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US3788043A
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US
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Absorber for sulfur trioxide
Assignee: GEA Group AG
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Filing: 1971-10-12
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Granted: 1974-01-29
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Expires: 1991-10-12
Abstract
Abstract In a contact process for transforming sulfur dioxide to sulfur trioxide, between the contact stages there is provided an interstage absorber for removing sulfur trioxide for the gases emerging from a previous stage. The gases are passed by a venturi system in intimate contact with sulfuric acid into a settling chamber in which sulfuric acid is collected in the sump and then, by another gas/liquid contactor or reagitator, into a further settling chamber with an outlet at its upper end.
Inventors
- 👤 K Dorr
- 👤 H Grimm
- 👤 R Kola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:41
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/18; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/765; C01B17/7655; C01B17/80; C01B17/806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
The interstage absorber defined in claim 1, further comprising means for introducing sulfuric acid into the gas traversing said passage.
Claim 2
Dependent Claim
31 words
The interstage absorber defined in claim 1 wherein said passage opens tangentially into said settling chamber, said settling chamber being cylindrical and its gas outlet disposed centrally at its upper end.
References Cited (Backward Citations)
US2604185A
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US3427006A
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US3409409A
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US3456928A
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US3631656A
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US3593497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |