US Patent Issued to Covestro Deutschland on July 29 for "Process for preparing double metal cyanide catalysts" (German Inventors)

ALEXANDRIA, Va., July 30 -- United States Patent no. 12,370,535, issued on July 29, was assigned to Covestro Deutschland AG (Leverkusen, Germany).

"Process for preparing double metal cyanide catalysts" was invented by Joerg Hofmann (Krefeld, Germany), Maria Gleixner (Kempen, Germany) and Thomas Asma (Tonisvorst, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a process for preparing a double metal cyanide (DMC) catalyst, comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of an alkaline metal cyanide salt, an organic complex ligand optionally a complex-forming component, wherein the metal cyanide salt is one or more compound...