US4595575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the continuous purification of waste gases with activated carbon
Assignee: Rain Carbon Germany GmbH
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Filing: 1984-12-18
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Granted: 1986-06-17
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Expires: 2004-12-18
Abstract
Abstract The invention relates to a process for the continuous wet or wet-catalytic purification of waste gases by adsorption and chemisorption of the gaseous pollutants on activated carbons with simultaneous desorption of these pollutants or their reaction products. The process is carried out at 100 to 800 times gravity acceleration in a centrifugal filter, in the rotor of which a bed of fine-grain or fibrous activated carbon is arranged. The waste gas passes through this bed in codirectional or counter-current flow to the wash liquid. The pollutants are washed out with the desorbent flowing from the center outwardly.
Inventors
- 👤 Franz D. Oeste
- 👤 Joachim R. Kempfert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:11
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/06; B01J; B01J20/00; B01J20/02; B01J20/20; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/20; B01D2257/202; B01D2257/2025; B01D2257/204; B01D2257/2045; B01D2257/2047; B01D2257/206; B01D2257/2064; B01D2257/30; B01D2257/302; B01D2257/304; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40077; B01D2259/40079; B01D2259/40081; B01D2259/40083
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
80 words
A process for the continuous wet or wet-catalytic purification of waste gases by chemisorption adsorption of gaseous pollutants on activated carbon and desorption of these pollutants or their reaction products, characterized in that activated carbon is arranged in a rotor of a sieve-centrifugal filter and the waste gas passes through the activated carbon and issues via a perforated portion of a hollow shaft, while at the same time the desorbent flows through the activated carbon bed from the center outwardly.
Claim 2
Dependent Claim
80 words
A process for the continuous wet or wet-catalytic purification of waste gases by chemisorption adsorption of gaseous pollutants on activated carbon and desorption of these pollutants or their reaction products, characterized in that activated carbon is arranged in a rotor of a sieve-centrifugal filter and the waste gas passes through the activated carbon and issues via a perforated portion of a hollow shaft, while at the same time the desorbent flows through the activated carbon bed from the center outwardly.
Claim 3
Dependent Claim
31 words
Process according to claim 1, characterized in that for desorption a wash liquid is applied uniformly on the hollow shaft of the centrifugal filter perforated in the region of the rotor.
Claim 4
Dependent Claim
25 words
Process according to claim 2, characterized in that the wash liquid is applied by means of brushes sliding on the inside of the hollow shaft.
Claim 5
Dependent Claim
21 words
Process according to claim 1, characterized in that mats, felts and fabrics of activated carbon fibers are used as activated carbon.
Claim 6
Dependent Claim
24 words
Process according to claim 1, characterized in that granulated carbons having a mean diameter of less than 1 mm are used as activated carbon.
Claim 7
Dependent Claim
41 words
Process according to claim 1, characterized in that the rotor of the centrifugal filter rotates at a speed such that in the center of the activated carbon bed a centrifugal acceleration results which corresponds to 100 to 800 times gravity acceleration.
Claim 8
Dependent Claim
22 words
Process according to claim 1, characterized in that it is carried out in a temperature range of from 20° to 80° C.
Claim 9
Dependent Claim
19 words
Process according to claim 1, characterized in that the centrifuge is provided with baffles inside and/or outside the rotor.
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) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |