Recovery of caprolactam monomer and oligomer from aqueous polycaprolactam extracts

US5962681A · kind A · utility

Assignee

• BASF SE

Inventors

• Horst Egly · Böhl-Iggelheim, DE
• Hans-Harald Hünger · Ellerstadt, DE
• Thomas Sauer · Hochheim, DE

Key dates

• Filing date: Nov 18, 1997
• Grant date: Oct 5, 1999
• Expiry date: Nov 18, 2017

Classification

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

Abstract

The disclosure is a process for recovering caprolactam monomer and oligomer from aqueous polycaprolactam extracts by removing the inorganic contaminants present therein.