US Patent Issued to BASF on Sept. 16 for "Process for the preparation of hexamethylenediamine by hydrogenation of adiponitrile with reduced formation of diaminocyclohexane" (French Inventors)

ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,415,775, issued on Sept. 16, was assigned to BASF SE (Ludwigshafen Am Rhein, Germany).

"Process for the preparation of hexamethylenediamine by hydrogenation of adiponitrile with reduced formation of diaminocyclohexane" was invented by Maxime Huchede (Lyons, France) and Sandra Chouzier (Deaux, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a process for the preparation of hexamethylenediamine by hydrogenation of adiponitrile in the presence of a Raney nickel catalyst, wherein a Raney nickel catalyst modified by treatment with carbon monoxide or carbon dioxide in a liquid medium is used."

The patent was filed on M...