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, 2025
Filed:
Nov. 05, 2020
Covestro Intellectual Property Gmbh & Co. KG, Leverkusen, DE;
Andreas Bulan, Langenfeld, DE;
Rainer Weber, Odenthal, DE;
COVESTRO INTELLECTUAL PROPERTY GMBH & CO. KG, Leverkusen, DE;
Abstract
The invention relates to a method for producing isocyanates and optionally polyurethanes by at least: synthesising () phosgene () from carbon monoxide () and chlorine (); reacting () phosgene () with diamines () to form diisocyanates () and hydrogen chloride (); providing a carbon dioxide gas flow (); and cleaning () the carbon dioxide gas flow () of additional components, wherein the carbon dioxide is converted by means of an RWGS reaction () to form carbon monoxide () and hydrogen (), which are used as raw materials for the polyurethane production, as well as optionally reacting () the diisocyanates () with polyether polyol () and/or polyester polyol () to form polyurethanes ().