Extraction agent of caprolactam

This invention discloses an extractant for caprolactam, which is a composition of C6-8 alkane 5-50 parts, and low carbon alcohol 50-95 parts. The low carbon alcohol component has high extraction ability to caprolactam, which has a distribution coefficient of 1.0 in low carbon alcohol-water system. The distribution coefficient can increase with the decrease of caprolactam content. The extractant has such advantages as good phase separation performance, low extractant loss, no emulsification, high extraction ability, controllable selectivity, easy reverse extraction, high caprolactam recovery rate, and no pollution.