Process for the manufacture of fluoroolefins
    73.
    发明授权
    Process for the manufacture of fluoroolefins 有权
    制备氟烯烃的方法

    公开(公告)号:US06624337B1

    公开(公告)日:2003-09-23

    申请号:US09979784

    申请日:2001-11-21

    IPC分类号: C07C2118

    摘要: A process is disclosed for producing perfluoroolefins of the formula CF(R1f)═CF2, where R1f is F or CF3. The process involves (a) perfluorinating cyclobutanes of the formula where R2f is F or CF3, and where one R1 is H and the other R1 is H when R1f is F and is CH3 when R1f is CF3, by the Simons electrochemical fluorination process in an electrochemical cell in a solution of anhydrous liquid hydrogen fluoride under temperature and pressure conditions sufficient to replace all hydrogens in the cyclobutane of the above formula with fluorine; and (b) cracking the perfluorinated cyclobutane. A disclosed cracking involves contacting the perfluorinated cyclobutanes with carbon or a conductive metal, which is heated by induction heating to a temperature sufficient to crack the perfluorinated cyclobutanes.

    摘要翻译: 公开了制备式CF(R f)= CF 2的全氟烯烃的方法,其中R 1 f是F或CF 3。 该方法包括(a)全氟化式R 2 f的环丁烷是F或CF 3,其中一个R 1是H,另一个R 1是H,当R 1是F时,是CH 当R 1 f为CF 3时,通过Simons电化学氟化法在电化学电池中在无水液体氟化氢溶液中的温度和压力条件下,足以用氟代替上式的环丁烷中的所有氢; 和(b)裂化全氟化环丁烷。 所公开的裂解包括使全氟化环丁烷与碳或导电金属接触,所述碳或导电金属通过感应加热被加热至足以裂解全氟化环丁烷的温度。

    Manufacture of 1,1,1,2-tetrafluoroethane
    79.
    发明授权
    Manufacture of 1,1,1,2-tetrafluoroethane 失效
    1,1,1,2-四氟乙烷的制造

    公开(公告)号:US5345016A

    公开(公告)日:1994-09-06

    申请号:US12847

    申请日:1993-02-04

    申请人: Leo E. Manzer

    发明人: Leo E. Manzer

    CPC分类号: C07C17/21 C07C17/206

    摘要: This invention provides an improved process for the manufacture of 1,1,1,2-tetrafluoroethane by the reaction of HF and trichloroethylene in the presence of a catalyst to form a mixture comprising 2-chloro-1,1,1-trifluoroethane and 1,1,1,2-tetrafluoroethane and, optionally, other organic by-products. The improvement resides in conducting the reaction in a single reaction zone while recovering the 1,1,1,2-tetrafluoroethane from the mixture and recycling the 2-chloro-1,1,1-trifluoroethane and, optionally, other organic by-products from the mixture to the reaction along with trichloroethylene and HF.

    摘要翻译: 本发明提供了在催化剂存在下通过HF和三氯乙烯的反应制备1,1,1,2-四氟乙烷的改进方法,以形成包含2-氯-1,1,1-三氟乙烷和1 ,1,1,2-四氟乙烷和任选的其它有机副产物。 改进在于在单个反应区中进行反应,同时从混合物中回收1,1,1,2-四氟乙烷并循环使用2-氯-1,1,1-三氟乙烷和任选的其它有机副产物 从混合物到三氯乙烯和HF的反应。