US4531953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sublimation of amine compounds on activated carbon pore surfaces
Assignee: Calgon Carbon Corp
•
Filing: 1983-06-21
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Granted: 1985-07-30
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Expires: 2003-06-21
Abstract
Abstract The instant invention is directed to an activated carbon impregnated with 0.1 to 10 percent, by weight, of an amine compound, which is solid and sublimes at 40 DEG C. or above, and having a moisture content after impregnation of 5.0 percent or less, by weight. The instant invention is also directed to a process for impregnating carbon comprising allowing an amine compound, which is solid and sublimes at the temperature at which said amine is applied, to sublime in the presence of an activated carbon. The instant invention is also directed to the use of the impregnated carbon in removing toxic gases from a gas stream comprising passing the gas stream through the impregnated carbon.
Inventors
- 👤 James E. Groose
- 👤 Paul K. T. Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:19
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01J; B01J20/00; B01J20/02; B01J20/20; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/901; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
52 words
An activated carbon impregnated with at least one metal and impregnated in the absence of added water with 0.1 to 10%, by weight, of an amine compound selected from the group consisting of triethylene diamine, quinuclidine, and mixtures thereof, and having a moisture content after impregnation of 5.0% or less, by weight.
Claim 2
Dependent Claim
52 words
An activated carbon impregnated with at least one metal and impregnated in the absence of added water with 0.1 to 10%, by weight, of an amine compound selected from the group consisting of triethylene diamine, quinuclidine, and mixtures thereof, and having a moisture content after impregnation of 5.0% or less, by weight.
Claim 3
Dependent Claim
23 words
The activated carbon of claim 1, wherein said metal impregnant is selected from the group consisting of copper, silver, chromium and mixtures thereof.
Claim 4
Dependent Claim
20 words
The activated carbon of claim 1, wherein said carbon has a moisture content of 3.0 percent or less, by weight.
Claim 5
Dependent Claim
46 words
A process for impregnating carbon comprising allowing an amine compound selected from the group consisting of triethylene diamine, quinuclidine, and mixtures thereof, to sublime in the absence of added water in the presence of an activated carbon which has been impregnated with at least one metal.
Claim 6
Dependent Claim
46 words
A process for impregnating carbon comprising allowing an amine compound selected from the group consisting of triethylene diamine, quinuclidine, and mixtures thereof, to sublime in the absence of added water in the presence of an activated carbon which has been impregnated with at least one metal.
Claim 7
Dependent Claim
13 words
The process of claim 4, wherein said sublimation is conducted in a container.
Claim 8
Dependent Claim
22 words
The process of claim 4, wherein said metal impregnant is selected from the group consisting of copper, silver, chromium and mixtures thereof.
Claim 9
Dependent Claim
9 words
The product produced by the process of claim 4.
Claim 10
Dependent Claim
72 words
A process for the removal of toxic gases from a gas stream comprising passing the gas stream through an activated carbon impregnated with at least one metal and impregnated in the absence of added water with 0.1 to 10 percent, by weight, of an amine compound, selected from the group consisting of triethylene diamine, quinuclidine, and mixtures thereof, and having a moisture content after impregnation of 5 percent or less, by weight.
Claim 11
Dependent Claim
72 words
A process for the removal of toxic gases from a gas stream comprising passing the gas stream through an activated carbon impregnated with at least one metal and impregnated in the absence of added water with 0.1 to 10 percent, by weight, of an amine compound, selected from the group consisting of triethylene diamine, quinuclidine, and mixtures thereof, and having a moisture content after impregnation of 5 percent or less, by weight.
Claim 12
Dependent Claim
19 words
The process of claim 8, wherein said carbon has a moisture content of less than 3.0 percent, by weight.
Claim 13
Dependent Claim
76 words
A process for the removal of toxic gases from a gas stream comprises passing the gas stream through an amine impregnated activated carbon which has been impregnated with at least one metal, which was prepared by allowing an amine compound, selected from the group consisting of triethylene diamine, quinuclidine, and mixtures thereof, to sublime in the absence of added water in the presence of an activated carbon which has been impregnated with at least one metal.
Claim 14
Dependent Claim
76 words
A process for the removal of toxic gases from a gas stream comprises passing the gas stream through an amine impregnated activated carbon which has been impregnated with at least one metal, which was prepared by allowing an amine compound, selected from the group consisting of triethylene diamine, quinuclidine, and mixtures thereof, to sublime in the absence of added water in the presence of an activated carbon which has been impregnated with at least one metal.
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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) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |