US3710737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing heat
Assignee: Boeing North American Inc
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Filing: 1970-10-01
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Granted: 1973-01-16
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Expires: 1990-10-01
Abstract
Abstract Heat is generated for external use by reacting a molten sulfide with a reactive form of oxygen such as air. The sulfate produced by this reaction is reduced to the sulfide form by contact with a carbonaceous material. A variety of carbonaceous materials may be used including common fuels and carbon-containing waste materials. Thus, the process can be used as a method of waste disposal as well as a method of generating heat.
Inventors
- 👤 J Birk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:59
CPC Classifications
B; B01; B01J; B01J10/00; B01J10/005; C; C01; C01B; C01B17/00; C01B17/22; C07; C07C; C07C4/00; C07C4/02; C09; C09K; C09K5/00; C09K5/16; C10; C10B; C10B49/00; C10B49/14; C10B53/00; C10G; C10G9/00; C10G9/40; C10J; C10J3/00; C10J3/57; C10J3/72; C10J3/86; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/0916; C10J2300/092; C10J2300/093; C10J2300/0946; C10J2300/0953; C10J2300/0956; C10J2300/0983; C10J2300/0996; C10J2300/18; C10J2300/1807
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
28 words
The method of claim 1 wherein said carbonaceous material is selected from the group consisting of natural gas, coke, coal, fuel oil, petroleum residue, lignite, peat and wood.
Claim 2
Dependent Claim
14 words
The method of claim 1 wherein said carbonaceous material is a carbonaceous waste material.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein said melt has a sulfur content of frOm about 1 to about 25 weight percent.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein said melt has a sulfur content of from about 2 to about 10 weight percent.
Claim 5
Dependent Claim
11 words
The method of claim 1 wherein said melt contains carbonate ions.
Claim 6
Dependent Claim
23 words
The method of claim 1 wherein a portion of said melt is continuously treated to prevent a build-up in sulfur and ash content.
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein said melt contains from about 0.5 to about 7 weight percent iron.
Claim 8
Independent Claim
128 words
A method for generating heat and consuming carbonaceous materials comprising simultaneously contacting a melt containing alkali metal ions and sulfide ions (S ) with a preselected amount of a reactive form of oxygen and with a sufficient amount of carbonaceous material such that the oxygen reacts with the sulfide according to the reaction: S + 2O2 -> SO4 and the carbonaceous material is predominately consumed in the reaction: SO4 + 2C -> S + 2CO2, and controlling said preselected amount of oxygen at less than that stoichiometrically required for oxidation of the carbonaceous material, which is present in excess in the melt, so that under steady-state operating conditions the sulfur present in the melt is maintained substantially all in sulfide form and substantially free of the sulfate form.
Claim 9
Dependent Claim
28 words
The method of claim 9 wherein said carbonaceous material is selected from the group consisting of natural gas, coke, coal, fuel oil, petroleum residues, lignite, peat and wood.
Claim 10
Dependent Claim
13 words
The method of claim 9 wherein said carbonaceous material is a waste material.
Claim 11
Dependent Claim
21 words
The method of claim 9 wherein said melt has a sulfur content of from about 1 to about 25 weight percent.
Claim 12
Dependent Claim
11 words
The method of claim 9 wherein said melt contains carbonate ions.
Claim 13
Independent Claim
82 words
A method of producing heat and consuming carbonaceous materials comprising contacting a melt containing alkali metal ions and sulfide ions with a reactive form of oxygen at a temperature of at least 300*C with a reactive form of oxygen to convert said sulfide to sulfate, contacting said sulfate with a carbonaceous material to convert said sulfate to sulfide and to produce a by-product gas selected from the group consisting of hydrocarbons, tars, oils, partially oxygenated organic compounds, carbon monoxide and mixtures thereof.
Claim 14
Dependent Claim
16 words
The method of claim 14 wherein said by-product gas is combusted with air above said melt.
Claim 15
Dependent Claim
17 words
The method of claim 14 wherein a portion of said by-product gas is recycled through said melt.
Claim 16
Dependent Claim
18 words
The method of claim 14 wherein said melt contains from about 1 to about 25 weight percent sulfur.
Claim 17
Dependent Claim
11 words
The method of claim 17 wherein said melt contains carbonate ions.
References Cited (Backward Citations)
US3527178A
Cited
US3642583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |