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    • 7. 发明授权
    • Production of fluorocarbons employing two catalyst zones
    • 生产采用两个催化剂区的碳氟化合物
    • US4088704A
    • 1978-05-09
    • US761161
    • 1977-01-21
    • Henry R. NychkaRichard E. Eibeck
    • Henry R. NychkaRichard E. Eibeck
    • C07C17/00C07C17/15C07C17/10
    • C07C17/15C07C17/00Y02P20/584
    • Highly chlorinated hydrocarbons having one to three carbons such as CCl.sub.4, C.sub.2 Cl.sub.6 and C.sub.3 Cl.sub.8 are reacted with HF in the presence of a fluorination catalyst such as gamma aluminum fluoride. The effluent is reacted with unhalogenated or underhalogenated hydrocarbons having 1 to 3 carbons, such as CH.sub.4, CH.sub.3 Cl, C.sub.2 H.sub.5 Cl, C.sub.2 H.sub.6, CH.sub.2 .dbd.CHCl and CFCl.dbd.CCl.sub.2, and O.sub.2 in the presence of an oxychlorination catalyst, such as cupric chloride with alkali halide or alkaline earth halide promoters on alpha aluminum fluoride. Fluorocarbons having 1 to 3 carbons such as CCl.sub.2 F.sub.2, C.sub.2 Cl.sub.3 F.sub.3 and C.sub.2 Cl.sub.2 F.sub.4 are separated from the effluent. Preferably, highly chlorinated materials are recycled onto the fluorination catalyst and underhalogenated materials are recycled onto the oxychlorination catalyst.
    • 在氟化催化剂如γ-氟化铝的存在下,将具有一至三个碳的高氯代烃如CCl4,C2Cl6和C3Cl8与HF反应。 将流出物与具有1至3个碳原子的未卤化或卤代烃反应,例如CH 4,CH 3 Cl,C 2 H 5 Cl,C 2 H 6,CH 2 = CHCl和CFCl = CCl 2,和O 2在氧氯化催化剂如氯化铜与碱 卤化物或碱土卤化物助剂在α氟化铝上。 具有1至3个碳的碳氟化合物如CCl 2 F 2,C 2 Cl 3 F 3和C 2 Cl 2 F 4与流出物分离。 优选地,将高度氯化的材料再循环到氟化催化剂上,并将卤代化物质再循环到氧氯化催化剂上。