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:
May. 06, 2014
Filed:
Aug. 10, 2010
Torsten Mattke, Freinsheim, DE;
Gerhard Olbert, Dossenheim, DE;
Carsten Knoesche, Niederkirchen, DE;
Heiner Schelling, Kirchheim, DE;
Torsten Mattke, Freinsheim, DE;
Gerhard Olbert, Dossenheim, DE;
Carsten Knoesche, Niederkirchen, DE;
Heiner Schelling, Kirchheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
A process for preparing diisocyanates by gas-phase phosgenation starting out from a feed stream comprising the corresponding diamines and a phosgene-comprising feed stream, in which the feed streams are separately converted into the gas phase and preheated to the reaction temperature of the gas-phase phosgenation, wherein the waste heat from a plant for preparing chlorine by heterogeneously catalyzed oxidation of hydrogen chloride by the Deacon process is utilized for this purpose, is proposed.