US4423261A
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Process for producing a graphite fluoride comprising mainly polydicarbon monofluoride represented by the formula (C2 F)n
Assignee: Applied Science Research Institute
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Filing: 1982-01-08
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Granted: 1983-12-27
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Expires: 2002-01-08
Abstract
Abstract A graphite fluoride comprising mainly poly-dicarbon monofluoride represented by the formula (C 2 F) n can be produced in an extremely short period of time by a process comprising reacting a graphite material with fluorine in the presence of a specific fluoride.
Inventors
- 👤 Nobuatsu Watanabe
- 👤 Tsuyoshi Nakajima
- 👤 Masayuki Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:34
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/20; C01B32/21; C01B32/22; C01B32/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
122 words
A process for producing a graphite fluoride comprising mainly poly-dicarbon monofluoride which comprises contacting a graphite material having Franklin's P-value of 0 to 0.4 with fluorine at a temperature in the range of room temperature to about 100° C. in the presence of a fluoride of at least one element selected from the group consisting of alkali metals, alkaline earth metals, elements belonging to Groups I(b), II(b) and III of the periodic table, and elements of the first period of the transition elements; and then heating the resulting reaction system to a temperature in the range of about 300° C. to 500° C., at which temperature the reaction system is maintained until a constant weight of the resulting reaction product is attained.
Claim 2
Dependent Claim
122 words
A process for producing a graphite fluoride comprising mainly poly-dicarbon monofluoride which comprises contacting a graphite material having Franklin's P-value of 0 to 0.4 with fluorine at a temperature in the range of room temperature to about 100° C. in the presence of a fluoride of at least one element selected from the group consisting of alkali metals, alkaline earth metals, elements belonging to Groups I(b), II(b) and III of the periodic table, and elements of the first period of the transition elements; and then heating the resulting reaction system to a temperature in the range of about 300° C. to 500° C., at which temperature the reaction system is maintained until a constant weight of the resulting reaction product is attained.
Claim 3
Dependent Claim
24 words
A process according to claim 1, wherein said fluoride is used in a weight ratio of 0.5 to 2 relative to said graphite material.
Claim 4
Dependent Claim
26 words
A process according to claim 1, wherein the graphite fluoride comprising mainly (C 2 F) n has a F/C ratio of about 0.52 to about 0.82.
Claim 5
Dependent Claim
49 words
A process according to claim 1, wherein the contact of the graphite material and the fluoride with fluorine is effected for at least 10 minutes and the heating to about 300° C. to about 500° C. is effected at a temperature elevation rate of about 2° to 20° C./min.
Claim 6
Dependent Claim
70 words
A process according to claim 1, wherein the contact of the graphite material and the fluoride with fluorine is effected only for a period of time needed for the introduction of fluorine to a reaction system of a graphite material and a fluoride and, immediately thereafter, the heating to about 300° C. to about 500° C. is effected at a temperature elevation rate of about 20° to about 100° C./min.
Claim 7
Dependent Claim
34 words
A process according to claim 1, wherein said group of elements consists of Li, Na, K, Be, Mg, Ca, Sr, Cd, B, Al, Ga, Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn.
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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |