Method for purifying 1,1,1,2,3-pentafluoropropane and use thereof for obtaining high-purity 2,3,3,3-tetrafluoropropene
US11168044B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Jan 4, 2019 |
| Grant date | Nov 9, 2021 |
| Priority date | — |
| Expiry date | Jan 4, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for purifying 1,1,1,2,3-pentafluoropropane, comprising the steps of: i) providing a composition A1 comprising 1,1,1,2,3-pentafluoropropane and 1,1,1,3-tetrafluoropropane; ii) purifying, preferably distilling, said composition A1 under conditions that are sufficient to form at least two streams including a first stream comprising 1,1,1,2,3-pentafluoropropane and a second stream comprising 1,1,1,3-tetrafluoropropane. The present invention also relates to a process for producing 2,3,3,3-tetrafluoropropene and a composition comprising 2,3,3,3-tetrafluoropropene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.