US Patent Issued to DAIKIN INDUSTRIES on Sept. 8 for "Method for producing purified trans-1,2-difluoroethylene (HFO-1132(E)) and/or 1,1,2-trifluoroethylene (HFO-1123)" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,729,172, issued on Sept. 8, was assigned to DAIKIN INDUSTRIES LTD. (Osaka, Japan).

"Method for producing purified trans-1,2-difluoroethylene (HFO-1132(E)) and/or 1,1,2-trifluoroethylene (HFO-1123)" was invented by Atsushi Noguchi (Osaka, Japan), Tatsuya Takakuwa (Osaka, Japan) and Akikazu Tabuchi (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a method for producing purified trans-1,2-difluoroethylene (HFO-1132(E)) and/or 1,1,2-trifluoroethylene (HFO-1123), comprising a distillation step of distilling composition 1 comprising difluoromethane (HFC-32) and HFO-1132(E) and/or HFO-1123 to obtain composition 2 in ...