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. 14, 2025
Filed:
May. 25, 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 recycling polyurethane material waste () for producing chemical feedstock for the production of isocyanates () and then polyurethanes (), in which method, proceeding from polyurethane material waste (), carbon dioxide () and hydrocarbons () are generated by pyrolysis (), the carbon dioxide () is converted by electrolysis () into carbon monoxide () and hydrogen (), as appropriate, the carbon monoxide () obtained is converted via phosgene to isocyanate () and the isocyanate () can be further processed into new polyurethane material ().