Process for purification of olefin feed comprising 1234YF
US11225447B2 · kind B2 · utility
0Cited by
2References
10Claims
0Family size
Inventors
Key dates
| Filing date | May 13, 2019 |
| Grant date | Jan 18, 2022 |
| Priority date | — |
| Expiry date | May 13, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/278
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for purifying olefin feed comprising R-5 1234yf, R-40, R-134a, R-134, R-1225zc, and OFCB, comprising the step of separating different ternary and binary azeotrope compositions comprising 1234yf. The olefin feed is obtained from the pyrolysis of tetrafluoroethylene/chlorodifluoromethane with chloromethane/methane, optionally in presence of initiator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.