US Patent Issued to Chevron U.S.A. on June 16 for "Circular economy for plastic waste to polypropylene via refinery FCC unit" (California Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,655,077, issued on June 16, was assigned to Chevron U.S.A. Inc. (San Ramon, Calif.).

"Circular economy for plastic waste to polypropylene via refinery FCC unit" was invented by Joel E. Schmidt (San Ramon, Calif.), Hye-Kyung C. Timken (Albany, Calif.), Tengfei Liu (San Ramon, Calif.), Richard L. Grove (San Ramon, Calif.) and Kaidong Chen (San Ramon, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 selec...