公开(公告)号：US20190077733A1

公开(公告)日：2019-03-14

申请号：US16126560

申请日：2018-09-10

Applicant: The Chemours Company FC, LLC

Inventor： Sheng Peng ,  Andrew Jackson ,  Stephan Brandstadter ,  Mario Joseph Nappa

IPC: C07C17/25 ,  C07C21/185 ,  C07C19/12 ,  C07C17/20 ,  B01J31/02 ,  B01J27/10 ,  B01J27/135 ,  B01J23/745

Abstract: Disclosed herein are methods of producing E-CF3CH═CHCF3 in a liquid phase. Also disclosed are methods of preparing CF3CH2CHClCF3 and CF3CHClCH2CCl3.

公开(公告)号：US10227276B2

公开(公告)日：2019-03-12

申请号：US16110464

申请日：2018-08-23

Applicant: THE CHEMOURS COMPANY FC, LLC

Inventor： Ivan Sergeyevich Baldychev ,  Stephan M. Brandstadter ,  Patricia Cheung ,  Mario Joseph Nappa

IPC: C07C17/25 ,  C07C17/354 ,  C07C17/358 ,  C07C17/23 ,  C07C17/281

Abstract: Disclosed is a process for the preparation of cis-1,1,1,4,4,4-hexafluoro-2-butene comprising contacting 1,1,1-trifluorotrichloroethane with hydrogen in the presence of a catalyst comprising ruthenium to produce a product mixture comprising 1316mxx, recovering said 1316mxx as a mixture of Z- and E-isomers, contacting said 1316mxx with hydrogen, in the presence of a catalyst selected from the group consisting of copper on carbon, nickel on carbon, copper and nickel on carbon and copper and palladium on carbon, to produce a second product mixture, comprising E- or Z-CFC-1326mxz, and subjecting said second product mixture to a separation step to provide E- or Z-1326mxz. The E- or Z-1326mxz can be dehydrochlorinated in an aqueous basic solution with an alkali metal hydroxide in the presence of a phase transfer catalyst to produce hexafluoro-2-butyne, which can then be selectively hydrogenated to produce Z-1,1,1,4,4,4-hexafluoro-2-butene using either Lindlar's catalyst, or a palladium catalyst further comprising a lantanide element or silver.