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:
Apr. 03, 2018
Filed:
Feb. 05, 2014
Applicant:
Bayer Materialscience Ag, Leverkusen, DE;
Inventors:
Friedhelm Steffens, Leverkusen, DE;
Bastian Mahr, Bergisch Gladbach, DE;
Assignee:
Covestro Deutschland AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 263/20 (2006.01); C07C 263/18 (2006.01); B01D 3/00 (2006.01); C07C 253/00 (2006.01);
U.S. Cl.
CPC ...
C07C 263/20 (2013.01); B01D 3/009 (2013.01); C07C 263/18 (2013.01); C07C 253/00 (2013.01);
Abstract
The present invention relates to a process for separating an isocyanate prepared by reaction of a primary amine with an excess of phosgene in the gas phase from the gaseous crude product obtained in the reaction, wherein