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    • 72. 发明授权
    • Process for the manufacture of fluoroolefins
    • 制备氟烯烃的方法
    • US06624337B1
    • 2003-09-23
    • US09979784
    • 2001-11-21
    • Leo E. ManzerCynthia A. Lundgren
    • Leo E. ManzerCynthia A. Lundgren
    • C07C2118
    • C25B3/08C07C17/275C07C17/361C07C21/18C07C21/185C07C23/06
    • 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.
    • 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。