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:
Aug. 09, 2011
Filed:
Jul. 24, 2003
Andreas Woelfert, Bad Rappenau, DE;
Christian Mueller, Mannheim, DE;
Eckhard Stroefer, Mannheim, DE;
Markus Weber, Ludwigshafen, DE;
Joachim Pfeffinger, Ludwigshafen, DE;
Carsten Knoesche, Niederkirchen, DE;
Andreas Woelfert, Bad Rappenau, DE;
Christian Mueller, Mannheim, DE;
Eckhard Stroefer, Mannheim, DE;
Markus Weber, Ludwigshafen, DE;
Joachim Pfeffinger, Ludwigshafen, DE;
Carsten Knoesche, Niederkirchen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The invention relates to a process for preparing aromatic diisocyanates by reaction of phosgene with diamines in the gas phase, in which the reaction is carried out in a reaction zone at moderate pressures, i.e. the pressure in this reaction zone is more than 3 bar and less than 20 bar.