EP0086919A1
Expired / Lapsed
EP
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Process for the selective removal of hydrogen sulfide from gaseous stream
Assignee: Mobil Oil AS
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Filing: 1982-12-22
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Granted: —
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Expires: 2002-12-22
Abstract
Abstract In a process for the selective removal of hydrogen sulfide from a gaseous stream additionally containing carbon dioxide, the gaseous stream is contacted with a polyvalent metal chelate solution for a time sufficient to allow the polyvalent metal chelate to oxidize the hydrogen sulfide to elemental sulfur without allowing the polyvalent metal chelate solution to absorb appreciable amounts of carbon dioxide. The pH of the metal chelate solution should be greater than 7 and the contact time between the polyvalent metal chelate and the gaseous stream is between 0.006 and 0.08 second.
Inventors
- 👤 Earl Samuel Snavely, Jr.
- 👤 Timothy Alan Jones
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 21:03
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52; C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/05
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
60 words
A process for the selective removal of hydrogen sulfide from a gaseous stream additionally containing carbon dioxide by contacting the gaseous stream with a polyvalent metal chelate solution for a time sufficient to allow the polyvalent metal chelate to oxidize the hydrogen sulfide to elemental sulfur without allowing the polyvalent metal chelate solution to absorb appreciable amounts of carbon dioxide.
Claim 2
Dependent Claim
60 words
A process for the selective removal of hydrogen sulfide from a gaseous stream additionally containing carbon dioxide by contacting the gaseous stream with a polyvalent metal chelate solution for a time sufficient to allow the polyvalent metal chelate to oxidize the hydrogen sulfide to elemental sulfur without allowing the polyvalent metal chelate solution to absorb appreciable amounts of carbon dioxide.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein the polyvalent metal is iron.
Claim 4
Dependent Claim
14 words
The process of claim 1 or claim 2 wherein the chelate is ethylenediaminetetraacetic acid.
Claim 5
Dependent Claim
14 words
The process of claim 1 or claim 2 wherein the chelate is N-hydroxylethyl-ethylenediaminetriacetic acid.
Claim 6
Dependent Claim
30 words
The process of any one of claims 1 to 4 wherein the contact time between the gaseous stream and the metal chelate is from about 0.006 to about 0.08 second.
Claim 7
Dependent Claim
23 words
The process of any one of claims 1 to 5 wherein the polyvalent metal chelate solution has a pH between 7 and 11.
Claim 8
Dependent Claim
30 words
The process of any one of claims 1 to 6 wherein after oxidizing the hydrogen sulfide, the polyvalent metal chelate is regenerated by passing an oxygen-containing gas through said solution.
Claim 9
Dependent Claim
29 words
The process of claim 7 wherein said oxygen-containing gas is bubbled through said solution, and said sulfur particles are carried to the surface of the solution by said bubbles.
Claim 10
Dependent Claim
45 words
The process of claim 7 or claim 8 wherein said oxygen-containing gas is passed through said solution by forming a low pressure area below the surface of said solution and inducing said gas into said low pressure area to disperse said gas in said solution.
Claim 11
Dependent Claim
28 words
The process of claim 8 further comprising separating the sulfur particles from said solution and melting the sulfur particles and separating said molten sulfur from any residual solution.
Claim 12
Dependent Claim
29 words
The process of any one of claims 7 to 9 further comprising adding an oxidizing adjunct to said solution to increase the efficiency of regenerating the polyvalent metal chelate.
Claim 13
Dependent Claim
24 words
The process of claim 11 wherein said adjunct comprises an oxidizing agent selected from the group consisting of hydroquinones, anthraquinones, naphthaquinones, and mixtures thereof.
References Cited (Backward Citations)
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