US4366085A
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Fibrous activated carbon with metal chelate compound supported thereon, process for producing the same
Assignee: Teijin Ltd
•
Filing: 1980-11-14
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Granted: 1982-12-28
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Expires: 2000-11-14
Abstract
Abstract A fibrous activated carbon with a metal chelate compound supported thereon which is suitable for removal of toxic substances in gas. This activated carbon is obtained by attaching a solution or dispersion of the metal chelate compound onto the fibrous activated carbon followed by drying. Contacting the activated carbon with a toxic substance-containing gas provides very efficient removal of the toxic substance from the gas.
Inventors
- 👤 Shigeru Ikegami
- 👤 Yoshihumi Kawakatsu
- 👤 Minoru Hirai
- 👤 Kazuo Izumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:07
CPC Classifications
D; D01; D01F; D01F11/00; D01F11/10; D01F11/14; B; B01; B01D; B01D53/00; B01D53/02; D01F11/12; D01F11/127; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
35 words
Fibrous activated carbon with a metal chelate compound supported thereon, wherein the specific surface area of the fibrous activated carbon with the metal chelate compound supported thereon is at least about 500 m 2 /g.
Claim 2
Dependent Claim
35 words
Fibrous activated carbon with a metal chelate compound supported thereon, wherein the specific surface area of the fibrous activated carbon with the metal chelate compound supported thereon is at least about 500 m 2 /g.
Claim 3
Dependent Claim
30 words
Fibrous activated carbon as in claim 1 wherein the metal chelate comprises at least one metal selected from Groups Ib, IIa, IIb, VIa, VIIa and VIII of the Periodic Table.
Claim 4
Dependent Claim
33 words
Fibrous activated carbon as in claim 1 wherein the metal chelate comprises at least one metal selected from the group consisting of Cu, Ag, Zn, Ca, Cr, Mn, Co, Ni, Pd and Fe.
Claim 5
Dependent Claim
40 words
Fibrous activated carbon as in claim 1 wherein the chelate is derived from at least one chelating agent selected from the group consisting of ethylenediaminetetraacetic acid, nitrilotriacetic acid, trans-1,2-cyclohexadiaminetetraacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid, glycoletherdiaminetetraacetic acid, iminodiacetic acid, and N,N-ethylenebis(γ-o-hydroxyphenyl)glycine.
Claim 6
Dependent Claim
22 words
Fibrous activated carbon as in claim 1 wherein the benzene adsorption rate constant of the fibrous activated carbon is at least 0.2/min.
Claim 7
Dependent Claim
23 words
Fibrous activated carbon as in claim 1 wherein the fiber strength of the fibrous activated carbon is at least 15 kg/mm 2 .
Claim 8
Dependent Claim
21 words
Fibrous activated carbon as in claim 1 wherein the diameter of the fibrous activated carbon is about 3μ to about 25μ.
Claim 9
Dependent Claim
40 words
Fibrous activated carbon as in claim 1 wherein the amount of the metal chelate compound supported is from 0.01% to 30% by weight, based on the total weight of the fibrous activated carbon and the metal chelate compound supported thereon.
Claim 10
Dependent Claim
21 words
Fibrous activated carbon as in claim 1 wherein the fibrous activated carbon is an activated carbon obtained from a polyacrylonitrile fiber.
Claim 11
Dependent Claim
58 words
A process for producing fiberous activated carbon with a metal chelate compound supported thereon which comprises attaching a solution of dispersion of the metal chelate compound onto fibrous activated carbon and then drying, wherein the specific surface area of the fibrous activated carbon with the metal chelate compound supported thereon is at least about 500 m 2 /g.
Claim 12
Dependent Claim
58 words
A process for producing fiberous activated carbon with a metal chelate compound supported thereon which comprises attaching a solution of dispersion of the metal chelate compound onto fibrous activated carbon and then drying, wherein the specific surface area of the fibrous activated carbon with the metal chelate compound supported thereon is at least about 500 m 2 /g.
Claim 13
Dependent Claim
29 words
A process as in claim 10 wherein the metal chelate comprises at least one metal selected from Groups Ib, IIa, IIb, VIa, VIIa and VIII of the Periodic Table.
Claim 14
Dependent Claim
32 words
A process as in claim 10 wherein the metal chelate comprises at least one metal selected from the group consisting of Cu, Ag, Zn, Ca, Cr, Mn, Co, Ni, Pd and Fe.
Claim 15
Dependent Claim
38 words
A process as in claim 10 wherein the metal chelate comprises at least one chelating agent selected from the group consisting of ethylenediaminetetraacetic acid, nitrilotriacetic acid, trans-1,2-cyclohexadiaminetetraacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid, glycoletherdiaminetetraacetic acid, iminodiacetic acid and N,N-ethylene-bis(γ-o-hydroxyphenyl)glycine.
Claim 16
Dependent Claim
31 words
A process as in claim 10 wherein the solution of the metal chelate compound is adjusted to a pH of from 4 to 8 by use of an alkaline aqueous solution.
Claim 17
Dependent Claim
65 words
A process for producing fibrous activated carbon with a metal chelate compound supported thereon, comprising attaching a solution of a chelating agent into fibrous activated carbon, then attaching a solution of a metal onto the fibrous activated carbon, and drying, wherein the specific surface area of the fibrous activated carbon with the metal chelate compound supported thereon is at least about 500 m 2 /g.
Claim 18
Dependent Claim
65 words
A process for producing fibrous activated carbon with a metal chelate compound supported thereon, comprising attaching a solution of a chelating agent into fibrous activated carbon, then attaching a solution of a metal onto the fibrous activated carbon, and drying, wherein the specific surface area of the fibrous activated carbon with the metal chelate compound supported thereon is at least about 500 m 2 /g.
Claim 19
Dependent Claim
43 words
A process as in claim 15 wherein the concentration of the chelating agent in the solution is from about 0.01 wt% to 10 wt%, and the concentration of the metal salt in the aqueous solution is from about 0.01 wt% to 10 wt%.
Claim 20
Dependent Claim
47 words
An agent for removal of toxic substances in gas, which comprises a fibrous activated carbon with a metal chelate compound supported thereon, wherein the specific surface area of the fibrous activated carbon with the metal chelate compound supported thereon is at least about 500 m 2 /g.
Claim 21
Dependent Claim
47 words
An agent for removal of toxic substances in gas, which comprises a fibrous activated carbon with a metal chelate compound supported thereon, wherein the specific surface area of the fibrous activated carbon with the metal chelate compound supported thereon is at least about 500 m 2 /g.
Claim 22
Dependent Claim
31 words
A process as in claim 10 or 14 wherein the ratio by volume of the activated carbon to the dispersion or solution of metal chelate compound is from 1:10 to 1:200.
Claim 23
Dependent Claim
40 words
A fibrous activated carbon as in claim 1 wherein the amount of metal chelate compound supported is from 0.1 to 20% by weight, based on the total weight of the fibrous activated carbon and the metal chelate compound supported thereon.
Claim 24
Dependent Claim
31 words
A fibrous activated carbon as in claim 1 wherein the specific surface area of the fibrous activated carbon with metal chelate compound supported thereon is more than 800 m 2 /g.
Claim 25
Dependent Claim
36 words
The process of claim 10, wherein the amount of metal chelate compound supported is from 0.1 to 20 wt%, based on a total weight of the fibrous activated carbon and the metal chelate compound supported thereon.
Claim 26
Dependent Claim
36 words
The process of claim 15, wherein the amount of metal chelate compound supported is from 0.1 to 20 wt%, based on a total weight of the fibrous activated carbon and the metal chelate compound supported therein.
Claim 27
Dependent Claim
36 words
The agent of claim 17, wherein the amount of metal chelate compound supported is from 0.1 to 20 wt%, based on a total weight of the fibrous activated carbon and the metal chelate compound supported thereon.
Claim 28
Dependent Claim
28 words
The agent of claim 17, wherein the metal chelate comprises at least one metal selected from Groups Ib, IIa, IIb, VIa, VIIa, and VIII of the Periodic Table.
Claim 29
Dependent Claim
31 words
The agent of claim 17, wherein the metal chelate comprises at least one metal selected from the group consisting of Cu, Ag, Zn, Ca, Cr, Mn, Co, Ni, Pd and Fe.
Claim 30
Dependent Claim
38 words
The agent of claim 17, wherein the chelate is derived from at least one chelating agent selected from the group consisting of ethylenediaminetetraacetic acid, nitrilotriacetic acid, trans-1,2-cyclohexadiaminetetraacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid, glycoletherdiaminetetraacetic acid, iminodiacetic acid, and N,N-ethylenebis(γ-o-hydroxyphenyl)glycine.
Claim 31
Dependent Claim
20 words
The agent of claim 17, wherein the benzene adsorption rate constant of the fibrous activated carbon is at least 0.2/min.
Claim 32
Dependent Claim
21 words
The agent of claim 17, wherein the fiber strength of the fibrous activated carbon is at least 15 kg/mm 2 .
Claim 33
Dependent Claim
19 words
The agent of claim 17, wherein the diameter of the fibrous activated carbon is about 3μ to about 25μ.
Claim 34
Dependent Claim
38 words
The agent of claim 17, wherein the amount of the metal chelate compound supported is from 0.01% to 30% by weight, based on the total weight of the fibrous activated carbon and the metal chelate compound supported thereon.
Claim 35
Dependent Claim
19 words
The agent of claim 17, wherein the fibrous activated carbon is an activated carbon obtained from a polyacrylonitrile fiber.
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) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |