US3913253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of removing sulfur oxide from exhaust gases
Assignee: Bergwerksverband GmbH
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Filing: 1970-10-16
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Granted: 1975-10-21
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Expires: 1990-10-16
Abstract
Abstract Sulfur oxides are removed from exhaust gases by passage through a moving bed of granular, carbon-containing adsorbent. The bed of adsorbent moves downward through a perforated shaft. The direction of flow of the exhaust gas is transverse to that of the adsorbent. The flow of the gas is adjusted so that more gas passes through the upper portion of the bed than through the lower portion.
Inventors
- 👤 Harald Juntgen
- 👤 Karl Knoblauch
- 👤 Gunther Gappa
- 👤 Jurgen Schwarte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:56
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/12; B01D; B01D53/00; B01D53/02; B01D53/06; B01D53/08; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/775; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/30; B01D2257/302; B01D2258/00; B01D2258/02; B01D2258/0283; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40077; B01D2259/40081; B01D2259/40083; B01D2259/40086
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
PROCESS OF TREATING EXHAUST GASES CONTAINING WATER VAPOR, OXYGEN AND SULFUR OXIDE COMPRISING THE STEPS OF MOVING A STREAM OF GRAULAR CARBON-CONTAINING ADSORBENT THROUGH AN ELONGATED ADSORPTION ZONE HAVING AN ADSORBENT INLET END AND AN ADSORBENT OUTLET END AND MOVING SAID EXHAUST GASES TRANSVERSELY THROUGH SAID STREAM OF GRANULAR CARBON-CONTAINING ADSORBENT MATERIAL IN SAID ADSORPTION ZONE IN SUCH A MANNER THAT IN THE REGION OF SAID ADSORPTION ZONE NEARER TO SAID ADSORBENT INLET EACH VOLUME UNIT OF SAID ADSORBENT STREAM IS TRAVERSED BY A GREATER AMOUNT OF EXHAUST GAES PER UNIT OF TIME THAN IN THE REGION OF SAID ADSORBENT ZONE NEARER TO SAID ADSORBENT OUTLET.
Claim 2
Dependent Claim
106 words
PROCESS OF TREATING EXHAUST GASES CONTAINING WATER VAPOR, OXYGEN AND SULFUR OXIDE COMPRISING THE STEPS OF MOVING A STREAM OF GRAULAR CARBON-CONTAINING ADSORBENT THROUGH AN ELONGATED ADSORPTION ZONE HAVING AN ADSORBENT INLET END AND AN ADSORBENT OUTLET END AND MOVING SAID EXHAUST GASES TRANSVERSELY THROUGH SAID STREAM OF GRANULAR CARBON-CONTAINING ADSORBENT MATERIAL IN SAID ADSORPTION ZONE IN SUCH A MANNER THAT IN THE REGION OF SAID ADSORPTION ZONE NEARER TO SAID ADSORBENT INLET EACH VOLUME UNIT OF SAID ADSORBENT STREAM IS TRAVERSED BY A GREATER AMOUNT OF EXHAUST GAES PER UNIT OF TIME THAN IN THE REGION OF SAID ADSORBENT ZONE NEARER TO SAID ADSORBENT OUTLET.
Claim 3
Dependent Claim
63 words
Process as defined in claim 1, wherein the amount of granular carbon-containing adsorbent being moved through said elongated adsorption zone remains constant per time unit and wherein said exhaust gases are moved transversely through said stream of granular carbon-containing adsorbent material in said adsorption zone in an amount decreasing with the increase of the distance from said inlet of said elongated adsorption zone.
Claim 4
Dependent Claim
13 words
Process as defined in claim 1 whereiN said adsorbent bed is moved downwardly.
Claim 5
Dependent Claim
33 words
Process as defined in claim 1 wherein said exhaust gases contain sulfur dioxide and said sulfur dioxide is adsorbed by said adsorbent and reacts with said water vapor and oxygen forming sulfuric acid.
Claim 6
Dependent Claim
54 words
Process as defined in claim 1 wherein said adsorption zone has a gas inlet face and a gas outlet face and said adsorbent in the region nearer to said inlet face is in an axial direction through said adsorption zone moved more rapidly than in said adsorbent in the region of said outlet face.
Claim 7
Dependent Claim
14 words
Process as defined in claim 1 wherein said adsorption zone is rectangular in cross-section.
Claim 8
Dependent Claim
28 words
Process as defined in claim 1 wherein a portion of said gases leaving said adsorption zone is mixed with as-yet untreated gases and recycled to said adsorption zone.
Claim 9
Dependent Claim
16 words
Process as defined in claim 7 wherein the portion of said gases recycled is about 75%.
Claim 10
Dependent Claim
62 words
Process as defined in claim 7 wherein said exhaust gases contain sulfur dioxide which is adsorbed by said adsorbent and reacts with water and oxygen to form sulfuric acid and wherein the rates of gas and adsorbent flows are such as to raise the sulfuric acid loading on the adsorbent, immediately before regeneration of the latter, to up to 6% by weight.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |