US3904501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorine plasma synthesis for carbon monofluorides
Assignee: Massachusetts Institute of Technology
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Filing: 1973-10-04
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Granted: 1975-09-09
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Expires: 1993-10-04
Abstract
Abstract A new preparation for carbon monofluorides, including those species having superstoichiometric ratios of fluorine to carbon, is disclosed. In the synthesis, graphitized carbon can be used as a source of carbon and fluorine plasma is used as a source of activated fluorine atoms. The reaction is conveniently carried out by suspending graphite flakes in a flow of fluorine gas within a fluidized bed reactor, and by applying a radio frequency field across the reactor to produce fluorine plasma. Various carbon monofluorides are produced including carbon monofluorides having superstoichiometric fluorine to carbon ratios. Carbon monofluorides are known to be useful as solid lubricants under extreme environmental conditions, and as cathode materials in high energy batteries.
Inventors
- 👤 Richard J Lagow
- 👤 Raymond F Baddour
- 👤 David K Lam
- 👤 Lawrence A Shimp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:56
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/42; C; C01; C01B; C01B32/00; C01B32/10; B01J2219/00; B01J2219/08; B01J2219/0894
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
15 words
A PROCESS FOR PREPARING CARBON MONOFLOURIDE COMPRISING CONTACTING A SOURCE OF CARBON WITH FLOURIDE PLASMA.
Claim 2
Dependent Claim
15 words
A PROCESS FOR PREPARING CARBON MONOFLOURIDE COMPRISING CONTACTING A SOURCE OF CARBON WITH FLOURIDE PLASMA.
Claim 3
Dependent Claim
17 words
A process of claim 1 wherein said fluorine plasma has a gas temperature of below about 640*C.
Claim 4
Dependent Claim
11 words
A process of claim 2 wherein said carbon comprises graphitized carbon.
Claim 5
Dependent Claim
27 words
A process of claim 3 wherein said fluorine plasma is formed by applying a radio frequency field across a flow of fluorine gas at a low pressure.
Claim 6
Dependent Claim
15 words
A process of claim 4 wherein said fluorine gas is mixed with an inert gas.
Claim 7
Dependent Claim
11 words
A process of claim 5 wherein said inert gas comprises argon.
Claim 8
Dependent Claim
20 words
A process of claim 6 wherein said fluorine plasma has a gas temperature of between about 100*C. and about 150*C.
Claim 9
Dependent Claim
13 words
A process of claim 7 wherein said source of carbon comprises graphite flakes.
Claim 10
Dependent Claim
53 words
A process for preparing carbon monofluoride, comprising: a. establishing a flow of fluorine gas; b. suspending a source of carbon in said flow of fluorine gas; and, c. applying an activating radio frequency field across said flow of fluorine gas to thereby create a fluorine plasma having a gas temperature of below 640*C.
Claim 11
Dependent Claim
53 words
A process for preparing carbon monofluoride, comprising: a. establishing a flow of fluorine gas; b. suspending a source of carbon in said flow of fluorine gas; and, c. applying an activating radio frequency field across said flow of fluorine gas to thereby create a fluorine plasma having a gas temperature of below 640*C.
Claim 12
Dependent Claim
12 words
A process of claim 9 wherein said carbon comprises finely divided carbon.
Claim 13
Dependent Claim
13 words
A process of claim 10 wherein said finely divided carbon comprises graphite flakes.
Claim 14
Dependent Claim
22 words
In a process for preparing carbon monofluoride by contacting a source of carbon with fluorine gas: the improvement comprising using fluorine plasma.
Claim 15
Dependent Claim
22 words
In a process for preparing carbon monofluoride by contacting a source of carbon with fluorine gas: the improvement comprising using fluorine plasma.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |