Process for preparing aminoalkyl nitriles and diamines from such nitriles

US8497399B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Jan Eberhardt · Mannheim, DE
• Thilo Hahn · Kirchheimbolanden, DE
• Johann-Peter Melder · Schifferstadt, DE
• Gerhard Fritz · Schifferstadt, DE
• Volkmar Menger · Neustadt, DE
• Thomas Hill · Ludwigshafen, DE

Key dates

• Filing date: Oct 17, 2011
• Grant date: Jul 30, 2013
• Expiry date: Feb 6, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/0011
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing a diamine from a corresponding aminoalkyl nitrile, which is prepared by reaction of a corresponding monoamine with a corresponding alkenyl nitrile in a continuous mode of operation, comprising the steps: a) introduction of the corresponding monoamine into a continuously conveyed reaction stream; b) introduction of the corresponding alkenyl nitrile into the reaction stream, with this already comprising the aminoalkyl nitrile on addition; c) reaction of the reaction stream in a first reaction region; d) at least partial transfer of the reaction stream into at least one second reaction region for further reaction; e) discharge of the reaction stream from the second reaction region after the reaction; f) introduction of the reaction stream discharged in step (a) into a reduction region; and g) reduction of the aminoalkyl nitrile present in the reaction stream to the corresponding diamine.