US3914399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elemental sulfur produced by wet oxidation of hydrogen sulfide
Assignee: Marathon Oil Co
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Filing: 1973-12-26
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Granted: 1975-10-21
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Expires: 1993-12-26
Abstract
Abstract H2S and air are bubbled through a mixture of alcohol, e.g., methanol/amine e.g., isopropylamine/oxygen-carrier catechol to produce elemental sulfur which can settle to the bottom of the liquid phase.
Inventors
- 👤 Phillip M Beazley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:52
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/05; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
55 words
A PROCESS FOR CONVERTING HYDROGEN SULFIDE TO ELEMENTAL SULFUR COMPRISING FORMING A MIXTURE OF CONSISTING ESSENTIALLY OF ALCOHOL, ALIPHATIC AMINE, AND CATECHOL CONTACTING SAID MIXTURE WITH H2S AND WITH OXYGEN-CONTAINING GAS AND RECOVERING THE MONOCLINIC ELEMENTAL SULFUR THUS FORMED WHEREIN FROM ABOUT 1 TO ABOUT 100 MOLES OF AMINE ARE PRESENT PER MOLE OF CATECHOL.
Claim 2
Dependent Claim
55 words
A PROCESS FOR CONVERTING HYDROGEN SULFIDE TO ELEMENTAL SULFUR COMPRISING FORMING A MIXTURE OF CONSISTING ESSENTIALLY OF ALCOHOL, ALIPHATIC AMINE, AND CATECHOL CONTACTING SAID MIXTURE WITH H2S AND WITH OXYGEN-CONTAINING GAS AND RECOVERING THE MONOCLINIC ELEMENTAL SULFUR THUS FORMED WHEREIN FROM ABOUT 1 TO ABOUT 100 MOLES OF AMINE ARE PRESENT PER MOLE OF CATECHOL.
Claim 3
Dependent Claim
21 words
A process according to claim 1 wherein said alcohol is an alkanol having from about 1 to about 3 carbon atoms.
Claim 4
Dependent Claim
28 words
A process according to claim 1 wherein said aliphatic amine is selected from the group consisting of aliphatic amines having from about 1 to about 30 carbon atoms.
Claim 5
Dependent Claim
27 words
A process according to claim 1 wherein there are present either more or the same number of moles of said aliphatic amine than moles of said oxygen-carrier.
Claim 6
Dependent Claim
26 words
A process according to claim 1 wherein the moles of oxygen in the oxygen-containing gas per mole of hydrogen sulfide is preferably from 0.8 to 1.2.
Claim 7
Dependent Claim
36 words
A process according to claim 1 wherein the hydrogen sulfide is added at a rate of preferably from 0.1 to about 1 liter of hydrogen sulfide per liter of oxygen carrier and alcohol solution per minute.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |