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US3933608A
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Method for the decomposition of hydrogen sulfide
Assignee: United States Department of the Interior
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Filing: 1974-08-27
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Granted: 1976-01-20
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Expires: 1994-08-27
Abstract
Abstract Hydrogen sulfide is decomposed to elemental sulfur in an electrical discharge. In one embodiment of the invention the H 2 S decomposition rate is substantially increased when the decomposition is effected in the presence of polymeric chlorotrifluoroethylene.
Inventors
- 👤 Larry A. Haas
- 👤 Sanaa E. Khalafalla
- 👤 Carl F. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:03
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0495; C01B3/00; C01B3/02; C01B3/04; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
47 words
A method for the decomposition of hydrogen sulfide into elemental sulfur and hydrogen which comprises exposing a gas comprising H 2 S to a silent electrical discharge derived from a voltage sufficient to effect said decomposition said decomposition being effected in the presence of polychlorotrifluoroethylene oil vapor.
Claim 2
Independent Claim
47 words
A method for the decomposition of hydrogen sulfide into elemental sulfur and hydrogen which comprises exposing a gas comprising H 2 S to a silent electrical discharge derived from a voltage sufficient to effect said decomposition said decomposition being effected in the presence of polychlorotrifluoroethylene oil vapor.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein the said exposure is at a temperature of -41°C to 30°C.
Claim 4
Dependent Claim
11 words
The method of claim 2 wherein the temperature is ambient temperature.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein said gas comprises H 2 S and an inert gas diluent.
Claim 6
Dependent Claim
16 words
The method of claim 4 wherein the gas diluent is selected from argon, nitrogen and helium.
Claim 7
Dependent Claim
23 words
The method of claim 4 wherein the concentration of H 2 S in said gas diluent is about .25 to 10% by volume.
Claim 8
Independent Claim
68 words
The method for the decomposition of hydrogen sulfide into hydrogen and elemental sulfur wherein a gas comprising hydrogen sulfide, polychlotrifluoroethylene oil vapor and an inert gas is exposed at a temperature of about -40°C to 61°C to a silent electrical discharge derived from a voltage sufficient to effect said decomposition, the concentration of said hydrogen sulfide in said inert gas ranging from about .25 to 10% by volume.
Claim 9
Independent Claim
68 words
The method for the decomposition of hydrogen sulfide into hydrogen and elemental sulfur wherein a gas comprising hydrogen sulfide, polychlotrifluoroethylene oil vapor and an inert gas is exposed at a temperature of about -40°C to 61°C to a silent electrical discharge derived from a voltage sufficient to effect said decomposition, the concentration of said hydrogen sulfide in said inert gas ranging from about .25 to 10% by volume.
Claim 10
Dependent Claim
17 words
The method of claim 7 wherein said temperature is ambient temperature and the pressure is atmospheric pressure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |