Purification of 1,1-dichloro-1-fluoroethane
US5326918A · kind A · utility
6Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1993 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Nov 5, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/395
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a process to remove the unsaturated impurities (in particular vinylidene chloride) present in a crude 1,1-dichloro-1-fluoroethane. This process comprises subjecting the product to be purified, in the liquid phase, in the presence of oxygen, to an irradiation by short wavelength UV rays (200 to 360 nm), then washing with an alkaline and/or reducing solution, and drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.