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. 15, 2026
Filed:
Nov. 01, 2022
Chevron Phillips Chemical Company Lp, The Woodlands, TX (US);
Cori A. Demmelmaier-Chang, Houston, TX (US);
Mark L. Hlavinka, Kingwood, TX (US);
Orson Sydora, Sugar Land, TX (US);
Sikander Hakim, Kingwood, TX (US);
Jeffery Gee, Kingwood, TX (US);
Joseph Bergmeister, Spring, TX (US);
Gabriela Alvez, Kingwood, TX (US);
Steven S. Lim, Houston, TX (US);
Chevron Phillips Chemical Company LP, The Woodlands, TX (US);
Abstract
A tandem polyolefin depolymerization-metathesis process and system for converting polymer waste to smaller hydrocarbons, specifically liquid and gaseous products, which subsequently can be modified and used as feeds or co-feeds for making circular products such as circular ethylene and polyethylene. Specifically, the disclosed processes include a tandem depolymerization process step followed by a metathesis process to provide a effluent that can be separated, further processed with a subsequent depolymerization step, or both. The effluents can be supplied to downstream processing units such as a steam cracker or AROMAX® unit thereby providing an efficient method for converting polymer waste into useful circular products. Therefore, these processes and systems can expand the number of usable plastic waste streams and improve the economics of plastic waste recycling.