Patent US2310528A successfully refreshed from Google Patents.
Patent US2321639A successfully refreshed from Google Patents.
Patent US3711760A successfully refreshed from Google Patents.
Patent US2209214A successfully refreshed from Google Patents.
Patent US3914399A successfully refreshed from Google Patents.
US3914399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elemental sulfur produced by wet oxidation of hydrogen sulfide
Assignee: Marathon Oil Co
•
Filing: 1973-12-26
•
Granted: 1975-10-21
•
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
2026-11-03 03:10
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 |