ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,460,023, issued on Nov. 4, was assigned to Chevron Phillips Chemical Co. LP (The Woodlands, Texas).
"Catalyst pretreatment and feeding system for polypropylene production" was invented by Reza Khankal (Humble, Texas), Joel A. Mutchler (Porter, Texas), Bryan M. Garner (Alvin, Texas) and James E. Hein (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "A process and system for pre-polymerizing propylene are disclosed. A first catalyst suspension is formed by mixing catalyst particles with a hydrocarbon that is a saturated hydrocarbon or propylene. Various other catalyst components are added to the first catalyst suspension, and the first catalyst suspe...