US3862295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for sorptive removal of sulfur gases
Assignee: Westvaco Corp
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Filing: 1972-06-30
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Granted: 1975-01-21
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Expires: 1992-06-30
Abstract
Abstract There is disclosed an improved process of sorbing noxious sulfur-containing gases onto activated carbon by increasing the moisture content of the gas being treated by injecting water either prior to or concurrent with the sorption reaction which substantially increases the rate of sorption and permits more accurate temperature control of the process. A bed of fluidized carbon moving substantially countercurrent to the gas being treated is one system found to be especially efficient and effective.
Inventors
- 👤 Edward D Tolles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:13
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/06; B01D53/10; B01D53/12; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/508; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/775
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
14 words
The process according to claim 1 wherein said sorbent is granular activated carbon particles.
Claim 2
Dependent Claim
36 words
The process according to claim 1 wherein further comprising, passing said flue gas prior to the addition of water through a portion of the activated carbonaceous sorbent at a temperature above the sulfur trioxide dew point.
Claim 3
Dependent Claim
19 words
The process according to claim 1 wherein said flue gas is at a temperature between about 175*F. and 350*F.
Claim 4
Dependent Claim
28 words
The process according to claim 2 wherein said granular activated carbon particles are continuously moved in a substantially countercurrent direction to the travel path of said flue gas.
Claim 5
Dependent Claim
14 words
The process according to claim 1 wherein said water is added as a vapor.
Claim 6
Dependent Claim
14 words
The process according to claim 1 wherein said water is added as a liquid.
Claim 7
Dependent Claim
23 words
The process according to claim 1 wherein said water is added to said flue gas prior to contact with said activated carbonaceous sorbent.
Claim 8
Dependent Claim
27 words
The process according to claim 1 wherein said water is added to said flue gas while said flue gas is in contact with said activated carbonaceous sorbent.
References Cited (Backward Citations)
US3318662A
Cited
US3578390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |