US4499059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In-line injection of alkaline absorbant to remove H2 S
Assignee: Mobil Oil AS
•
Filing: 1983-11-16
•
Granted: 1985-02-12
•
Expires: 2003-11-16
Abstract
Abstract Hydrogen sulfide is removed from a gas stream by injecting an alkaline solution into the gas stream. The velocity of the gas stream is such that it has a Reynolds number of at least 50,000 and the Weber number for the injected alkaline solution is at least about 16. Alkali metal hydroxides and polyvalent metal chelates are useful alkaline solutions.
Inventors
- 👤 Timothy A. Jones
- 👤 Earl S. Snavely, Jr.
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; Y; Y10; Y10S; Y10S423/00; Y10S423/09
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
69 words
A method for removing hydrogen sulfide from a hydrogen sulfide-contaminated gas stream, comprising: supplying a hydrogen sulfide-containing gas to a pipe at a velocity so that said gas has a Reynolds number of at least 150,000; injecting an alkaline liquid into said pipe at a Weber number of at least about 16 to absorb hydrogen sulfide from said gas stream; and separating said injected liquid from said gas stream.
Claim 2
Independent Claim
69 words
A method for removing hydrogen sulfide from a hydrogen sulfide-contaminated gas stream, comprising: supplying a hydrogen sulfide-containing gas to a pipe at a velocity so that said gas has a Reynolds number of at least 150,000; injecting an alkaline liquid into said pipe at a Weber number of at least about 16 to absorb hydrogen sulfide from said gas stream; and separating said injected liquid from said gas stream.
Claim 3
Dependent Claim
29 words
The method of claim 1, wherein said alkaline solution is a solution of at least one of a polyvalent metal chelate, an alkanol amine or a hydroxide ion source.
Claim 4
Dependent Claim
15 words
The method of claim 2, wherein said alkaline solution is a polyvalent metal chelate solution.
Claim 5
Dependent Claim
19 words
The method of claim 3, wherein the concentration of said chelate solution is no more than about 0.1 molar.
Claim 6
Dependent Claim
15 words
The method of claim 2, wherein said alkaline solution is a solution of sodium hydroxide.
Claim 7
Dependent Claim
20 words
The method of claim 5, wherein the concentration of said sodium hydroxide solution is no more than about 2 molar.
Claim 8
Dependent Claim
40 words
The method of claim 1, wherein said gas stream also includes carbon dioxide, said method further comprising limiting the gas-liquid contact time between injection and separation to not more than 0.1 sec. to absorb hydrogen sulfide and not carbon dioxide.
Claim 9
Dependent Claim
16 words
The method of claim 1, wherein said injected solution forms droplets about 0.08 inch in diameter.
Claim 10
Dependent Claim
18 words
The method of claim 8, wherein said droplets are dispersed to a particle size of about 0.001 inch.
Claim 11
Dependent Claim
15 words
The method of claim 1, wherein the gas-to-liquid volume ratio is at least about 30.
Claim 12
Dependent Claim
16 words
The method of claim 4, wherein the gas-to-liquid volume ratio is no more than about 1000.
Claim 13
Dependent Claim
16 words
The method of claim 6, wherein the gas-to-liquid volume ratio is no more than about 10,000.
Claim 14
Dependent Claim
14 words
The method of claim 1, wherein the Reynolds number is at least about 300,000.
Claim 15
Dependent Claim
14 words
The method of claim 1, wherein the Weber number is about 16 to 140.
Claim 16
Dependent Claim
14 words
The method of claim 14, wherein the Weber number is about 50 to 140.
References Cited (Backward Citations)
US18958A
Cited
USRE18958E
Cited
US2161663A
Cited
US2083213A
Cited
US2747962A
Cited
US3286992A
Cited
US4085192A
Cited
US4009251A
Cited
US4325923A
Cited
US4293531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |