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    • 7. 发明申请
    • HYDROGEN FLUORIDE-HFC-254EB AZEOTROPE AND ITS USES
    • 氢氟化物 - HFC-254EB AZEOOPOPE及其用途
    • US20110101264A1
    • 2011-05-05
    • US12898983
    • 2010-10-06
    • JEFFREY P. KNAPP
    • JEFFREY P. KNAPP
    • C09K5/04C07C17/383
    • C01B7/196C07C17/38C07C17/386C07C19/08
    • Described is a process for separating 1,1,1,2-tetrafluoropropane and hydrogen fluoride from a mixture comprising 1,1,1,2-tetrafluoropropane, 1,1,1,2,3-pentafluoropropane and hydrogen fluoride comprising: subjecting said 1,1,1,2-tetrafluoropropane, 1,1,1,2,3-pentafluoropropane and hydrogen fluoride mixture to a distillation step, forming a column distillate composition comprising an azeotropic or near-azeotropic composition of said 1,1,1,2-tetrafluoropropane and hydrogen fluoride, and a bottoms composition of 1,1,1,2,3-pentafluoropropane. The column distillate may optionally be made essentially free of 1,1,1,2,3-pentafluoropropane and the column bottoms composition may optionally be made essentially free of HF. Also described is a process for separating 1,1,1,2-tetrafluoropropane and hydrogen fluoride from a mixture of 1,1,1,2-tetrafluoropropane and hydrogen fluoride. Also described are azeotropic and azeotrope-like compositions comprising 1,1,1,2-tetrafluoropropane and hydrogen fluoride.
    • 描述了从包含1,1,1,2-四氟丙烷,1,1,1,2,3-五氟丙烷和氟化氢的混合物中分离1,1,1,2-四氟丙烷和氟化氢的方法,包括:对所述 1,1,1,2-四氟丙烷,1,1,1,2,3-五氟丙烷和氟化氢混合物,形成包含共沸或近共沸组合物的塔馏分组合物的所述1,1,1 ,2-四氟丙烷和氟化氢,以及1,1,1,2,3-五氟丙烷的底部组合物。 柱馏分可以任选地基本上不含1,1,1,2,3-五氟丙烷,并且塔底组合物可任选地基本上不含HF。 还描述了从1,1,1,2-四氟丙烷和氟化氢的混合物中分离1,1,1,2-四氟丙烷和氟化氢的方法。 还描述了包含1,1,1,2-四氟丙烷和氟化氢的共沸和类共沸组合物。