Patent · US Active

Method for producing isocyanates

US8258337B2 · kind B2 · utility

7Cited by

2References

23Claims

0Family size

Assignee

BASF SE

Inventors

Andreas Woelfert · Bad Rappenau, DE
Carsten Knoesche · Niederkirchen, DE
Andreas Daiss · Deidesheim, DE
Tsung-Chieh Cheng · Heppenheim, DE
Torsten Mattke · Ludwigshafen am Rhein, DE
Eckhard Stroefer · Mannheim, DE

Key dates

Filing date	Aug 23, 2006
Grant date	Sep 4, 2012
Priority date	—
Expiry date	Nov 8, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J19/26
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to a process for preparing isocyanates and an apparatus suitable for this purpose, and also its use. In the process, an amine and phosgene, both in the gas phase, react in the presence of an inert medium. A number, n, of amine streams are reacted with a number, n +1, of phosgene streams in a reactor. The number n is a positive integer of at least 1. All amine and phosgene streams are introduced into the reactor through annular gaps for mixing.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.