US4824645A
Expired / Lapsed
US
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Process for selectively removing hydrogen sulfide from a gas stream at high pressure
Assignee: Mobil Oil AS
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Filing: 1984-05-25
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Granted: 1989-04-25
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Expires: 2004-05-25
Abstract
Abstract Hydrogen sulfide can be removed selectively from a gas stream also containing carbon dioxide at high pressure, such as those found at natural gas production wellheads, by contacting the gas stream with an alkaline liquid for a time period of less than about 80 milliseconds.
Inventors
- 👤 Timothy A. Jones
- 👤 Earl S. Snavely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:23
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52; B01D53/14; B01D53/1456; B01D53/1468; B01D53/1493; C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/05; Y; Y02; Y02C; Y02C20/00; Y02C20/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
A method for selectively removing hydrogen sulfide from a gas stream from a natural gas production well containing hydrogen sulfide and carbon dioxide, comprising contacting the gas stream with a stoichiometric excess of a polyvalent metal chelate solution over said hydrogen sulfide said solution having a pH of about 8.0 to 9.2 for a time period less than 80 milliseconds to absorb hydrogen sulfide and not carbon dioxide, by flowing said gas stream and said solution past from two to six mixing elements in a static mixer, said gas stream being at a wellhead pressure of about 760-880 psig during said contacting period.
Claim 2
Independent Claim
103 words
A method for selectively removing hydrogen sulfide from a gas stream from a natural gas production well containing hydrogen sulfide and carbon dioxide, comprising contacting the gas stream with a stoichiometric excess of a polyvalent metal chelate solution over said hydrogen sulfide said solution having a pH of about 8.0 to 9.2 for a time period less than 80 milliseconds to absorb hydrogen sulfide and not carbon dioxide, by flowing said gas stream and said solution past from two to six mixing elements in a static mixer, said gas stream being at a wellhead pressure of about 760-880 psig during said contacting period.
Claim 3
Dependent Claim
16 words
A method according to claim 1, wherein said polyvalent metal chelate solution is an iron-HEDTA solution.
Claim 4
Dependent Claim
18 words
A method according to claim 1, wherein the gas stream and the solution flow past six mixing elements.
References Cited (Backward Citations)
US2548498A
Cited
US2747962A
Cited
US4036942A
Cited
US3933993A
Cited
DE3000250A1
Cited
US4499059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |