US3780499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for the liquid-phase removal of a component from the gas stream especially the absorption of sulfur trioxide in sulfuric acid
Assignee: GEA Group AG
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Filing: 1971-10-12
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Granted: 1973-12-25
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Expires: 1991-10-12
Abstract
Abstract A process for the removal of gaseous components from a gas stream by liquid-phase absorption of the component in the treatment of the gas with a liquid, especially the absorption of sulfur trioxide from a gas stream obtained by the contactcatalysis oxidation of sulfur dioxide in the production of sulfuric acid, makes use of a uniflow vertical venturi absorber followed by a turbulencing device or horizontal venturi absorber and a counterflow column absorber or tower. The absorbing liquid is sulfuric acid.
Inventors
- 👤 K Dorr
- 👤 H Grimm
- 👤 R Kola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:44
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26; B01D53/263; B01D53/14; B01D53/1406; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/80; C01B17/806; C01B17/90
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
41 words
The process defined in claim 1 wherein said liquid and gas phases are passed through said absorbers at a rate and under conditions such that 90 to 98 percent of said component is removed from said gas phase in step (a).
Claim 2
Dependent Claim
24 words
The process defined in claim 1 further comprising the step of injecting a further portion of said liquid phase into said horizontal venturi absorber.
Claim 3
Dependent Claim
34 words
The process defined in claim 3 wherein said liquid phase is injected into at least one of said venturi absorbers at a pressure between 8 and 20 meters of head of the liuqid phase.
Claim 4
Dependent Claim
45 words
The process defined in claim 1 wherein said column contains a packing layer, the liquid phase in step (c) being applied to said packing layer from the top and trickling downwardly therethrough and said gas phase in step (b) passing upwardly through said packing layer.
Claim 5
Dependent Claim
18 words
The process defined in claim 5 wherein said packing layer has a height between 0.8 and 2.5 meters.
Claim 6
Dependent Claim
49 words
The process defined in claim 5 wherein said gas phase contains sulfur trioxide, the concentration of said acid and rate of supply thereof in step (a) being dimensioned to maintain the temperature of said gas phase upon discharge from said venturi absorber of step (a) at 100* to 180*.
Claim 7
Dependent Claim
24 words
The process defined in claim 7 wherein the sulfuric acid supplied in step (a) has a concentration of 94 to 98 percent by weight.
Claim 8
Dependent Claim
23 words
The process defined in claim 8 wherein the concentration of sulfuric acid supplied in step (b) is 98.5 to 98.1 percent by weight.
Claim 9
Dependent Claim
34 words
The process defined in claim 9 wherein the sulfuric acid in step (b) is trickled through said layer at a rate of 3 to 10 m3/h/m2 of the free cross-sectional area of said column.
Claim 10
Dependent Claim
24 words
The process defined in claim 10 wherein said gas phase is passed upwardly through said layer at a rate of 1.8 to 3.5 m/sec.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |