Removal of unsaturated carbon compounds from 1,1-dichloro-1-fluoroethane
US4948479A · kind A · utility
24Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Jun 7, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/395
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Liquid 1,1-dichloro-1-fluoroethane containing contaminating unsaturated carbon compounds is treated with chlorine and ultraviolet light to convert the unsaturated contaminants to photochlorination products. The photochlorination products are thereafter separated from 1,1-dichloro-1-fluoroethane, such as by distillation. The process is particularly useful in separating vinylidene chloride from 1,1-dichloro-1-fluoroethane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.