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:
Sep. 23, 2025
Filed:
Nov. 07, 2024
Chevron Phillips Chemical Company Lp, The Woodlands, TX (US);
Max P. Mcdaniel, Bartlesville, OK (US);
Zhihui Gu, Kingwood, TX (US);
Ted H. Cymbaluk, Seabrook, TX (US);
Anand Ramanathan, Bartlesville, OK (US);
Julian Abrego, Pasadena, TX (US);
Taryn Huber, Pasadena, TX (US);
Ravindranath Koyyalagunta, Pasadena, TX (US);
Marlon L. Jordan, Pasadena, TX (US);
David W. Dockter, The Woodlands, TX (US);
Chevron Phillips Chemical Company LP, The Woodlands, TX (US);
Abstract
Processes for producing activated chromium catalysts such as chromium/silica catalysts and titanated chromium/silica catalysts are disclosed, and these processes utilize a multistep process involving exposure to inert and oxidizing atmospheres at specific temperature conditions. The resulting activated chromium catalysts have unexpectedly high melt index potential and can produce ethylene-based polymers with lower gel counts in addition to higher melt indices. Related activation systems are provided in which the fluidizing gas entering the fluidized bed vessel can be adjusted between an inert gas, an oxygen-containing gas, or a mixture of the inert gas and the oxygen-containing gas to minimize or prevent exotherms.