ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,055, issued on March 31, was assigned to BASF SE (Ludwigshafen am Rhein, Germany).
"Process for producing isocyanates" was invented by Kai Thiele (Antwerp, Belgium), Jens Ferbitz (Ludwigshafen am Rhein, Germany) and Torsten Mattke (Ludwigshafen am Rhein, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention concerns a process for the preparation of isocyanates and/or polyisocyanates by reacting the corresponding amines with phosgene in a reactor, where isocyanates are obtained from a mixture of amines in gaseous or liquid form and phosgene in gaseous form, wherein no liquid solvents are used in the feeding, mixing, reacting, ...