Process for purifying 1,1,1,2-tetrafluoroethane
US4906796A · kind A · utility
44Cited by
6References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 8, 1989 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Mar 8, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/389
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
R-1122 (2-chloro-1,1-difluoro-ethylene) can be substantially removed from a stream of R-134a over a zeolite or carbon molecular sieve having a mean pore size of about 3.8 to 4.8 Angstroms. Preferred are 5A synthetic zeolites or calcium chabazite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.