Method and device for the continuous production of organic mono or polyisocyanates

US6867324B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Andreas Wölfert · Bad Rappenau, DE
• Ulrich Penzel · Lauscha, DE

Key dates

• Filing date: May 21, 2001
• Grant date: Mar 15, 2005
• Expiry date: May 21, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/00164
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Starting material streams are mixed in a mixer (13) for the phosgenation of amines by a process in which the reaction product (3) is removed in a closed loop and the starting material streams (1.2) contain organic solvents. The main streams (1.1, 2.1) and/or part-streams (1.2, 2.2) of the starting materials (1, 2) come into contact with one another according to the countercurrent principle.