US4615993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for carrying out gas/solid reactions particularly the activation and re-activation of activated carbon
Assignee: Evonik Operations GmbH
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Filing: 1985-02-11
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Granted: 1986-10-07
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Expires: 2005-02-11
Abstract
Abstract Untreated coal is activated with steam at temperatures of 600° to 950° C. in a vibrating fluid bed, which is directly heated. The untreated coal is pre-dried by counter-current passage of the waste gases from the reaction either during feeding of the untreated coal or in the first part of the vibrating fluid bed trough. During the activation, secondary air can be passed in through a sparge pipe which is arranged parallel to the vibrating fluid bed trough. It is possible to carry out the heating exclusively with the supply of secondary air.
Inventors
- 👤 Rudiger Schirrmacher
- 👤 Gisbert Semmerau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:55
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/40; C; C01; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/336; C01B32/354; C01B32/36; C01B32/39; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
A method for carrying out gas/solid reactions for the activation and reactivation of activated carbon, comprising: conveying carbonaceous material to a first zone and directly contacting said carbonaceous material in said first zone with gas sufficient to subject said carbonaceous material to drying, thereafter conveying said carbonaceous material to a second zone which is a horiztonally vibrating fluidized bed maintained at a temperature of 600° to 950° C. by combustion gas which is at a temperature of 950° to 1200° C. and depositing said carbonaceous material onto said vibrating horizontal bed, directly contacting said carbonaceous material in said bed with an activating gas, said activating gas being introduced into said bed from beneath said bed, said activating gas comprising steam, at a temperature of 600° to 900° C., passing the activating gas up through said carbonaceous material to thereby fluidize said bed while said material is being vibrated in a horizontal manner to thereby approximate plug flow of said material, the composition of said combustion gas and said activating gas being different, there being cross flow of the fluidizing gases to ensure high water vapor partial pressure in the bed of carbonaceous material and rapid removal of inhibiting product gases.
Claim 2
Independent Claim
200 words
A method for carrying out gas/solid reactions for the activation and reactivation of activated carbon, comprising: conveying carbonaceous material to a first zone and directly contacting said carbonaceous material in said first zone with gas sufficient to subject said carbonaceous material to drying, thereafter conveying said carbonaceous material to a second zone which is a horiztonally vibrating fluidized bed maintained at a temperature of 600° to 950° C. by combustion gas which is at a temperature of 950° to 1200° C. and depositing said carbonaceous material onto said vibrating horizontal bed, directly contacting said carbonaceous material in said bed with an activating gas, said activating gas being introduced into said bed from beneath said bed, said activating gas comprising steam, at a temperature of 600° to 900° C., passing the activating gas up through said carbonaceous material to thereby fluidize said bed while said material is being vibrated in a horizontal manner to thereby approximate plug flow of said material, the composition of said combustion gas and said activating gas being different, there being cross flow of the fluidizing gases to ensure high water vapor partial pressure in the bed of carbonaceous material and rapid removal of inhibiting product gases.
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) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |