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:
Jan. 12, 2010
Filed:
Feb. 17, 2009
Wolfgang Lorenz, Dormagen, DE;
Matthias Boehm, Leverkusen, DE;
Richard Adamson, Leichlingen, DE;
Friedhelm Steffens, Leverkusen, DE;
Anke Hielscher, Houston, TX (US);
Wolfgang Lorenz, Dormagen, DE;
Matthias Boehm, Leverkusen, DE;
Richard Adamson, Leichlingen, DE;
Friedhelm Steffens, Leverkusen, DE;
Anke Hielscher, Houston, TX (US);
Bayer MaterialScience AG, Leverkusen, DE;
Abstract
The present invention relates to a process for the preparation of isocyanates by reacting the appropriate amines with phosgene, condensing the gas mixture thereby obtained, stripping the liquid phase thereby obtained and returning the solvent so retained in liquid form to the reaction stage. The gaseous constituents are then purified further in an absorption process.