US4057584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing hexafluoropropanone-2
Assignee: Daikin Industries Ltd
•
Filing: 1976-06-11
•
Granted: 1977-11-08
•
Expires: 1996-06-11
Abstract
Abstract A process for preparing hexafluoropropanone-2 from hexafluoropropene by one step reaction which comprises contacting hexafluoropropene and oxygen with a fluorinated alumina as a catalyst.
Inventors
- 👤 Takashi Touzuka
- 👤 Yonosuke Ohsaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:12
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/22; B01J37/26; C; C07; C07C; C07C45/00; C07C45/27; B01J27/00; B01J27/06; B01J27/125
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
42 words
A process for preparing hexafluoropropanone-2 from hexafluoropropene which comprises contacting at a temperature of 80° to 300° C. hexafluoropropene and oxygen in a molar ratio of 1:10-0.1 with a fluorinated alumina containing fluorine in a concentration of 0.5 to 50% by weight.
Claim 2
Dependent Claim
42 words
A process for preparing hexafluoropropanone-2 from hexafluoropropene which comprises contacting at a temperature of 80° to 300° C. hexafluoropropene and oxygen in a molar ratio of 1:10-0.1 with a fluorinated alumina containing fluorine in a concentration of 0.5 to 50% by weight.
Claim 3
Dependent Claim
22 words
The process according to claim 1, wherein the fluorinated alumina is the one prepared by reacting activated alumina with a fluorinating agent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |