Patent ID: 6433166
Filing Date: 2002-08-13
Classification: C07D

Abstract:
A process for producing &egr;-caprolactam, comprising the steps of:(i) pouring molten, crude &egr;-caprolactam and a solvent together into a vessel, the solvent comprising an aliphatic hydrocarbon and having a temperature lower than the temperature of the crude &egr;-caprolactam, and mixing the &egr;-caprolactam and solvent at a temperature of from about 30Â° C. to less than the melting point of &egr;-caprolactam, to obtain a first slurry containing crystallized &egr;-caprolactam and (ii) subjecting the slurry to a solid-liquid separation to obtain the &egr;-caprolactam and a first liquid phase.