US Patent Issued to NAN YA PLASTICS on March 25 for "Method for improving hue of recycled bis-2-hydroxylethyl terephthalate by using ionic liquids" (Taiwanese Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,453, issued on March 25, was assigned to NAN YA PLASTICS Corp. (Taipei, Taiwan).

"Method for improving hue of recycled bis-2-hydroxylethyl terephthalate by using ionic liquids" was invented by Te-Chao Liao (Taipei, Taiwan), Jung-Jen Chuang (Taipei, Taiwan), Wei-Sheng Cheng (Taipei, Taiwan), Zhang-Jian Huang (Taipei, Taiwan) and Yu-Ti Tseng (Taipei, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for improving hue of recycled bis-2-hydroxylethyl terephthalate by using ionic liquids including providing a recycled polyester fabric; using a chemical de-polymerization liquid to chemically de-polymerize the recycled polyester fabric to for...