Process for the manufacture of difluoromethane
US6242659A · kind A · utility
5Cited by
25References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1996 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Jun 14, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/206
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to the synthesis of difluoromethane by gas-phase catalytic fluorination of methylene chloride. To lengthen the lifetime of the catalyst the operation is carried out in the presence of chlorine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.