Process for the manufacture of difluoromethane
US6639115B2 · kind B2 · utility
1Cited by
26References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2001 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | May 17, 2021 |
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.