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:
Jun. 09, 2015
Filed:
Jul. 06, 2010
Applicants:
Rainer Bruns, Leverkusen, DE;
Wolfgang Lorenz, Dormagen, DE;
Andreas Karl Rausch, Neuss, DE;
Inventors:
Assignee:
Bayer MaterialScience AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 263/10 (2006.01);
U.S. Cl.
CPC ...
C07C 263/10 (2013.01); C07C 263/10 (2013.01); C07C 265/14 (2013.01);
Abstract
Isocyanates are produced by reacting a primary amine with phosgene in the gas phase. In this process, the amine is vaporized and then superheated prior to introduction into the reactor. The amine is superheated to a temperature at least 10° C. above dew point before entry into the reactor. A pressure difference between the vaporizer and entry into the reactor of from 1 to 500 mbar is maintained.