US Patent Issued to ENI on June 30 for "Process for preparing polypropylene carbonate" (Italian Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,661, issued on June 30, was assigned to ENI S.P.A. (Rome).

"Process for preparing polypropylene carbonate" was invented by Paolo Biagini (Novara, Italy), Riccardo Po (Novara, Italy), Simona Losio (Garbagnate Milanese, Italy) and Massimiliano Brivio (Monza, Italy).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is a process for the preparation of polypropylene carbonate having the step of copolymerization of propylene oxide and carbon dioxide (CO2) in the presence of a catalytic system including: at least one catalyst selected from complexes of a transition metal having general formula (I): at least one co-catalyst selected from: (a) ionic compou...