US3716620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing traces of hydrogen sulfide and mercaptans from gases
Assignee: IFP Energies nouvelles
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Filing: 1970-10-27
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Granted: 1973-02-13
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Expires: 1990-10-27
Abstract
Abstract A process for purifying a gas containing hydrogen sulfide or a mercaptan, wherein said gas is contacted with a solution of iodine in an organic solvent, said organic solvent also containing an amine.
Inventors
- 👤 A Deschamps
- 👤 S Franckowiak
- 👤 P Renault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:07
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/16; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52; B01D53/523
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
77 words
A process for purifying a gas containing hydrogen sulfide or a mercaptan, wherein said gas is contacted with a solution of iodine in an organic solvent, said organic solvent also containing an amine, said organic solvent being selected from the group consisting of sulfoxides; glycols, ethers, and esters thereof; aromatic hydrocarbons; aromatic ethers; amides; pyrrolidones; piperidones; sulfones; phosphoric acid esters of 6-30 carbon atoms; carboxylic acid esters of 3-24 carbon atoms of monohydric alcohols, and mixtures thereof.
Claim 2
Dependent Claim
77 words
A process for purifying a gas containing hydrogen sulfide or a mercaptan, wherein said gas is contacted with a solution of iodine in an organic solvent, said organic solvent also containing an amine, said organic solvent being selected from the group consisting of sulfoxides; glycols, ethers, and esters thereof; aromatic hydrocarbons; aromatic ethers; amides; pyrrolidones; piperidones; sulfones; phosphoric acid esters of 6-30 carbon atoms; carboxylic acid esters of 3-24 carbon atoms of monohydric alcohols, and mixtures thereof.
Claim 3
Dependent Claim
26 words
The process of claim 1, wherein the amine is an aliphatic or aromatic mono-, di- or tri-amine, a pyrroline, a pyrrolidine, a piperidine or an alkalonamine.
Claim 4
Dependent Claim
23 words
The process of claim 2, wherein the amine is an alkanolamine containing two-12 carbon atoms, 1-3 amine groups and one- four OH groups.
Claim 5
Dependent Claim
10 words
The process of claim 3, wherein the amine is diethanolamine.
Claim 6
Dependent Claim
23 words
The process of claim 1, wherein the amine concentration is 0.05 to 10 percent by weight, with respect to the reaction liquid phase.
Claim 7
Dependent Claim
23 words
The process of claim 1, wherein the amine concentration is 0.1 to 1 percent by weight, with respect to the reaction liquid phase.
Claim 8
Dependent Claim
18 words
The process of claim 1, wherein the iodine concentration is 0.005-1 mol. per liter of reaction liquid phase.
Claim 9
Dependent Claim
16 words
The process of claim 1, wherein the iodine solution contains 0.1-1 percent by weight of water.
Claim 10
Dependent Claim
15 words
The process of claim 1, wherein the temperature is 10*-80*C and the pressure 0.1-100 kg/cm2.
Claim 11
Dependent Claim
18 words
The process of claim 1, wherein the impoverished iodine solution is regenerated by contact with an oxidation agent.
Claim 12
Dependent Claim
23 words
The process of claim 10, wherein the oxidation agent is hydrogen peroxide, sodium hypochlorite, ammonium persulfate, ammonium perborate, potassium permanganate, oxygen or ozone.
Claim 13
Dependent Claim
15 words
The process of claim 10, wherein the impoverished iodine solution is regenerated by electrochemical oxidation.
Claim 14
Dependent Claim
14 words
A process as defined by claim 1 wherein said organic solvent is dimethyl sulfoxide.
Claim 15
Dependent Claim
24 words
A process as defined by claim 1 wherein said organic solvent is selected from the group consisting of polyethylene glycol and monoalkyl ethers thereof.
Claim 16
Dependent Claim
22 words
A process as defined by claim 1 wherein said organic solvent is selected from the group consisting of dimethyl formamide and acetamide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |