Caprolactam (C6H11NO)

What is Caprolactam?

Caprolactam is a white crystalline powder with the chemical formula C6H11NO. It is an important organic compound used as a basic raw material in the production of nylon 6 (polycabrolactone).

Caprolactam, synthesized from petrochemical raw materials—particularly benzene, cyclohexane, and ammonia—is widely used in the production of polymers, fibers, and coating materials due to its high degree of purity.

Key features:

• It is water-soluble and has a stable structure.
• It is a strong industrial intermediate product.
• Over 90% is consumed in the production of nylon 6.

Caprolactam Properties

In Which Industries Is Caprolactam Used?

Plastics Industry

• In the production of nylon 6 and its derivatives.
• High-strength engineering plastics.

Textile Industry

• Production of durable fabrics and yarns using nylon 6 fiber.
• In textile products such as carpets, socks, and sportswear.

Chemical Industry

• As an intermediate in organic synthesis.
• Raw material for various polymers and resins.

Cosmetics and Personal Care

• Shampoo, hair care, and skin care product additive.

Food and Packaging Industry

• In food packaging films and coatings.

Other Uses

• Fertilizer additives.
• Auxiliary raw material in the pharmaceutical industry.
• Water-soluble film coatings.

How is Caprolactam Produced?

Caprolactam production is generally carried out through a multi-step process using cyclohexane, benzene, and ammonia as raw materials:

1. Oxidation of Cyclohexane
   • Cyclohexane is oxidized with a mixture of oxygen and nitrogen oxide.
   • Intermediate products such as cyclohexanol and cyclohexanone are obtained.
2. Caprolactone Formation and Hydrolysis
   • Intermediate products are hydrolyzed with catalysts such as sulfuric acid.
   • This process yields caprolactam.
3. Separation and Crystallization
   • Caprolactam is separated from other by-products and crystallized.
4. Drying and Purification
   • Caprolactam is produced with high purity by drying under vacuum.
5. Packaging
   • The final product is packaged and made available for industrial use.

Caprolactam production is an energy-intensive process, but it is of strategic economic importance due to the increasing demand for nylon 6.