Preparation of caprolactam

US5495014A · kind A · utility

Assignee

• BASF SE

Inventors

• Eberhard Fuchs · Bischofswerda, DE
• Tom Witzel · Ludwigshafen, DE

Key dates

• Filing date: Dec 19, 1994
• Grant date: Feb 27, 1996
• Expiry date: Dec 19, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D201/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Caprolactam is prepared by cleaving oligomers or polymers containing essentially the repeating unit --[--N(H)-(CH.sub.2).sub.5 --C(O)--]- in the presence of a catalyst at elevated temperatures by a process in which the cleavage is carried out in the liquid phase in the presence of a heterogeneous catalyst and of an organic solvent.