Purification of 1, 1-difluoroethane
US5744661A · kind A · utility
3Cited by
4References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1996 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Oct 7, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for removing unsaturated impurities from 1,1-difluoroethane by intimately contacting the impure 1,1-difluoroethane with sulfuric acid. This process is especially useful for removing one or more unsaturated halocarbons having two carbon atoms such as vinyl chloride, vinyl fluoride and blends thereof from the 1,1-difluoroethane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.