US Patent Issued to SK CHEMICALS on May 12 for "Method for producing bis-2-hydroxyethyl terephthalate through continuous depolymerization" (South Korean Inventors)

ALEXANDRIA, Va., May 12 -- United States Patent no. 12,624,188, issued on May 12, was assigned to SK CHEMICALS Co. LTD. (Seongnam-si, South Korea).

"Method for producing bis-2-hydroxyethyl terephthalate through continuous depolymerization" was invented by Ji-Hun Kim (Seongnam-si, South Korea), Kwang-Woo Park (Seongnam-si, South Korea), Seong-Ki Lee (Seongnam-si, South Korea), Joong Ki Lee (Seongnam-si, South Korea) and Yuntae Jin (Seongnam-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for producing bis-2-hydroxyethyl terephthalate is disclosed. The method includes the steps of: (1) adding a waste polyester raw material into a co-extruder to obtain a co-extrudate; (2) adding the co-e...