ALEXANDRIA, Va., July 28 -- United States Patent no. 12,692,359, issued on July 28, was assigned to Covestro Deutschland AG (Leverkusen, Germany).
"Method for recovering raw materials from polyurethane foams" was invented by Dirk Hinzmann (Pulheim, Germany), Sebastian Scherf (Leverkusen, Germany) and Michael Baecker (Korschenbroich, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a method for recovering raw materials (i.e. of polyols and optionally additionally amines) from polyurethane foams, comprising chemolysis. The chemolysis is characterised in that a polyurethane foam is reacted with an alcohol and water in the presence of a catalyst at a temperature of between ...