US Patent Issued to FININGS on June 24 for "Aramid polymerization method using carbon dioxide as solvent" (Chinese Inventors)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,325, issued on June 24, was assigned to FININGS Co. LTD. (Huai'an, China).

"Aramid polymerization method using carbon dioxide as solvent" was invented by Nongyue Wang (Huai'an, China), Guoqiang Wen (Huai'an, China), Quanzhong Zhao (Huai'an, China) and Jianming Shao (Huai'an, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is a method for aramid polymerization using carbon dioxide as a solvent, comprising reacting phenylenediamine with benzenedicarbonyl dichloride, wherein an acid-binding agent is added to the reaction system, and liquid carbon dioxide and/or a supercritical carbon dioxide fluid is used as a reaction solvent. Th...