ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,479,789, issued on Nov. 25, was assigned to EVONIK OPERATIONS GMBH (Essen, Germany).
"Process for distillative purification of unsaturated carboxylic anhydrides" was invented by Steffen Krill (Muhltal, Germany) and Dirk Broll (Langen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a process for distillative removal of a unsaturated carboxylic anhydride of the general formula (I) R-C(O)-O-C-(O)-R in which R is an unsaturated organic radical having 2 to 12 carbon atoms, wherein said unsaturated carboxylic anhydride is discharged in gaseous form from a sidestream take-off and is condensed in an atomized liquid circulating s...