Removal of caprolactam and its oligomers from cooling water containing these compounds

US4464266A · kind A · utility

Assignee

• BASF SE

Inventors

• Hugo Strehler · Bischofswerda, DE
• Robert Kegel · Bischofswerda, DE
• Guenter Valentin · Ludwigshafen, DE
• Werner Hoerauf · Ludwigshafen, DE

Key dates

• Filing date: Jun 4, 1982
• Grant date: Aug 7, 1984
• Expiry date: Jun 4, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/908
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for removing caprolactam and its oligomers from cooling water containing these compounds, wherein gases are introduced into the cooling water and the foam which forms is separated off.