US3777010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
H2s removal
Assignee: Chevron USA Inc
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Filing: 1971-06-21
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Granted: 1973-12-04
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Expires: 1991-06-21
Abstract
Abstract A PROCESS FOR REMOVING H2S FROM A GAS MIXTURE CONTAINING H2S AND FOR THE PRODUCTION OF SULFUR WHICH PROCESS COMPRISES CONTACTING THE GAS MIXTURE WITH A SOLUTION, PREPARED BY MIXING 100 PARTS OF AN H2S SOLVENT WITH 0.05 TO 5.0 PARTS OF AN AMINE, TO ABSORB H2S FROM THE GAS MIXTURE, AND OXIDIZING H2S ABSORBED IN THE SOLUTION TO SULFUR BY CONTACTING THE SOLUTION CONTAINING H2S WITH A GAS COMPRISING MOLECULAR OXYGEN. PREFERABLY THE GAS MIXTURE FROM WHICH THE H2S IS REMOVED IS A MIXTURE OF H2S AND LIGHT HYDROCARBON GASES. PREFERRED AMINE ADDITITVES ARE ALKYL NITROGEN COMPOUNDS SUCH AS DIMETHYLAMINE. PREFERRED H2S SOLVENTS INCLUDE DIMETHYL FORMAMIDE.
Inventors
- 👤 S Nicksic
- 👤 S Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:12
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52; B01D53/523; C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/05
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |