Patent US3409520A successfully refreshed from Google Patents.
US3409520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of hydrogen sulfide from a hydrogen sulfide-hydrocarbon gas mixture by electrolysis
Assignee: Mobil Oil AS
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Filing: 1965-09-23
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Granted: 1968-11-05
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Expires: 1985-09-23
Abstract
No abstract record available.
Inventors
- 👤 Perce W Bolmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:53
CPC Classifications
C; C25; C25B; C25B1/00; C01; C01B; C01B3/00; C01B17/00; C01B17/02; C01B17/04; C01B17/05; C01B17/22; C01B17/34; C01B3/02; C01B3/04; C10; C10G; C10G5/00; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/12; C10K1/122; C25B1/01; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN THE REMOVAL OF HYDROGEN SULFIDE FROM A HYDROGEN SULFIDE-HYDROCARBON GAS MIXTURE WITH THE FORMATION OF SULFUR PRODUCT AND FREE HYDROGEN BY ELECTROLYSIS IN AN ELECTROLYSIS CELL HAVING AN ELECTROLYTE THEREIN AND AN ANODE AND A CATHODE IN CONTACT WITH SAID ELECTROLYTE AND CONNECTED TO AN EXTERNAL SOURCE OF ELECTRIC POWER, THE METHOD OF: (A) INTRODUCING A HYDROGEN SULFIDE-HYDROCARBON GAS MIXTURE INTO SAID ELECTROLYSIS CELL AND INTO CONTACT WITH SAID ELECTROLYTE AND SAID ANODE; (B) PASSING AN EXTERNALLY GENERATED ELECTRIC CURRENT THROUGH SAID ELECTOLYTE BETWEEN SAID ANODE AND SAID CATHODE TO ELECTOLYTICALLY OXIDEIZE AT SAID ANODE SULFIDE IONS TO A SULFUR OXIDATION PRODUCT OF SAID SULFIDE IONS AND ELECTROLYTICALLY REDUCE AT SAID CATHODE HYDROGEN IONS TO FREE HYDROGEN; (C) SEPARATELY WITHDRAWING SAID HYDROCARBON GAS AND AT LEAST A PORTION OF SAID SULFUR PRODUCT FROM SAID ELECTROLYSIS CELL; AND (D) WITHDRAWING SAID HYDROGEN GAS FROM SAID ELECTROLYSIS CELL.
Claim 2
Dependent Claim
147 words
IN THE REMOVAL OF HYDROGEN SULFIDE FROM A HYDROGEN SULFIDE-HYDROCARBON GAS MIXTURE WITH THE FORMATION OF SULFUR PRODUCT AND FREE HYDROGEN BY ELECTROLYSIS IN AN ELECTROLYSIS CELL HAVING AN ELECTROLYTE THEREIN AND AN ANODE AND A CATHODE IN CONTACT WITH SAID ELECTROLYTE AND CONNECTED TO AN EXTERNAL SOURCE OF ELECTRIC POWER, THE METHOD OF: (A) INTRODUCING A HYDROGEN SULFIDE-HYDROCARBON GAS MIXTURE INTO SAID ELECTROLYSIS CELL AND INTO CONTACT WITH SAID ELECTROLYTE AND SAID ANODE; (B) PASSING AN EXTERNALLY GENERATED ELECTRIC CURRENT THROUGH SAID ELECTOLYTE BETWEEN SAID ANODE AND SAID CATHODE TO ELECTOLYTICALLY OXIDEIZE AT SAID ANODE SULFIDE IONS TO A SULFUR OXIDATION PRODUCT OF SAID SULFIDE IONS AND ELECTROLYTICALLY REDUCE AT SAID CATHODE HYDROGEN IONS TO FREE HYDROGEN; (C) SEPARATELY WITHDRAWING SAID HYDROCARBON GAS AND AT LEAST A PORTION OF SAID SULFUR PRODUCT FROM SAID ELECTROLYSIS CELL; AND (D) WITHDRAWING SAID HYDROGEN GAS FROM SAID ELECTROLYSIS CELL.
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |