ALEXANDRIA, Va., July 21 -- United States Patent no. 12,685,991, issued on July 21, was assigned to Basell Polyolefine GmbH (Wesseling, Germany).
"Reactor for a gas-phase olefin polymerization" was invented by Giuseppe Penzo (Mantova, Italy), Maurizio Dorini (Ferrara, Italy), Riccardo Rinaldi (Ferrara, Italy), Enrico Balestra (Ferrara, Italy) and Gian Luca Bonaccorsi (Ferrara, Italy).
According to the abstract* released by the U.S. Patent & Trademark Office: "A reactor for carrying out a gas-phase olefin polymerization in the presence of a polymerization catalyst, made from or containing (i) a first polymerization zone adapted and arranged for growing polymer particles to flow upward under fast fluidization or transport conditions, (ii) a...