Method for processing pyrollidone and n-vinyl pyrollidone residues

US6888006B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Herbert Helfert · Bischofswerda, DE
• Martin Schmidt-Radde · Beindersheim, DE
• Gerhard Laqua · Mutterstadt, DE
• Ulrich Eiden · Kindenheim, DE
• Stephan Scholl · Bad Dürkheim, DE
• Christoph Übler · Lautersheim, DE

Key dates

• Filing date: May 10, 2001
• Grant date: May 3, 2005
• Expiry date: Nov 4, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D201/16
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for working up residues from the preparation of pyrrolidone and/or N-vinylpyrrolidone comprises subjecting the residues to a thermolysis.