ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,180, issued on Sept. 23, was assigned to THE CHEMOURS COMPANY FC LLC (Wilmington, Del.).

"Processes for producing Z-1,1,1,4,4,4-hexafluorobut-2-ene and intermediates for producing same" was invented by Sheng Peng (Hockessin, Del.) and Allen Capron Sievert (Elkton, Md.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Processes for producing Z-1,1,1,4,4,4-hexafluorobut-2-ene and intermediates for producing same. A process for producing 2-chloro-1,1,1,4,4,4-hexafluorobutane comprises contacting 1,1,2,4,4-pentachlorobuta-1,3-diene with HF in the liquid phases. A process for producing E-1,1,1,4,4,4-hexafluorobut-2-ene comprises contacting 2-chloro-1,1,1,4...