Continuous process for the preparation of alkyleneimines

US7683216B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Thomas Knebel · Schifferstadt, DE
• Gerd Saas · Einselthum, DE
• Wolfgang Schreieck · Ludwigshafen, DE
• Horst Schroeder · Bad Dürkheim, DE
• Manfred Winter · Dittelsheim-Heßloch, DE

Key dates

• Filing date: Apr 18, 2008
• Grant date: Mar 23, 2010
• Expiry date: Apr 18, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D227/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of alkyleneimines by subjecting sulfuric acid monoesters of aminoalkanols to an at least two-stage reaction with aqueous bases at a temperature of at least 110° C. under pressure, relieving the pressure of the reaction mixture and distilling off the alkyleneimines from the reaction mixture after each reaction stage, wherein the conversion in the first stage is from 40 to 90% and that in the second stage is from more than 90% to 99.99%.