US Patent Issued to JS Royal Home USA on Sept. 8 for "Method and system for efficient catalyst-free alcoholysis of waste polyester" (Chinese Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,729,282, issued on Sept. 8, was assigned to JS Royal Home USA Inc. (Charlotte, N.C.).

"Method and system for efficient catalyst-free alcoholysis of waste polyester" was invented by Lei Huang (Jiangyin, China), Zhang Pinfang (Shanghai) and Ding Linqin (Shaoxing City, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An efficient, catalyst-free method and system for waste polyester alcoholysis via a two-stage process. Initially, molten waste polyester undergoes pre-alcoholysis in a multi-stage screw unit using a minimal amount (0.2%-10% mass ratio) of alcoholytic agent to achieve partial depolymerization and a specific intermediate viscosity. After fil...