Synthesis of difluoromethane
US5900514A · kind A · utility
2Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1996 |
| Grant date | May 4, 1999 |
| 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 manufacture of difluoromethane by catalytic gas-phase fluorination of methylene chloride. The operation is carried out in the presence of oxygen at a temperature of between 330 and 450.degree. C. and with a bulk or supported chromium catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.