Patent US4824645A successfully refreshed from Google Patents.
US4824645A
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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 20:44
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)
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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) | 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 |