kaprolactam

Caprolactam is an organic compound with the formula (CH2)5C(O)NH. It is a white, crystalline solid with a distinct odor and is soluble in water and many organic solvents. Caprolactam is a cyclic amide, and its most significant industrial application is as a precursor to Nylon 6. This polymerization process involves the ring-opening polymerization of caprolactam.

The primary method for caprolactam production is the Beckmann rearrangement of cyclohexanone oxime. This reaction, typically carried out in the presence of strong acids like sulfuric acid, converts the oxime into the lactam. Other methods exist, including the direct oxidation of cyclohexane or the reaction of butadiene with carbon monoxide and ammonia, though these are less common commercially.

Nylon 6, derived from caprolactam, is a versatile polymer used in a wide array of applications. These include textiles for clothing and carpets, engineering plastics for automotive parts and electrical components, films for packaging, and industrial fibers for ropes and nets. The properties of Nylon 6, such as its strength, durability, and elasticity, make it a valuable material in many industries. Caprolactam itself also finds some minor uses as a solvent or in the synthesis of other chemical compounds, but its role as a monomer for Nylon 6 dominates its market.