US3622635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of oxygen-containing fluoro compounds
Assignee: Montedison SpA
•
Filing: 1968-09-06
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Granted: 1971-11-23
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Expires: 1988-09-06
Abstract
Abstract Process for producing polyoxyperfluoromethylene polymers, carbonylfluoride and C2F4O wherein tetrafluoroethylene is reacted with molecular oxygen in the presence of ozone in a liquid reaction medium from the group of fluorinated and chlorofluorinated organic compounds at a temperature between substantially 10* and 40* C. and at an absolute pressure between substantially 700 and 800 mm./Hg.; the molar ratio C2F4 : O2 ranges between substantially 1 and 2.5 (preferably 1.5 to 2) and the molar ratio C2F4 : O3 ranges between substantially 10 and 500 (preferably 100 to 400).
Inventors
- 👤 Franco Gozzo
- 👤 Venanzio Oprandi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:32
CPC Classifications
C; C08; C08G; C08G67/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
16 words
The process defined in claim 1 wherein the molar ratio C2F4: O2 is 1.5 to 2.
Claim 2
Dependent Claim
17 words
The process defined in claim 1 wherein the molar ratio C2F4: O3 is between 100 and 400.
Claim 3
Dependent Claim
18 words
The process defined in claim 1 wherein the reaction is carried out at substantially ambient temperature anD pressure.
Claim 4
Dependent Claim
36 words
The process defined in claim 1 further comprising the step of collecting an effluent gas mixture above said reaction medium and recovering from said mixture carbonylfluoride and tetrafluoroethylene, and recycling said tetrafluoroethylene to the reaction system.
Claim 5
Dependent Claim
36 words
The process defined in claim 1 further comprising the step of collecting an effluent gas mixture above said reaction medium and recovering from said mixture C2F4O and tetrafluoroethylene, and recycling said tetrafluoroethylene to the reaction system.
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Cited
US3451908A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |