ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,891, issued on May 20, was assigned to BASF SE (Ludwigshafen am Rhein, Germany).

"Removal of Al-salts, HCl, NaCl and organic by-product from DIOPAT suspension by means of ceramic membranes in strong acidic conditions at high temperature" was invented by Jacek Malisz (Ludwigshafen am Rhein, Germany), Andreas Mueller (Ludwigshafen am Rhein, Germany), Johannes Nagel (Ludwigshafen am Rhein, Germany) and Dominik Lanzinger (Ludwigshafen am Rhein, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides an improved process for isolating 2,4-bis-(2,4-dihydroxyphenyl)-6-(4-methoxyphenyl)-1,3,5-triazine (DIOPAT) from an aqueous al...