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    • 34. 发明申请
    • CHLOROFLUOROCARBON ISOMERIZATION
    • 氯代异构体
    • WO1996011896A1
    • 1996-04-25
    • PCT/US1995013458
    • 1995-10-10
    • E.I. DU PONT DE NEMOURS AND COMPANY
    • E.I. DU PONT DE NEMOURS AND COMPANYKRESPAN, Carl, GeorgePETROV, Viacheslav, AlexandrovichSMART, Bruce, Edmund
    • C07C17/358
    • C07C17/358C07C17/23
    • A process is disclosed for producing a saturated gem-dichloro chlorofluorocarbon product of the formula CnClaFb, wherein n is 2 to 12, a is 2 to 4, and b is 4 to 24, and wherein a + b equals 2n+2 when the chlorofluorocarbon is acyclic and equals 2n when the chlorofluorocarbon is cyclic, from a starting material of the same formula which has a lesser thermodynamic stability than the saturated gem-dichloro chlorofluorocarbon product. The process involves isomerizing the starting material in the presence of (1) a catalyst of the formula AlZ3, where Z is selected from F, Cl and/or Br (provided that AlZ3 cannot be entirely AlF3) and (2) an effective amount of promoter selected from the group consisting of hexafluoropropene, 2-chloropentafluoropropene, perfluorobutenes, perfluoropentenes, perfluorocyclobutene, 1-chlorocyclobutene, 1,2-dichlorocyclobutene, perfluorocyclopentene, 1-chlorocyclopentene, and 1,2-dichlorocyclopentene, and mixtures thereof, to accelerate production of the saturated gem-dichloro chlorofluorocarbon product. Also disclosed is a process for producing a halohydrocarbon of the formula CnHcCldFb from a gem-dichloro product produced by said isomerization (where c is 1 to 4 and c + d equals a) which involves hydrodechlorinating the gem-dichloro product.
    • 公开了一种制备式CnClaFb的饱和偕二氯氯氟烃产物的方法,其中n为2至12,a为2至4,b为4至24,并且其中a + b等于2n + 2,当氯氟烃 当氯氟烃是循环的时,它是非循环的并且等于2n,其来自具有比饱和的偕二氯氯氟烃产物更小的热力学稳定性的相同配方的原料。 该方法包括在(1)式AlZ 3的催化剂存在下异构化原料,其中Z选自F,Cl和/或Br(前提是AlZ 3不能完全是AlF 3)和(2)有效量的 选自六氟丙烯,2-氯五氟丙烯,全氟丁烯,全氟戊烯,全氟环丁烯,1-氯环丁烯,1,2-二氯环丁烯,全氟环戊烯,1-氯环戊烯和1,2-二氯环戊烯的助催化剂及其混合物,以加速生产 饱和的二氯氯氟化碳产品。 还公开了由通过所述异构化生产的偕二氯产物(其中c为1至4且c + d等于a)制备式C n H c C d F b的卤代烃的方法,其涉及氘二氯产物的加氢脱氯。