ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,556, issued on Jan. 13, was assigned to BASF SE (Ludwigshafen am Rhein, Germany).
"Process for recovering acrylic acid" was invented by Ulrich Hammon (Ludwigshafen am Rhein, Germany), Klaus Joachim Mueller-Engel (Ludwigshafen am Rhein, Germany) and Steffen Rissel (Ludwigshafen am Rhein, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a process for recovering acrylic acid which is obtained by catalytic gas phase oxidation of propene, wherein, in an absorption stage (K2), the acrylic acid is absorbed from the reaction mixture (1) from the gas phase oxidation with a first solvent (3) and is drawn off for distilla...