[EN] INTEGRATED PROCESS FOR THE PRODUCTION OF Z-1,1,1,4,4,4-HEXAFLUORO-2-BUTENE<br/>[FR] PROCÉDÉ INTÉGRÉ DE PRODUCTION DE Z-1,1,1,4,4,4-HEXAFLUORO-2-BUTÈNE
申请人:DU PONT
公开号:WO2015120250A1
公开(公告)日:2015-08-13
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 using either Lindlar's catalyst, or a palladium catalyst further comprising a lantanide element or silver.
公开了一种制备顺式-1,1,1,4,4,4-六氟-2-丁烯的方法,包括将1,1,1-三氟三氯乙烷与氢气接触,在钌催化剂存在下产生包含1316mxx的产物混合物,将所述1316mxx作为Z-和E-异构体的混合物回收,将所述1316mxx与氢气接触,在选择自碳上的铜、碳上的镍、碳上的铜和镍、碳上的铜和钯的催化剂组成的群中的催化剂存在下,产生包含E-或Z-CFC-1326mxz的第二产物混合物,并将所述第二产物混合物经过分离步骤,以提供E-或Z-1326mxz。E-或Z-1326mxz可以在碱性水溶液中与碱金属氢氧化物一起经过膜相转移催化剂脱氯化,产生六氟-2-丁炔,然后可以选择性地加氢,使用Lindlar的催化剂,或进一步包含镧系元素或银的钯催化剂,产生Z-1,1,1,4,4,4-六氟-2-丁烯。