US Patent Issued to BASF on Jan. 20 for "Process for producing superabsorbent polymer particles" (Thai, German Inventors)

ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,528,071, issued on Jan. 20, was assigned to BASF SE (Ludwigshafen, Germany).

"Process for producing superabsorbent polymer particles" was invented by Norbert Herfert (Ludwigshafen, Germany), Sukanya Nuasaen (Rayong, Thailand) and Peannapa Arsoon (Rayong, Thailand).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a process for producing superabsorbent polymer particles, comprising polymerization of a monomer solution, drying the formed polymer gel, grinding the dried polymer gel, classifying and thermally surface post-crosslinking the polymer particles, wherein the monomer solution comprises a chelating agent and an aluminum salt."...