US Patent Issued to BOREALIS on March 17 for "Process for producing alpha-olefin polymers in a multistage polymerization process" (Finnish Inventors)

ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,332, issued on March 17, was assigned to BOREALIS GMBH (Vienna).

"Process for producing alpha-olefin polymers in a multistage polymerization process" was invented by Pauli Leskinen (Porvoo, Finland), Erno Elovainio (Porvoo, Finland), Jouni Kivela (Porvoo, Finland) and Klaus Nyfors (Porvoo, Finland).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a process for producing alpha-olefin polymers in a multistage polymerization process which includes at least two gas phase polymerization reactors, wherein unreacted gas withdrawn from the second gas phase polymerization reactor is compressed in a compressor and said compresse...