| 摘要 |
<p>A method for recovering essentially pure pentafluoroethane [HFC 125] from mixtures thereof with chloropentafluoroethane [CFC 115] comprising extractive distillation using an extractive agent selected from bromochloro-2,2,2-trifluoroethane and perfluorocarbons of 5 or more carbon atoms such as perfluoroalkanes and liquid perfluoropolyethers.</p> |
