The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2012
Filed:
Aug. 23, 2006
Andreas Woelfert, Bad Rappenau, DE;
Carsten Knoesche, Niederkirchen, DE;
Andreas Daiss, Deidesheim, DE;
Tsung-chieh Cheng, Heppenheim, DE;
Torsten Mattke, Freinsheim, DE;
Eckhard Stroefer, Mannheim, DE;
Andreas Woelfert, Bad Rappenau, DE;
Carsten Knoesche, Niederkirchen, DE;
Andreas Daiss, Deidesheim, DE;
Tsung-Chieh Cheng, Heppenheim, DE;
Torsten Mattke, Freinsheim, DE;
Eckhard Stroefer, Mannheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
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.