US2557643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of hydrosulfides to neutral sulfur compounds
Assignee: Shell Development Co
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Filing: 1947-10-28
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Granted: 1951-06-19
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Expires: 1967-10-28
Abstract
No abstract record available.
Inventors
- 👤 Lloyd C Fetterly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:21
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROCESS FOR OXIDIZING THE SULFIDE-SULFURCONTENT OF A HYDROGEN SULFIDE-CONTAINING GAS TO FREE SULFUR, COMPRISING CONTACTING SAID GAS WITH AN AQUEOUS SOLUTION HAVING A PH NOT GREATER THAN 7 AND CONTAINING AS SUBSTANTIALLY THE ONLY OXIDIZING AGENT FOR SAID HYDROGEN SULFIDE AN INDIGO COMPOUND HAVING AN AROMATIC RING WHICH IS SUBSTITUTED WITH A POLAR WATER-SOLUBILIZING RADICAL AND WHICH IS IN AN OXIDIZED STATE AND IN SUCH PROPORTION AND IN AN AMOUNT SUFFICIENT TO OXIDIZE SUBSTANTIALLY ALL OF THE SULFIDE-SULFURCONTENT, SEPARATING THE THUS TREATED GAS FROM THE RESULTING AQUEOUS SOLUTION AND FREE SULFUR. REGENERATING THE SEPARATED AQUEOUS SOLUTION BY TREATING WITH AN OXIDIZING AGENT TO CONVERT THE INDIGO COMPOUND TO THE ORIGINAL OXIDIZED STATE, SEPARATING THE AQUEOUS SOLUTION FROM THE FREE SULFUR, AND UTILIZING THE REGENERATED AQUEOUS SOLUTION TO CONTACT A FURTHER PORTION OF A HYDROGEN-SULFIDE CONTAINING GAS.
Claim 2
Dependent Claim
137 words
A PROCESS FOR OXIDIZING THE SULFIDE-SULFURCONTENT OF A HYDROGEN SULFIDE-CONTAINING GAS TO FREE SULFUR, COMPRISING CONTACTING SAID GAS WITH AN AQUEOUS SOLUTION HAVING A PH NOT GREATER THAN 7 AND CONTAINING AS SUBSTANTIALLY THE ONLY OXIDIZING AGENT FOR SAID HYDROGEN SULFIDE AN INDIGO COMPOUND HAVING AN AROMATIC RING WHICH IS SUBSTITUTED WITH A POLAR WATER-SOLUBILIZING RADICAL AND WHICH IS IN AN OXIDIZED STATE AND IN SUCH PROPORTION AND IN AN AMOUNT SUFFICIENT TO OXIDIZE SUBSTANTIALLY ALL OF THE SULFIDE-SULFURCONTENT, SEPARATING THE THUS TREATED GAS FROM THE RESULTING AQUEOUS SOLUTION AND FREE SULFUR. REGENERATING THE SEPARATED AQUEOUS SOLUTION BY TREATING WITH AN OXIDIZING AGENT TO CONVERT THE INDIGO COMPOUND TO THE ORIGINAL OXIDIZED STATE, SEPARATING THE AQUEOUS SOLUTION FROM THE FREE SULFUR, AND UTILIZING THE REGENERATED AQUEOUS SOLUTION TO CONTACT A FURTHER PORTION OF A HYDROGEN-SULFIDE CONTAINING GAS.
References Cited (Backward Citations)
US2432301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |