US4526703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent for the dry removal of sulfur dioxide and like components of an exhaust gas
Assignee: RHEINISCH-WESTFALISCHES ELEKTRIZITATSWERK AKTIENGESELLSCHAFT A CORP OF WEST GERMANY
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Filing: 1983-08-26
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Granted: 1985-07-02
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Expires: 2003-08-26
Abstract
Abstract An absorbent for the dry removal of sulfur dioxide and other noxious and toxic components from a combustion flue gas which consists essentially of at least one finely divided alkaline-earth compound and an additive selected from the group which consists of at least one carboxylic acid or an alkali metal, alkaline-earth metal or ammonium salt thereof.
Inventors
- 👤 Georg R. U. Gebhard
- 👤 Klaus R. G. Hein
- 👤 Wolfgang Glaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:49
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/508
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
61 words
An absorbent for the dry removal of sulfur dioxide and other noxious and toxic components from a combustion flue gas which can be supplied to a combustion chamber in which a fossil fuel is burned to form said flue gas and which consists essentially of finely divided calcium hydroxide which is combined with 0.1 to 10 mole percent of acetic acid.
Claim 2
Dependent Claim
61 words
An absorbent for the dry removal of sulfur dioxide and other noxious and toxic components from a combustion flue gas which can be supplied to a combustion chamber in which a fossil fuel is burned to form said flue gas and which consists essentially of finely divided calcium hydroxide which is combined with 0.1 to 10 mole percent of acetic acid.
Claim 3
Dependent Claim
16 words
The absorbent defined in claim 1 which contains 0.1 to 5 mol % of acetic acid.
References Cited (Backward Citations)
GB189807172A
Cited
US3532637A
Cited
US3632306A
Cited
US4080428A
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US4222993A
Cited
US4233175A
Cited
US4262610A
Cited
US4191115A
Cited
US4337231A
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US4302207A
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US4388281A
Cited
US4423018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |