US5554739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing carbon materials with diazonium salts and resultant carbon products
Assignee: Cabot Corp
•
Filing: 1994-12-15
•
Granted: 1996-09-10
•
Expires: 2014-12-15
Abstract
Abstract Processes for preparing a carbon product having an organic group attached to a carbon material. The carbon material is selected from graphite powder, a graphite fiber, a carbon fiber, a carbon cloth, a vitreous carbon product, and an activated carbon product. In one process at least one diazonium salt reacts with a carbon material in the absence of an externally applied electric current sufficient to reduce the diazonium salt. In another process at least one diazonium salt reacts with a carbon material in a protic reaction medium.
Inventors
- 👤 James A. Belmont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:41
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/515; C04B35/52; C09; C09C; C09C1/00; C09C1/44; C09C1/46; C09C1/48; C09C1/56; C09C1/565; C09C3/00; C09C3/08; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/037; C09D11/16; C09D11/18; C09D11/30; C09D11/32; C09D11/324; C09D5/00; C09D5/02; C09D5/024; C09D5/028; C09D7/00; C09D7/40; C09D7/41; D; D01; D01F; D01F11/00; D01F11/10; D01F11/14; C01; C01P; C01P2004/00; C01P2004/01; C01P2006/00; C01P2006/12; C01P2006/14; C01P2006/19; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/42; C04B2235/422; C04B2235/424; C04B2235/425
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
68 words
A process for preparing a carbon product having an organic group attached to a carbon material comprising the step of: reacting at least one diazonium salt with a carbon material selected from a graphite powder, a graphite fiber, a carbon fiber, a carbon cloth, a vitreous carbon product, and an activated carbon product in the absence of an externally applied electric current sufficient to reduce the diazonium salt.
Claim 2
Dependent Claim
68 words
A process for preparing a carbon product having an organic group attached to a carbon material comprising the step of: reacting at least one diazonium salt with a carbon material selected from a graphite powder, a graphite fiber, a carbon fiber, a carbon cloth, a vitreous carbon product, and an activated carbon product in the absence of an externally applied electric current sufficient to reduce the diazonium salt.
Claim 3
Dependent Claim
16 words
A process of claim 1 wherein the reacting step is carried out in an aprotic medium.
Claim 4
Dependent Claim
16 words
A process of claim 1 wherein the reacting step is carried out in a protic medium.
Claim 5
Dependent Claim
13 words
A process of claim 1 wherein the diazonium salt is generated in situ.
Claim 6
Dependent Claim
58 words
A process for preparing a carbon product having an organic group attached to a carbon material comprising the step of: reacting at least one diazonium salt with a carbon material selected from a graphite powder, a graphite fiber, a carbon fiber, a carbon cloth, a vitreous carbon product, and an activated carbon product in a protic reaction medium.
Claim 7
Dependent Claim
58 words
A process for preparing a carbon product having an organic group attached to a carbon material comprising the step of: reacting at least one diazonium salt with a carbon material selected from a graphite powder, a graphite fiber, a carbon fiber, a carbon cloth, a vitreous carbon product, and an activated carbon product in a protic reaction medium.
Claim 8
Dependent Claim
17 words
A process of claim 5 wherein the diazonium salt is generated in situ from a primary amine.
Claim 9
Dependent Claim
23 words
A process of claim 6 wherein the diazonium salt is generated in situ by reacting the primary amine, a nitrite and an acid.
Claim 10
Dependent Claim
19 words
A process of claim 7 wherein the nitrite is a metal nitrite and one equivalent of acid is used.
Claim 11
Dependent Claim
30 words
A process of claim 6 wherein the diazonium salt is generated in situ by reacting the primary amine with a nitrite and the primary amine contains a strong acid group.
Claim 12
Dependent Claim
25 words
A process of claim 6 wherein the diazonium salt is generated in situ by reacting the primary amine with an aqueous solution of nitrogen dioxide.
Claim 13
Dependent Claim
235 words
A process of claim 6 wherein the protic medium is an aqueous medium, and the primary amine is an amine of the formula A y ArNH 2 , in which: Ar is an aromatic radical selected from the group consisting of phenyl, naphthyl, anthracenyl, phenanthrenyl, biphenyl, and pyridinyl; A is independently a substituent on the aromatic radical selected from: a functional group selected from the group consisting of OR, COR, COOR, OCOR, COONa, COOK, COO - NR 4 + , halogen, CN, NR 2 , S n , SO 3 H, SO 3 Na, SO 3 K, SO 3 - NR 4 + , NR(COR), CONR 2 , NO 2 , PO 3 H 2 , PO 3 HNa, PO 3 Na 2 , N═NR, N 2 + X - , NR 3 + X - , and PR 3 + X - ; and a linear, branched or cyclic hydrocarbon radical, unsubstituted or substituted with one or more of said functional groups; R is independently hydrogen, C 1 -C 20 alkyl, or aryl; n is an integer from 1 to 8; X - is a halide or an anion derived from a mineral or organic acid; and y is an integer from 1 to 5 when Ar is phenyl, 1 to 7 when Ar is naphthyl, 1 to 9 when Ar is anthracenyl, phenanthrenyl, or biphenyl, or 1 to 4 when Ar is pyridinyl.
Claim 14
Dependent Claim
13 words
A process of claim 5 wherein the diazonium salt is generated in situ.
Claim 15
Dependent Claim
20 words
A process of claim 5 wherein the diazonium salt is generated from a primary amine separately from the reacting step.
Claim 16
Dependent Claim
14 words
A process of claim 5 wherein the protic reaction medium is an aqueous medium.
Claim 17
Dependent Claim
44 words
A process of claim 5 wherein the organic group of the diazonium salt is substituted or unsubstituted and is selected from the group consisting of an aliphatic group, a cyclic organic group, or an organic compound having an aliphatic portion and a cyclic portion.
Claim 18
Dependent Claim
12 words
A process of claim 5 wherein the protic reaction medium is water.
Claim 19
Dependent Claim
13 words
A process of claim 5 wherein the protic medium is an alcohol-based medium.
Claim 20
Dependent Claim
11 words
A carbon product prepared according to the process of claim 1.
Claim 21
Dependent Claim
11 words
A carbon product prepared according to the process of claim 5.
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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) | 1999-09-10 | 2000-03-11 | 2000-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-10 | 2004-03-11 | 2004-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-10 | 2008-03-11 | 2008-09-10 | $7700.00 | Window Closed / Lapsed |