ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,466,780, issued on Nov. 11, was assigned to Chempet S.r.l (Cerano, Italy).
"Process for purifying bis(2-hydroxyethyl)terephthalate" was invented by Guido Fragiacomo (Cerano, Italy), Marco Casarotti (Cerano, Italy) and Gianluigi Noja (Cerano, Italy).
According to the abstract* released by the U.S. Patent & Trademark Office: "Process for purifying bis(2-hydroxyethyl)terephthalate (BHET) obtained from depolymerization of a polyethylene terephthalate (PET) waste, the process comprising: treating said solution with at least one oxidizing agent at a temperature of from 30deg C. to 100deg C., preferably from 50deg C. to 90deg C., to obtain an oxidized solution; treating the oxidized solutio...