US4311680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removal of sulfur compounds from a gas stream
Assignee: Goodyear Tire and Rubber Co
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Filing: 1980-11-20
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Granted: 1982-01-19
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Expires: 2000-11-20
Abstract
Abstract This invention relates to a process for the removal of sulfur compounds from a gas stream. More specifically, this invention relates to an improvement in the iron oxide method of sulfur removal from a gas stream through the use of hydrogen peroxide.
Inventors
- 👤 Kenneth J. Frech
- 👤 James J. Tazuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:15
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; C; C07; C07C; C07C7/00; C07C7/148; C07C7/14833; C07C7/1485
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
A process for removing hydrogen sulfide, sulfides and mercaptans from a gas stream which comprises the steps in combination of: (a) contacting the gas stream with an oxide of a metal selected from the group consisting of iron, chromium, cobalt, lead, manganese, molybdenum, nickel, copper, vanadium, zinc, tungsten and antimony; (b) introducing an aqueous solution of hydrogen peroxide on the metal oxide while continuing to contact the gas stream with the metal oxide.
Claim 2
Dependent Claim
73 words
A process for removing hydrogen sulfide, sulfides and mercaptans from a gas stream which comprises the steps in combination of: (a) contacting the gas stream with an oxide of a metal selected from the group consisting of iron, chromium, cobalt, lead, manganese, molybdenum, nickel, copper, vanadium, zinc, tungsten and antimony; (b) introducing an aqueous solution of hydrogen peroxide on the metal oxide while continuing to contact the gas stream with the metal oxide.
Claim 3
Dependent Claim
30 words
A process according to claim 1 wherein the gas stream is natural gas and is subsequently treated until a desired level of H 2 S, mercaptans and sulfides is obtained.
Claim 4
Dependent Claim
21 words
A process according to claim 1 wherein the concentration of aqueous H 2 O 2 is at least 25% by weight.
Claim 5
Dependent Claim
40 words
A process according to claim 1 wherein an aqueous solution of a compound selected from the group NaOH, KOH, Na 2 CO 3 , CaCO 3 and Ca(OH) 2 is introduced upon the metal oxide deposited upon an inert carrier.
Claim 6
Dependent Claim
20 words
A process according to claim 1 wherein the form of the ferric oxide is either alpha or gamma or both.
Claim 7
Dependent Claim
55 words
A process for removing H 2 S, sulfides and mercaptans from a gas stream wherein said gas stream is contacted with ferric oxide deposited upon an inert carrier, the improvement comprising continuously or periodically introducing aqueous H 2 O 2 on the ferric oxide while continuing to contact the gas stream with said ferric oxide.
Claim 8
Dependent Claim
55 words
A process for removing H 2 S, sulfides and mercaptans from a gas stream wherein said gas stream is contacted with ferric oxide deposited upon an inert carrier, the improvement comprising continuously or periodically introducing aqueous H 2 O 2 on the ferric oxide while continuing to contact the gas stream with said ferric oxide.
Claim 9
Dependent Claim
30 words
A process according to claim 6 wherein the gas stream is natural gas and is subsequently treated until a desired level of H 2 S, mercaptans and sulfides is obtained.
Claim 10
Dependent Claim
21 words
A process according to claim 6 wherein the concentration of aqueous H 2 O 2 is at least 25% by weight.
Claim 11
Dependent Claim
40 words
A process according to claim 6 wherein an aqueous solution of a compound selected from the group NaOH, KOH, Na 2 CO 3 , CaCO 3 and Ca(OH) 2 is introduced upon the metal oxide deposited upon an inert carrier.
Claim 12
Dependent Claim
20 words
A process according to claim 6 wherein the form of the ferric oxide is either alpha or gamma or both.
Claim 13
Dependent Claim
22 words
A process according to claim 1 or 6 wherein the gas stream is natural gas and the metal oxide is ferric oxide.
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) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |