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:
Jun. 16, 2026
Filed:
Mar. 30, 2023
Chevron U.s.a. Inc., San Ramon, CA (US);
Joel E. Schmidt, San Ramon, CA (US);
Hye-Kyung C. Timken, Albany, CA (US);
Tengfei Liu, San Ramon, CA (US);
Richard L. Grove, San Ramon, CA (US);
Kaidong Chen, San Ramon, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
Provided is a continuous process for converting waste plastic into recycle for polypropylene polymerization. The process comprises selecting waste plastics containing polyethylene and/or polypropylene and preparing a stable blend of petroleum and the selected plastic. The amount of plastic in the blend comprises no more than 20 wt. % of the blend. The blend is passed to a refinery FCC unit. A liquid petroleum gas Colefin/paraffin mixture is recovered from the FCC unit. The Cparaffins and Colefins are separated into different fractions with the Colefin fraction passed to a propylene polymerization reactor, and the Cparaffin fraction passed optionally to a dehydrogenation unit to produce additional propylene.