Method for simultaneous preparation of 6-aminocapronitrile and hexamethylene diamine

US6462220B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Hermann Luyken · Ludwigshafen, DE
• Frank Ohlbach · Mülheim an der Ruhr, DE
• Andreas Ansmann · Wiesloch, DE
• Peter Bassler · Viernheim, DE
• Rolf Fischer · Heidelberg, DE
• Johann-Peter Melder · Schifferstadt, DE
• Martin Merger · Bischofswerda, DE
• Alwin Rehfinger · Mutterstadt, DE
• Guido Voit · Freinsheim, DE
• Gunther Achhammer · Mannheim, DE

Key dates

• Filing date: Feb 26, 2001
• Grant date: Oct 8, 2002
• Expiry date: Feb 26, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/48
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the coproduction of 6-aminocapronitrile and hexamethylenediamine starting from adiponitrile bya) hydrogenating adiponitrile in the presence of a catalyst comprising an element of the eighth transition group as catalytically active component, to obtain a mixture comprising 6-aminocapronitrile, hexamethylenediamine, adiponitrile and high boilers,b) distillatively removing hexamethylenediamine from the mixture comprising 6-aminocapronitrile, hexamethylenediamine, adiponitrile and high boilers, and eithercl) distillatively removing 6-aminocapronitrile, and thend1) distillatively removing adiponitrile, orc2) simultaneously distillatively removing 6-aminocapronitrile and adiponitrile into separate fractionsis characterized by base of column temperatures below 185° C. in steps d1) or c2).