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:
Feb. 16, 2021
Filed:
Mar. 29, 2018
Covestro Deutschland Ag, Leverkusen, DE;
Manfred Kobylka, Burscheid, DE;
Michael Merkel, Düsseldorf, DE;
Dominik Duerig, Aachen, DE;
Bernhard Seidel, Leverkusen, DE;
Covestro Deutschland AG, Leverkusen, DE;
Abstract
The invention relates to a cleaning device for separating an organic isocyanate produced by the reaction of an organic amine with a stoichiometric excess of phosgene in the gas phase from the gaseous raw product obtained in the reaction, said device comprising a first separating body comprising at least one raw product supply line for a gaseous raw product flow containing at least the isocyanate, hydrogen chloride and non-reacted phosgene, a first liquid supply line for a liquid flow containing at least one quench liquid, and a first liquid discharge line for a liquid flow containing at least part of the quench liquid and part of the isocyanate, a first gas line for transporting a gas flow containing at least hydrogen chloride, evaporated quench liquid and phosgene leading away from the first separating body. The invention is characterized in that at least one addition body for directly introducing at least one cooling fluid for an at least partial condensation and/or absorption of the gas flow that can be guided via the first gas line is associated with the first gas line.