Process of separating/purifying pentafluoropropane
US6863780B2 · kind B2 · utility
3Cited by
16References
11Claims
0Family size
Inventors
Key dates
| Filing date | Sep 28, 2001 |
| Grant date | Mar 8, 2005 |
| Priority date | — |
| Expiry date | Jan 13, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/383
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is provided an azeotropic mixture having 1,1,1,3,3-pentafluoropropane and hydrogen fluoride. Further, there is provided a process of separating/purifying R-245fa and/or HF from a mixture of R-245fa and HF wherein the mixture of 1,1,1,3,3-pentafluoropropane and hydrogen fluoride is subjected to a distillation step so that a distillate is obtained which has the azeotropic mixture of 1,1,1,3,3-pentafluoropropane and hydrogen fluoride, and a bottom product is obtained which has separated/purified 1,1,1,3,3-pentafluoropropane or hydrogen fluoride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.