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    • 3. 发明授权
    • Process for separating and recovering fluorocarbons and hydrogen
fluoride from mixtures thereof
    • 从其混合物中分离和回收碳氟化合物和氟化氢的方法
    • US5196616A
    • 1993-03-23
    • US779534
    • 1991-10-18
    • Kung H. LeeDomenic J. BarsottiEdward K. Sakata
    • Kung H. LeeDomenic J. BarsottiEdward K. Sakata
    • C01B7/19C07C17/38C07C19/08
    • C01B7/195C07C17/38Y02P20/582
    • A process for separating and recovering an organic phase (e.g., fluorocarbons such as chlorofluorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons and perfluorocarbons) from a feed stream of a mixture of fluorocarbons and hydrogen fluoride, wherein the mixture is characterized as forming at least one azeotrope or azeotrope-like composition involving at least one fluorocarbon and hydrogen fluoride, by passing the fluorocarbon/HF mixture feed stream through the feed side of a semipermeable membrane unit and then further separating a fluorocarbon-depleted hydrogen fluoride permeate stream and a fluorocarbon enriched residual stream exiting the membrane unit by conventional distillation. An essentially pure fluorocarbon phase and hydrogen fluoride phase are recovered from the distillation with the azeotrope or azeotrope-like distillate being recycled to the inlet of the semipermeable membrane unit.
    • 从碳氟化合物和氟化氢的混合物的进料流中分离和回收有机相的方法(例如氟碳化合物如氯氟烃,氢氯氟烃,氢氟烃和全氟化碳),其中该混合物的特征在于形成至少一种共沸物或共沸物 - 通过使氟碳化合物/ HF混合物进料流通过半透膜单元的进料侧,然后进一步分离氟化碳贫化的氟化氢渗透物流和离开膜的氟化碳富集的残留物流,其包含至少一种氟碳化合物和氟化氢 单位通过常规蒸馏。 从蒸馏中回收基本上纯的碳氟化合物相和氟化氢相,其中共沸物或类似共沸物的馏出物被再循环到半透膜单元的入口。