Process for the purification of pentafluoroethane
US9975825B1 · kind B1 · utility
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8Claims
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Key dates
| Filing date | Apr 11, 2016 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Apr 11, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/386
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the purification of pentafluoroethane (R125) containing chloropentafluoroethane (R115). The mixture to be purified is subjected to an extractive distillation, the extractant being selected from dimethylformamide (DMF), dioxane, dimethylsulphoxide (DMSO) and diethylsulphoxide (DESO).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.