ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,914, issued on April 14, was assigned to NESTE OYJ (Espoo, Finland).
"Method of treating waste plastic" was invented by Mika P. Kettunen (Porvoo, Finland), Eija Koivusalmi (Porvoo, Finland), Ville Paasikallio (Porvoo, Finland) and Pekka Aalto (Porvoo, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of upgrading liquefied waste plastic (LWP) to a mixture of purified hydrocarbons is hereby provided. The method includes the steps of providing a feed including liquefied waste plastic (LWP) and a vacuum gas oil (VGO) stream and/or a heavy gas oil (HGO) stream to form a mixed stream, subjecting the mixed stream to hydrotreatment for remov...