or catalyst for certain drugs.

Cyclohexylamine upstream feedstock

The production of cyclohexylamine usually uses benzene as the main upstream raw material, generates cyclohexane through hydrogenation reaction, and then produces cyclohexylamine through amination reaction. Specifically, the main process for producing cyclohexylamine is as follows: benzene is hydrogenated in the presence of a catalyst (such as platinum, palladium, etc.) to generate cyclohexane; then, cyclohexane reacts with ammonia at high temperature and high pressure to generate cyclohexylamine. Phenol is also a potential upstream raw material, through the hydrogenation reaction to produce cyclohexanol, and then further dehydration to produce cyclohexene, and finally through the amination reaction to produce cyclohexylamine. Ammonia, as the necessary raw material for ammoniation reaction, is also the key raw material in the production process of cyclohexylamine.

Cyclohexylamine downstream products

Cyclohexylamine has a wide range of downstream products and a wide range of applications. It can be further reacted to form cyclohexyl isocyanate for the production of polyurethanes. Cyclohexylamine can also react with other chemical reagents to generate various cyclohexyl compounds, such as cyclohexyl methylamine, cyclohexyl ethylamine, etc., which have important applications in the fields of medicine, pesticide, dye and so on. Cyclohexylamine can also react with benzaldehyde to generate N-cyclohexylbenzylamine, which is an important intermediate in the production of rubber additives. In the field of water treatment, cyclohexylamine can be used as a raw material for corrosion inhibitors and fungicides to extend the service life of equipment and improve water treatment efficiency.

Cyclohexylamine production process

The production process of cyclohexylamine mainly includes ammoniation method and catalytic reduction method. Ammoniation is the most common production method, through the reaction of cyclohexane and ammonia at high temperature and high pressure to produce cyclohexylamine. The advantages of this method are that the raw materials are easily available, the process is simple, and it is suitable for large-scale industrial production. The catalytic reduction method is that cyclohexanone or cyclohexanol is subjected to a reduction reaction in the presence of a catalyst (such as nickel or ruthenium) to generate cyclohexylamine. This method has mild reaction conditions and high product purity, but high raw material cost, and is usually used for the production of high value-added products.

Cyclohexylamine Storage Method

Cyclohexylamine is a flammable and volatile chemical, and its storage and transportation require special attention. Cyclohexylamine should be stored in a cool, ventilated, dry place, away from direct sunlight and high temperature. The storage container shall be made of stainless steel or special plastic container with good sealing to prevent leakage and volatilization. During storage, keep away from fire sources, heat sources and oxidants to prevent fire or explosion. Cyclohexylamine is corrosive and should avoid contact with acidic substances to prevent chemical reactions from causing damage to the container. Operators should wear protective gloves and goggles when handling cyclohexylamine to avoid skin contact and vapor inhalation.

Cyclohexylamine safety and environmental impact

Cyclohexylamine has certain toxicity to human body, and long-term exposure may cause skin allergy, respiratory tract irritation and liver and kidney damage. The workplace should be equipped with good ventilation equipment, and operators should receive professional training and regular health checks. Cyclohexylamine is also potentially harmful to the environment, and its discharge into water bodies may cause water pollution and is toxic to aquatic organisms. Therefore, enterprises that produce and use cyclohexylamine should strictly abide by environmental protection regulations and adopt advanced waste gas and wastewater treatment technologies to reduce pollutant emissions.

Market Prospects and Trends

With the rapid development of chemical, pharmaceutical, pesticide and other industries, the market demand for cyclohexylamine is increasing. Especially in the field of pesticides and rubber chemicals, cyclohexylamine has broad application prospects. With the increasingly stringent environmental protection regulations, manufacturers need to continuously improve production processes, reduce energy consumption and pollution, and increase the added value of products and market competitiveness. Research and development of new cyclohexylamine derivatives with low toxicity and environmental protection is also the future development direction.

Conclusion

As an important chemical raw material, cyclohexylamine has been widely used in many fields. Its production involves upstream raw materials such as benzene and cyclohexane, which are produced by processes such as ammoniation or catalytic reduction. Cyclohexylamine has important applications in pesticides, rubber chemicals, dyes, pharmaceuticals and other industries, but its toxicity and environmental impact also need to be paid attention. When producing and using cyclohexylamine, enterprises should strictly abide by safety and environmental protection laws and regulations, and constantly innovate and improve the production process to meet the development trend of market demand and environmental protection requirements.

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