Process for the separation of 1,1-dichloro-1-fluoroethane and 1,1,1,3,3-pentafluorobutane
US4950364A · kind A · utility
19Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 4, 1989 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | May 4, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/386
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
1,1-Dichloro-1-fluroethane and 1,1,1,3,3-pentafluorobutane are separated from their liquid mixtures, such as liquid mixtures resulting from the hydrofluorination of 1,1,1-trichloroethane or vinylidene chloride. 1,1-Dichloro-1-fluoroethane and 1,1,1,3,3-pentafluorobutane are completely separated by distillation, by adding to the mixture thereof a liquid containing at least about 3 moles of hydrogen fluoride per mole of 1,1-dichloro-1-fluoroethane in the mixture subject to separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.