US3615231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ocess utilizing the sensible heat of smelter gases to recover sulfur therefrom
Assignee: Individual
•
Filing: 1969-06-18
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Granted: 1971-10-26
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Expires: 1989-06-18
Abstract
Abstract The sensible heat of sulfur dioxide-containing flue gas is utilized to generate steam and to preheat methane or an equivalent hydrocarbon, the steam and hot methane being catalytically reformed to produce hydrogen. The hydrogen thus produced is employed to reduce the sulfur dioxide content of the flue gas to hydrogen sulfide, the hydrogen sulfide being reacted with a further quantity of sulfur dioxide to produce elemental sulfur which is recovered.
Inventors
- 👤 John T Cullom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:54
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0473; C01B17/0478; C01B17/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
41 words
The process according to claim 1 in which the catalytic reformation of steam and hydrocarbon gas is carried out at a higher temperature than the temperature at which said steam is generated and at which said hydrocarbon gas is initially heated.
Claim 2
Dependent Claim
26 words
The process according to claim 1 in which the hydrocarbon gas comprises essentially one or more saturated aliphatic compounds containing from one to eight carbon atoms.
Claim 3
Dependent Claim
32 words
The process according to claim 1 in which the catalytic reformation reaction is carried out at a temperature of about 1, 200 to 1,700* F. in the presence of a nickel catalyst.
Claim 4
Dependent Claim
35 words
The process according to claim 1 in which the sensible heat of flue gas at an initial temperature of about 1,100 to 1,400* F. is utilized to generate steam and to preheat the hydrocarbon gas.
Claim 5
Dependent Claim
45 words
The process according to claim 1 in which the sulfur dioxide content of the flue gas is reacted with hydrogen at a temperature of about 600 to 700* F. in the presence of a iron sulfide or a cobalt molybdate catalyst to produce hydrogen sulfide.
Claim 6
Dependent Claim
35 words
The process according to claim 1 in which the sulfur dioxide content is reacted with sulfur dioxide at a temperature of about 400* F. in the presence of an alumina catalyst to produce elemental sulfur.
Claim 7
Dependent Claim
79 words
The process according to claim 1 in which the hot reformer gas is brought into heat exchange relationship with water to generate steam, in which said steam and the carbon monoxide content of said reformer gas are reacted in the presence of a catalyst to produce a shift converter gas containing hydrogen and carbon dioxide, and in which said carbon dioxide is removed from said shift converter gas to produce hydrogen essentially free of carbon monoxide and carbon dioxide.
References Cited (Backward Citations)
US1799452A
Cited
US1917685A
Cited
US1959151A
Cited
US2425754A
Cited
US3515514A
Cited
US3476513A
Cited
US3495941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |