ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,347, issued on Dec. 9, was assigned to REFINITI Ltd. (Oxfordshire, Great Britain).

"Process of upgrading a pyrolysis oil and upgrading solution used therein" was invented by Zhaoxi Zhang (Kidlington, Great Britain) and Benjamin Paul Williams (Kidlington, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A process for upgrading a pyrolysis oil comprising treating the pyrolysis oil with an upgrading solution to provide a mixture comprising an extract phase and a raffinate phase, wherein the upgrading solution comprises a polar organic solvent, and wherein the pyrolysis oil is a derived from the pyrolysis of plastic or rubber, or a combinatio...