US Patent Issued to Stamicarbon on March 3 for "Production of urea for diesel exhaust fluid" (Dutch Inventors)

ALEXANDRIA, Va., March 3 -- United States Patent no. 12,565,622, issued on March 3, was assigned to Stamicarbon B.V. (Sittard, Netherlands).

"Production of urea for diesel exhaust fluid" was invented by Chuanbo Gao (Sittard, Netherlands), Khaled Elbassyouni (Sittard, Netherlands) and Lambertus Wilhelmus Gevers (Sittard, Netherlands).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a process for the production of an aqueous urea solution suitable for use as a Diesel Exhaust Fluid (DEF), wherein a condensate of off-gas obtained from further purifying an aqueous urea stream in a treatment section adapted to produce DEF, is sent to an LP dissociation section, thereby the removal of ammonia therefrom. T...