US4235585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for neutralization of acidic combustion products and for boiler cleaning
Assignee: JESPERSEN SVEN ERIC FORDEBURG 29/11 2398 HARISLEE
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Filing: 1979-03-05
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Granted: 1980-11-25
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Expires: 1999-03-05
Abstract
Abstract In the combustion zone of a furnace burning sulphur-containing fuel, one introduces continuously sodium or potassium nitrate; ammonium nitrate; calcium hydroxide and/or magnesium carbonate; carbon; and ammonium carbonate. A neutralization of acidic sulphur compounds formed by the combustion is achieved, and the boiler is kept free from soot and other deposits.
Inventors
- 👤 Hans Christian M. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:14
CPC Classifications
A; A62; A62D; A62D3/00; A62D3/30; A62D3/36; C; C10; C10L; C10L1/00; C10L1/10; C10L1/12; C10L10/00; C10L10/02; A62D2101/00; A62D2101/40; A62D2101/47; C10L1/1208; C10L1/1233; C10L1/1266
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
56 words
A process for the total or partial neutralization of the acidic combustion products formed by combustion of sulphur-containing fuel by continuously injecting basic substances in the combustion zone, characterized by performing a continuous injection of following compounds: (a) sodium or potassium nitrate (b) ammonium nitrate (c) magnesium carbonate and/or calcium hydroxide (d) carbon (e) ammonium carbonate.
Claim 2
Dependent Claim
56 words
A process for the total or partial neutralization of the acidic combustion products formed by combustion of sulphur-containing fuel by continuously injecting basic substances in the combustion zone, characterized by performing a continuous injection of following compounds: (a) sodium or potassium nitrate (b) ammonium nitrate (c) magnesium carbonate and/or calcium hydroxide (d) carbon (e) ammonium carbonate.
Claim 3
Dependent Claim
57 words
A process as claimed in claim 1, characterized in that the compounds are injected in quantities which, calculated as percentage by weight of the total amount of the compounds (a)+(b)+(c)+(d)+(e), are as follows: (a) sodium or potassium nitrate: 20-55% (b) ammonium nitrate: 7-15% (c) magnesium carbonate and/or calcium hydroxide: 15-40% (d) carbon: 1-4% (e) ammonium carbonate: 15-40%.
Claim 4
Dependent Claim
28 words
A process as claimed in claim 1 or 2, characterized by using the compounds (a)-(e) in a total amount of 50-250 g per kg sulphur in the fuel.
Claim 5
Dependent Claim
41 words
A composition for use in the process according to claim 1, characterized in that it comprises a mixture of the following compounds: (a) sodium or potassium nitrate (b) ammonium nitrate (c) magnesium carbonate and/or calcium hydroxide (d) carbon (e) ammonium carbonate.
Claim 6
Dependent Claim
48 words
A composition as claimed in claim 4, characterized in that it contains the compounds (a)-(e) in the following amounts, calculated as percentage by weight: (a) sodium or potassium nitrate: 20-55% (b) ammonium nitrate: 7-15% (c) magnesium carbonate and/or calcium hydroxide: 15-40% (d) carbon: 1-4% (e) ammonium carbonate: 15-40%.
Claim 7
Dependent Claim
17 words
A composition as claimed in claim 4 or 5, characterized in that component (c) is calcium hydroxide.
Claim 8
Dependent Claim
17 words
A composition as claimed in claim 4 or 5, characterized in that component (c) is magnesium carbonate.
References Cited (Backward Citations)
US2800172A
Cited
FR2061935A5
Cited
GB1434836A
Cited
DE2322668A1
Cited
DE2326976A1
Cited
DE2500683A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |