Removal of halides from halide-containing nitrile mixtures

US6153784A · kind A · utility

Assignee

• BASF SE

Inventors

• Heinz-Josef Kneuper · Mannheim, DE
• Hans-Jurgen Weyer · Frankenthal (Pfalz), DE
• Horst Neuhauser · Dudenhofen, DE
• Johann-Peter Melder · Schifferstadt, DE
• Andreas Henne · Neustadt, DE
• Karl-Heinz Ross · Grünstadt, DE
• Rainer Becker · Bad Dürkheim, DE

Key dates

• Filing date: Feb 17, 1998
• Grant date: Nov 28, 2000
• Expiry date: Feb 17, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C253/34
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Halides are removed from halide-containing nitrile mixtures by PA1 (a) thermally treating the halide-containing nitrile mixture, PA1 (b) subsequently adding a base to the thermally treated nitrile mixture and PA1 (c) subsequently separating off the base from the nitrile mixture. Amines are prepared by PA1 (A) reacting alkyl halides with metal cyanides in an at least two-phase reaction medium in the presence of halide-containing phase-transfer catalysts to give alkanenitriles, PA1 (B) separating off the resulting halide-containing alkanenitrile mixture phase and PA1 (C) further treating the halide-containing alkanenitrile mixture phase, as described in the stages PA2 (a)-(c) removing halides from halide-containing nitrile mixtures and PA2 (d) hydrogenating nitrites obtained in stage (c) to give amines, in the presence of suspended or fixed-bed catalysts.