Patent US3773472A successfully refreshed from Google Patents.
US3773472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing sulphur oxides from industrial waste gas
Assignee: Gottfried Bischoff Bau Kompl Gasreinigungs und Wasserrueckkehlanlagen GmbH and Co KG
•
Filing: 1972-02-23
•
Granted: 1973-11-20
•
Expires: 1992-02-23
Abstract
Abstract An industrial waste gas containing sulphur oxides is admixed with an alkaline powder (or contains finely-divided particles of solids from the furnace) and is saturated with a wash liquid consisting primarily of water admixed with an alkali or alkaline salt. Then the saturated gas is adiabatically and continuously expanded to precipitate the wash liquid around the powder particles. The precipitated droplets are collected from the cleansed gas and, if desired, recirculated as wash liquid after sedimentation of solids. The gas and wash liquid are passed through a venturi clearance around a body above which a coldwater spray is provided.
Inventors
- 👤 G Hausberg
- 👤 G Kruger
- 👤 K Bentgraf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:19
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/10; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
41 words
The apparutus defined in claim 1, further comprising drain means for collecting wash liquid in said tower not entrained in a vapor state, said collecting means including a settling tank for separating particles stripped from said gas by said wash liquid.
References Cited (Backward Citations)
GB337436A
Cited
US2142406A
Cited
US2740693A
Cited
US3199267A
Cited
US3439724A
Cited
US3421315A
Cited
US3533748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |