US6479028B1
Expired / Lapsed
US
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Rapid synthesis of carbon nanotubes and carbon encapsulated metal nanoparticles by a displacement reaction
Assignee: University of California
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Filing: 2000-04-03
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Granted: 2002-11-12
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Expires: 2020-04-03
Abstract
Abstract Carbon material having at least a partially curved structure, such as a nanotube, produced by a displacement reaction in which a carbon halide, e.g. C2Cl6, is reacted with a metal compound, e.g., lithium acetylide in the presence of a catalyst, e.g., CoCl2. Some applications of the nanotubes of the present invention are use in magnetic data storage media, or use as conductors or semiconductors.
Inventors
- 👤 Richard B. Kaner
- 👤 Jennifer L. O'Loughlin
- 👤 Ching-Hwa Kiang
- 👤 Charles H. Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:54
CPC Classifications
B; B82; B82Y; B82Y30/00; C; C01; C01B; C01B32/00; C01B32/15; C01B32/158; C01B32/16; C01B32/162; B82Y10/00; B82Y40/00; C01B2202/00; C01B2202/02; C01B2202/06; Y; Y10; Y10S; Y10S977/00; Y10S977/70; Y10S977/773; Y10S977/832; Y10S977/835; Y10S977/84; Y10S977/842; Y10S977/843; Y10S977/895; Y10S977/896; Y10S977/902; Y10S977/932; Y10S977/948
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
50 words
A displacement process for preparing a form of carbon comprising: reacting a carbon compound with a compound containing metal and carbon in the presence of a catalytically effective amount of catalyst, thereby producing a form of carbon selected from the group consisting of nanotubes, encapsulated metal, or a combination thereof.
Claim 2
Dependent Claim
50 words
A displacement process for preparing a form of carbon comprising: reacting a carbon compound with a compound containing metal and carbon in the presence of a catalytically effective amount of catalyst, thereby producing a form of carbon selected from the group consisting of nanotubes, encapsulated metal, or a combination thereof.
Claim 3
Dependent Claim
18 words
The process of claim wherein said carbon compound is a halogenated hydrocarbon, a halogenated carbon or a hydrocarbon.
Claim 4
Dependent Claim
21 words
The process of claim 2 , wherein said halide is selected from the group consisting of fluorine, chlorine, bromine, and iodine.
Claim 5
Dependent Claim
12 words
The process of claim 1 , wherein said carbon compound is hexachloroethane.
Claim 6
Dependent Claim
16 words
The process of claim 1 , wherein said metal compound is capable of forming a salt.
Claim 7
Dependent Claim
47 words
The process of claim 1 , wherein said metal compound comprises an element selected from the group consisting of Group 1 elements Li, Na, K, Rb, and Cs; Group 2 elements Be, Mg, Ca, Sr, and Ba, and Group 13 elements B, Al, Ga, In, and Tl.
Claim 8
Dependent Claim
13 words
The process of claim 6 , wherein said metal carbide is lithium acetylide.
Claim 9
Dependent Claim
13 words
The process of claim 7 , wherein said catalyst is CoCl 2 .
Claim 10
Dependent Claim
14 words
The process of claim 1 , wherein said metal compound is a metal carbide.
Claim 11
Dependent Claim
26 words
The process of claim 1 , wherein said catalyst is selected from the group consisting of CoCl 2 , NiCl 2 , or FeCl 3 .
Claim 12
Dependent Claim
31 words
The process of claim 10 , wherein said effective amount is 5 mole % based on the moles of total carbon in the carbon compound and compound containing metal and carbon.
Claim 13
Dependent Claim
15 words
The process of claim 1 , further comprising heating the reaction, thereby initiating the reaction.
Claim 14
Dependent Claim
14 words
The process of claim 1 , further comprising adding a salt to the reaction.
Claim 15
Dependent Claim
13 words
The process of claim 13 , wherein the salt is NaCl or LiCl.
Claim 16
Dependent Claim
11 words
The process of claim 1 , wherein the nanotubes are single-walled.
Claim 17
Dependent Claim
11 words
The process of claim 1 , wherein the nanotubes are multi-walled.
Claim 18
Dependent Claim
37 words
A displacement process for preparing a form of carbon comprising reacting a carbon compound with a compound containing metal and carbon in the presence of a catalytically effective amount of catalyst so as to produce carbon nanotubes.
Claim 19
Dependent Claim
37 words
A displacement process for preparing a form of carbon comprising reacting a carbon compound with a compound containing metal and carbon in the presence of a catalytically effective amount of catalyst so as to produce carbon nanotubes.
References Cited (Backward Citations)
US5707916A
Cited
US5578543A
Cited
US5589152A
Cited
US5110768A
Cited
US5747161A
Cited
US5457343A
Cited
US5641466A
Cited
US5783263A
Cited
US5456986A
Cited
US5474591A
Cited
US5472749A
Cited
US5716708A
Cited
US5780101A
Cited
US5869626A
Cited
US5851417A
Cited
US6183714B1
Cited
US5814370A
Cited
US5834057A
Cited
US5850064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-11-11 | 2006-05-13 | 2006-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-11-11 | 2010-05-13 | 2010-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-11-11 | 2014-05-13 | 2014-11-12 | $7700.00 | Window Closed / Lapsed |