MUMBAI, India, June 24 -- Intellectual Property India has published a patent application (202617062075 A) filed by Basf Se on May 15, 2026, for Process For Producing Polyisocyanates.
Inventors include Thiele, Kai; Ferbitz, Jens; Vandewalle, Koenraad; and Mattke, Torsten.
The application for the patent was published on June 12, 2026, under issue no. 24/2026.
Abstract: The invention relates to a process for producing polyisocyanates by reacting organic amines with phosgene in an inert solvent, comprising: (a) mixing of an amine containing feed stream and a phosgene containing feed stream in a mixing apparatus, thereby obtaining a reaction mixture; (b) feeding the reaction mixture into a residence device in which the reaction continues, thereby obtaining an intermediate reaction mixture; (c) feeding the intermediate reaction mixture into a reactor in which a crude reaction product and a gas phase are achieved, and (d) working-up the crude reaction product to remove phosgene, if still present, and solvent, wherein additional gaseous hydrogen chloride is fed into the reactor of stage (c) such that it comes into contact with the crude reaction product, and excess phosgene and hydrogen chloride are removed from the crude reaction product in the reactor by distillation.
Disclaimer: Curated by HT Syndication.
