Process for the purification of epsilon-caprolactam

摘要

Process for the removal of residues of solvent from crystallized epsilon -caprolactam, wherein the major quantity of solvent is removed in a first stage by distillation in the presence of water in an amount so that the water content of the residue of the first stage is from 0.5 to 6% by weight, and in a second stage by distilling water and any residues of solvent still present.