US4128499A
Expired / Lapsed
US
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Lewis acid-fluorine compounds of carbon
Assignee: Imperial Oil Ltd
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Filing: 1976-09-22
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Granted: 1978-12-05
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Expires: 1996-09-22
Abstract
Abstract Novel fluoride salts of carbon are prepared by contacting carbon with elemental fluorine and certain Lewis acids. These salts can be used in forming exfoliated graphite and isomerization catalysts.
Inventors
- 👤 A. David Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:07
CPC Classifications
D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/121; C; C01; C01B; C01B32/00; C01B32/10; C01B32/20; C01B32/21; C01B32/22; C01B32/225; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/536; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2778; C07C5/2786
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
68 words
A composition of matter consisting essentially of carbon containing in combination therewith fluorine and a Lewis acid selected from the group consisting of BF 3 , PF 5 , AsF 5 , SbF 5 , TaF 5 , SiF 4 , SO 3 , PtF 4 , NbF 5 , VF 5 , UF 6 and TiF 4 , said composition being in the form of the solid.
Claim 2
Dependent Claim
68 words
A composition of matter consisting essentially of carbon containing in combination therewith fluorine and a Lewis acid selected from the group consisting of BF 3 , PF 5 , AsF 5 , SbF 5 , TaF 5 , SiF 4 , SO 3 , PtF 4 , NbF 5 , VF 5 , UF 6 and TiF 4 , said composition being in the form of the solid.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein the Lewis acid is BF 3 .
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein the Lewis acid is PF 5 .
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein a Lewis acid is TaF 5 .
Claim 6
Dependent Claim
13 words
The composition of claim 1 wherein the Lewis acid is SO 3 .
Claim 7
Dependent Claim
27 words
The composition of claim 1 wherein the amount of fluorine and Lewis acid combined with carbon ranges from about 0.05 wt. % to about 75 wt. %.
Claim 8
Dependent Claim
125 words
A process for preparing a composition of matter containing carbon and in combinaton therewith fluorine and a Lewis acid comprising: contacting carbon with a Lewis acid selected from the group consisting of BF 3 , PF 5 , AsF 5 , SbF 5 , TaF 5 , SiF 4 , SO 3 , PtF 4 , NbF 5 , VF 5 , UF 6 and TiF 4 and fluorine at a temperature at which the Lewis acid is at least partially fluid for a time sufficient to combine from about 0.05 wt. % to about 75 wt. % of said fluorine and said Lewis acid with said carbon thereby forming a composition of matter containing carbon and in combination therewith fluorine and a Lewis acid.
Claim 9
Dependent Claim
125 words
A process for preparing a composition of matter containing carbon and in combinaton therewith fluorine and a Lewis acid comprising: contacting carbon with a Lewis acid selected from the group consisting of BF 3 , PF 5 , AsF 5 , SbF 5 , TaF 5 , SiF 4 , SO 3 , PtF 4 , NbF 5 , VF 5 , UF 6 and TiF 4 and fluorine at a temperature at which the Lewis acid is at least partially fluid for a time sufficient to combine from about 0.05 wt. % to about 75 wt. % of said fluorine and said Lewis acid with said carbon thereby forming a composition of matter containing carbon and in combination therewith fluorine and a Lewis acid.
Claim 10
Dependent Claim
11 words
The process of claim 7 wherein the carbon contacted is amorphous.
Claim 11
Dependent Claim
10 words
The process of claim 7 wherein the carbon is graphitic.
Claim 12
Dependent Claim
17 words
The process of claim 7 wherein the fluorine and Lewis acid are diluted with an inert gas.
Claim 13
Dependent Claim
17 words
The process of claim 7 wherein the temperatures are in the range of -127° to 625° C.
Claim 14
Dependent Claim
13 words
The process of claim 11 wherein the Lewis acid is BF 3 .
Claim 15
Dependent Claim
99 words
A process for forming exfoliated graphite comprising contacting graphite with fluorine and a Lewis acid selected from the group consisting of BF 3 , PF 5 , AsF 5 , SbF 5 , TaF 5 , SiF 4 , SO 3 , PtF 4 , NbF 5 , VF 5 , UF 6 and TiF 4 for a time sufficient to form a solid composition of matter comprising carbon containing in combination therewith said fluorine and said Lewis acid and thereafter heating the so treated graphite at elevated temperatures so as to decompose the treated graphite thereby exfoliating it.
Claim 16
Dependent Claim
99 words
A process for forming exfoliated graphite comprising contacting graphite with fluorine and a Lewis acid selected from the group consisting of BF 3 , PF 5 , AsF 5 , SbF 5 , TaF 5 , SiF 4 , SO 3 , PtF 4 , NbF 5 , VF 5 , UF 6 and TiF 4 for a time sufficient to form a solid composition of matter comprising carbon containing in combination therewith said fluorine and said Lewis acid and thereafter heating the so treated graphite at elevated temperatures so as to decompose the treated graphite thereby exfoliating it.
Claim 17
Dependent Claim
22 words
The process of claim 13 wherein the Lewis acid is BF 3 and the treated graphite is heated to about 800° C.
Claim 18
Dependent Claim
27 words
The composition of claim 1 wherein the amount of fluorine and Lewis acid combined with carbon ranges from about 20 wt. % to about 45 wt. %.
Claim 19
Dependent Claim
91 words
A composition of matter containing fluorine and a Lewis acid together in combination with graphite in the form a solid, said fluorine and said Lewis acid being present in said composition in the range of from about 20 wt. % to about 45 wt. %, said Lewis acid being selected from the group consisting of BF 3 , PF 5 , AsF 5 , SbF 5 , TaF 5 , SiF 4 , SO 3 , PtF 4 , NbF 5 , VF 5 , UF 6 and TiF 4 .
Claim 20
Dependent Claim
91 words
A composition of matter containing fluorine and a Lewis acid together in combination with graphite in the form a solid, said fluorine and said Lewis acid being present in said composition in the range of from about 20 wt. % to about 45 wt. %, said Lewis acid being selected from the group consisting of BF 3 , PF 5 , AsF 5 , SbF 5 , TaF 5 , SiF 4 , SO 3 , PtF 4 , NbF 5 , VF 5 , UF 6 and TiF 4 .
Claim 21
Dependent Claim
100 words
A composition of matter consisting essentially of carbon having in combination therewith a fluoroanion of a Lewis acid, said composition being a solid and having the general formula C.sub.n.sup.+ X.sup.- wherein C + is carbon; X - is a fluoroanion selected from the group consisting of SO 3 F - , BF 4 - , PF 6 - , TaF 6 - , AsF 6 - , PtF 5 - , SbF 5 - , NbF 6 - , UF 7 - , TiF 5 - and VF 6 - ; and n is an integer between 6 and 24.
Claim 22
Dependent Claim
100 words
A composition of matter consisting essentially of carbon having in combination therewith a fluoroanion of a Lewis acid, said composition being a solid and having the general formula C.sub.n.sup.+ X.sup.- wherein C + is carbon; X - is a fluoroanion selected from the group consisting of SO 3 F - , BF 4 - , PF 6 - , TaF 6 - , AsF 6 - , PtF 5 - , SbF 5 - , NbF 6 - , UF 7 - , TiF 5 - and VF 6 - ; and n is an integer between 6 and 24.
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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) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |