Method for separating ammonia from solutions containing caprolactam and ammonia

US6896772B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Hermann Luyken · Ludwigshafen, DE
• Frank Ohlbach · Mülheim an der Ruhr, DE
• Stefan Maixner · Schwetzingen, DE
• Rolf Fischer · Heidelberg, DE
• Johann-Peter Melder · Schifferstadt, DE
• Peter Bassler · Viernheim, DE
• Andreas Ansmann · Wiesloch, DE

Key dates

• Filing date: Jun 2, 2001
• Grant date: May 24, 2005
• Expiry date: Jun 2, 2021

Classification

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

Abstract

A process for distillative removal of ammonia from solutions (I) which include a lactam and ammonia comprises effecting said removal in a distillation apparatus (a) at an absolute pressure of less than 10 bar.