Method for producing polyamides

US6353085B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Ralf Mohrschladt · Schwetzingen, DE
• Volker Hildebrandt · Mannheim, DE
• Gunter Pipper · Bad Dürkheim, DE
• Eberhard Fuchs · Bischofswerda, DE

Key dates

• Filing date: Aug 16, 2000
• Grant date: Mar 5, 2002
• Expiry date: Aug 16, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G69/18
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a process for producing polyamides by polymerization of lactams in the presence of metal oxides as heterogeneous catalysts, the metal oxides are used in a form which permits mechanical removal from the reaction mixture and are removed from the reaction mixture in the course of or on completion of the polymerization.