Method for coproducing difluoromethane and 1,1,1,2-tetrafluoroethane
US5750810A · kind A · utility
1Cited by
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11Claims
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Assignee
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Key dates
| Filing date | Jul 30, 1997 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Jul 30, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/269
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to the simultaneous manufacture of difluoromethane (F32) and 1,1,1,2-tetrafluoroethane (F134a) by pyrolysis of chlorodifluoromethane in the presence of hydrogen, working at a temperature above 500.degree. C. in the absence of any catalyst or metal surface. Depending on the operating conditions chosen, this process also makes it possible predominantly to manufacture either F134a or F32.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.