The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 2026
Filed:
Dec. 20, 2022
Chevron Phillips Chemical Company Lp, The Woodlands, TX (US);
Joseph A. Curren, Sr., Houston, TX (US);
Kenneth A. Dooley, Porter, TX (US);
Jeffrey S. Lowell, Huffman, TX (US);
Chevron Phillips Chemical Company LP, The Woodlands, TX (US);
Abstract
A technique of operating a gas phase fluidized bed polymerization reactor system may include feeding an olefin monomer and catalyst to a polymerization reactor. The monomer and the catalyst are contacted in a fluidized bed in the reactor to form a product including a polyolefin. A heat of polymerization is extracted from the reactor by recycling an inert condensable agent through the fluidized bed and condensing the inert condensable agent. The product is discharged from the reactor. The inert condensable agent includes propane, n-butane, or isobutane in a total mole fraction of greater than or equal to 0.50 of the inert condensable agent. A system including a gas phase fluidized bed polymerization reactor system may include a source of propane, n-butane, or isobutane for introduction into the polymerization system as an inert condensable agent. A loop slurry polymerization reactor system outlet may be the source of isobutane or propane.