Patent Number: 6,252,068

Title: Process for producing .epsilon.-caprolactam

Abstract: A high purity .epsilon.-caprolactam is prepared by crystallizing an .epsilon.-caprolactam from a hydrocarbon solution containing a crude .epsilon.-caprolactam, and allowing the crystallized .epsilon.-caprolactam in contact with hydrogen in the presence of a hydrogenation catalyst. This process can effectively remove impurities from a crude .epsilon.-caprolactam, which is obtained by subjecting cyclohexanone oxime to the Beckmann rearrangement, and provide a high purity .epsilon.-caprolactam.

Inventors: Fukao; Masami (Shiga, JP), Takamine; Kan (Osaka, JP)

Assignee: Sumitomo Chemical Company, Limited

International Classification: C07D 201/00 (20060101); C07D 201/16 (20060101); C07D 201/16 ()

Expiration Date: 06/26/2018