US Patent Issued on Nov. 18 for "Method of manufacturing for terephthalic acid using polyethylene terephthalate with high degree of polymerization more than 0.75 dl/g of intrinsic viscosity" (South Korean Inventor)

ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,418, issued on Nov. 18.

"Method of manufacturing for terephthalic acid using polyethylene terephthalate with high degree of polymerization more than 0.75 dl/g of intrinsic viscosity" was invented by Yong-Bum Kim (Seoul, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a method for production of terephthalic acid using high polymerization degree polyethylene terephthalate, which includes: (i) introducing high polymerization degree polyethylene terephthalate having an intrinsic viscosity of 0.75 dl/g or more into a continuous reactor, and then heating and pressurizing the same to prepare a fluidal polyethylen...