US3875295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for withdrawing hydrogen sulfide from an industrial gas with sulfur production
Assignee: IFP Energies nouvelles
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Filing: 1973-05-30
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Granted: 1975-04-01
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Expires: 1993-05-30
Abstract
Abstract Hydrogen sulfide is removed and sulfur produced by contacting a H2S-containing gas with sulfur dioxide in reduced proportion, so as to form sulfur; the effluent gas, containing residual hydrogen sulfide, is contacted with an absorbent solution for H2S absorption; absorbed H2S is released and burnt for supplying sulfur dioxide.
Inventors
- 👤 Yves Barthel
- 👤 Sigismond Franckowiak
- 👤 Philippe Renault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:58
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/05
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
A PROCESS FOR REMOVING HYDROGEN SULFIDE FROM AN H2SCONTAINING INDUSTRIAL GAS WHILE CONCURRENTLY PRODUCING SULFURSAID PROCESS COMPRISING: A. REACTING SAID H2S-CONTAINING INDUSTRIAL GAS IN A REACTION MIXTURE CONTAINING AN ORGANIC SOLVENT WITH AN SO2CONTAINING GAS THE MOLAR RATIO OF THE H2S : S02 REACTANTS AN EFFLUENT GAS CONTAINING H2S; BEING 2.5 : 1 TO 4 : 1, RESPECTIVELY TO PRODUCE SULFUR AND B. REMOVING THE SULFUR FROM THE REACTION MIXTURE C. PASSING SAID EFFLUENT GAS INTO CONTACT WITH A SOLUTION OF H2S-ABSORBING AGENT TO OBTAIN AN H2S-DEPLETED GASEOUS EFFULENT AND AN H2S-CONTAINING SOLUTION; D.DESORBING SAID H2S-CONTAINING SOLUTION TO OBTAIN H2S; E. BURNING SAID H2S WITH A GAS CONTAINING MOLECULAR OXYGEN TO FORM SULFUR DIOXIDE; AND F. ULITIZING RESULTANT DIOXIDE AS SAID SO2-CONTAINING GAS IN STEP (A).
Claim 2
Dependent Claim
126 words
A PROCESS FOR REMOVING HYDROGEN SULFIDE FROM AN H2SCONTAINING INDUSTRIAL GAS WHILE CONCURRENTLY PRODUCING SULFURSAID PROCESS COMPRISING: A. REACTING SAID H2S-CONTAINING INDUSTRIAL GAS IN A REACTION MIXTURE CONTAINING AN ORGANIC SOLVENT WITH AN SO2CONTAINING GAS THE MOLAR RATIO OF THE H2S : S02 REACTANTS AN EFFLUENT GAS CONTAINING H2S; BEING 2.5 : 1 TO 4 : 1, RESPECTIVELY TO PRODUCE SULFUR AND B. REMOVING THE SULFUR FROM THE REACTION MIXTURE C. PASSING SAID EFFLUENT GAS INTO CONTACT WITH A SOLUTION OF H2S-ABSORBING AGENT TO OBTAIN AN H2S-DEPLETED GASEOUS EFFULENT AND AN H2S-CONTAINING SOLUTION; D.DESORBING SAID H2S-CONTAINING SOLUTION TO OBTAIN H2S; E. BURNING SAID H2S WITH A GAS CONTAINING MOLECULAR OXYGEN TO FORM SULFUR DIOXIDE; AND F. ULITIZING RESULTANT DIOXIDE AS SAID SO2-CONTAINING GAS IN STEP (A).
Claim 3
Dependent Claim
21 words
A process according to claim 1, wherein hydrogen sulfide and sulfur dioxide are contacted in a molar ratio of about 3:1.
Claim 4
Dependent Claim
19 words
A process according to claim 1, wherein the industrial gas contains both hydrogen sulfide and hydrogen or a hydrocarbon.
Claim 5
Dependent Claim
13 words
A process according to claim 1, wherein the H2S-absorbing agent is an amine.
Claim 6
Dependent Claim
29 words
A process according to claim 1, wherein the organic solvent is selected from the group coNsisting of glycols, poly-glycols and esters and ethers of said glycols and said poly-glycols.
Claim 7
Dependent Claim
39 words
A process according to claim 1, wherein the industrial gas also contains carbon dioxide and said effluent gas containing H2S is washed with a sodium or potassium hydroxide solution before the contact with the solution of the H2S-absorbing agent.
Claim 8
Dependent Claim
19 words
A process according to claim 1, wherein said desorbing is conducted by heating the solution containing the absorbed H2S.
Claim 9
Dependent Claim
19 words
A process according to claim 4, wherein said desorbing is conducted by heating the amine solution containing absorbed H2S.
Claim 10
Dependent Claim
39 words
A process according to claim 8, wherein the industrial gas also contains carbon dioxide and said effluent gas containing H2S is washed with a sodium or potassium hydroxide solution before the contact with the solution of the H2S-absorbing agent.
Claim 11
Dependent Claim
23 words
A process according to claim 9, wherein hydrogen sulfide and sulfur dioxide are contacted in a molar ratio of about 3 : 1.
References Cited (Backward Citations)
US2765217A
Cited
US3781445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |