ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,663, issued on March 18, was assigned to NESTE OYJ (Espoo, Finland).
"Purification method for biological feedstock" was invented by Olli Visuri (Espoo, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure is related to an apparatus and method for purification of biological feedstock, such as reducing or removing nitrogen containing compounds therein. The method can include subjecting the feedstock to a first separation step for obtaining a first fraction containing free fatty acids and nitrogen containing compounds, and collecting the residue containing acylglycerols. The first fraction is reacted with glycerol to obtain ac...