Purification of caprolactam

US7217818B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Rolf Fischer · Heidelberg, DE
• Hermann Luyken · Ludwigshafen, DE
• Andreas Ansmann · Wiesloch, DE
• Peter Bassler · Viernheim, DE
• Christoph Benisch · Mannheim, DE
• Stefan Maixner · Schwetzingen, DE
• Johann-Peter Melder · Schifferstadt, DE

Key dates

• Filing date: Nov 11, 2003
• Grant date: May 15, 2007
• Expiry date: Nov 11, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D201/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for removing high boilers from crude caprolactam which comprises high boilers, caprolactam and in some cases low boilers, and which has been obtained by