[Chemical Knowledge]：Properties, uses, upstream and downstream raw materials, storage methods, physical properties of cyclohexanone oxime

Chemical Properties of Cyclohexanone Oxime

Cyclohexanone oxime (chemical formula: C6H11NO) is an important organic intermediate. It is a white crystalline solid formed by the reaction of cyclohexanone with hydroxylamine and has a slight characteristic odor. Cyclohexanone oxime has a melting point of 89-91 ° C. and a boiling point of 204 ° C. The solubility in water is low, but it is soluble in most organic solvents, such as ethanol, ether, benzene, etc. The oxime group (C = N-OH) in its chemical structure makes it nucleophilic and reductive, and can participate in a variety of chemical reactions.

Cyclohexanone oxime main purpose

The most important use of cyclohexanone oxime is as a precursor to caprolactam, a monomer of Nylon-6. In industrial production, cyclohexanone oxime produces caprolactam by Beckmann rearrangement, which is a key chemical step. Cyclohexanone oxime is also used to synthesize other organic compounds, such as pesticides, pharmaceutical intermediates, rubber additives, etc. It is an important reagent in organic synthesis, which can provide specific functional groups to promote the synthesis of a variety of complex molecules.

Cyclohexanone oxime upstream and downstream raw materials

The upstream raw materials for the production of cyclohexanone oxime are mainly cyclohexanone and hydroxylamine. Cyclohexanone is usually produced from benzene by hydrogenation to cyclohexane, which is then dehydrogenated to cyclohexanone, or by hydrogenation of phenol. Hydroxylamine can be prepared by the reaction of ammonium nitrate with hydrogen or by ammoxidation. The reaction of cyclohexanone and hydroxylamine to produce cyclohexanone oxime is a classical organic synthesis reaction.

In downstream applications, the main product of cyclohexanone oxime is caprolactam. Caprolactam is polymerized to produce nylon -6, which is widely used in textiles, plastics, automobiles, electronics and other fields. Other downstream products of cyclohexanone oxime include some specialty chemicals and high value-added pharmaceutical and pesticide intermediates.

Cyclohexanone Oxime Production Process

The production process of cyclohexanone oxime includes two major steps: the preparation of cyclohexanone and the synthesis of cyclohexanone oxime. The preparation methods of cyclohexanone mainly include liquid phase oxidation and gas phase oxidation, in which liquid phase oxidation is widely used. The synthesis of cyclohexanone oxime generally adopts the reaction method of cyclohexanone and hydroxylamine hydrochloride under alkaline conditions, which is simple, high yield and suitable for industrial production.

Cyclohexanone oxime storage method

As a chemical, cyclohexanone oxime needs to be stored under appropriate conditions to ensure its stability and safety. Cyclohexanone oxime should be stored in a cool, dry, well-ventilated warehouse, avoid direct sunlight and high temperature. Sealed containers should be used for storage to prevent moisture and oxidation. Due to the irritation of cyclohexanone oxime to the skin and eyes, appropriate protective equipment, such as gloves and goggles, should be worn during operation.

Cyclohexanone oxime safety and environmental protection requirements

In the handling and use of cyclohexanone oxime, need to pay attention to safety protection. Cyclohexanone oxime has an irritating effect on the skin and mucous membranes, and inhalation of its dust may cause damage to the respiratory system. Therefore, protective equipment should be worn during operation to avoid direct contact and inhalation of dust. The waste of cyclohexanone oxime shall be treated in accordance with hazardous waste management regulations and shall not be discarded at will to avoid pollution to the environment.

Cyclohexanone Oxime Market Prospect and Development Trend

As the global demand for nylon -6 continues to grow, the market demand for cyclohexanone oxime as its main precursor also shows a growing trend. Especially driven by the development of automotive, electronics, textile and other industries, the application field of nylon -6 materials continues to expand, which further stimulates the demand for cyclohexanone oxime. Technological progress and process improvement are also continuously reducing the production cost of cyclohexanone oxime and improving its market competitiveness.

Conclusion

As an important organic intermediate, cyclohexanone oxime has remarkable characteristics in chemical properties, applications and production processes. It plays a key role in the nylon -6 production chain, and the market demand is growing steadily. In order to ensure its safe and effective use, strict compliance with storage and operating regulations and environmental protection requirements must be observed. With the progress of technology and the expansion of application fields, the market prospect of cyclohexanone oxime is still broad.