Publication number: 20170015607
Abstract: Processes are provided for (i) producing Z-1,1,1,4,4,4-hexafluoro-2-butene (Z—CF3CH?CHCF3) from E-1,1,1,4,4,4-hexafluoro-2-butene (E-CF3CH?CHCF3), comprising the steps of (a) reacting the E-1,1,1,4,4,4-hexafluoro-2-butene (E-CF3CH?CHCF3) with chlorine to form dichloro-1,1,1,4,4,4-hexafluorobutane (CF3CHClCHClCF3), (b) recovering the dichloro-1,1,1,4,4,4-hexafluorobutane from step (a), (c) reacting the recovered dichloro-1,1,1,4,4,4-hexafluorobutane with base to form 1,1,1,4,4,4-hexafluoro-2-butyne (CF3?CCF3), (d) recovering the 1,1,1,4,4,4-hexafluoro-2-butyne from step (c) and (e) reacting the recovered hexafluoro-2-butyne with hydrogen to form said Z-1,1,1,4,4,4-hexafluoro-2-butene, optionally wherein said E-1,1,1,4,4,4-hexafluoro-2-butene starting material is obtained by converting 1,1,1,4,4,4-hexafluoro-2-butane (F3CHCl2) to a mixture of Z-1,1,1,4,4,4-hexafluoro-2-butene and E-1,1,1,4,4,4-hexafluoro-2-butene and recovering the E-1,1,1,4,4,4-hexafluoro-2-butene from said mixture, whereby the E-1,1,1,4,4,4-h
Type:
Application
Filed:
March 18, 2015
Publication date:
January 19, 2017
Inventors:
IVAN SERGEYEVICH BALDYCHEV, STEPHAN M. BRANDSTADTER, MARIO JOSEPH NAPPA, SHENG PENG