US3932583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing hydrogen sulfide from a gas containing carbon dioxide
Assignee: Texaco Inc
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Filing: 1974-04-22
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Granted: 1976-01-13
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Expires: 1994-04-22
Abstract
Abstract A process wherein hydrogen sulfide present in a gas mixture comprising hydrogen sulfide and carbon dioxide is preferentially removed from the gas stream into an aqueous solution where the hydrogen sulfide is oxidized. The aqueous solution has dissolved therein bicarbonate ions, transition metal ions, and oxygen.
Inventors
- 👤 Vernon Hugo Schievelbein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:59
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; Y; Y02; Y02P; Y02P20/00; Y02P20/151
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
86 words
A process for preferentially removing hdyrogen sulfide from a gas mixture comprising hydrogen sulfide and carbon dioxide and converting the hydrogen sulfide to elemental sulfur comprising treating said gas mixture at atmospheric pressure with an aqueous solution consisting of inert salts, dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide, a catalytic quantity of ions of a transition metal and dissolved oxygen in an amount sufficient to stoichiometrically convert all of the hydrogen sulfide to elemental sulfur.
Claim 2
Dependent Claim
86 words
A process for preferentially removing hdyrogen sulfide from a gas mixture comprising hydrogen sulfide and carbon dioxide and converting the hydrogen sulfide to elemental sulfur comprising treating said gas mixture at atmospheric pressure with an aqueous solution consisting of inert salts, dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide, a catalytic quantity of ions of a transition metal and dissolved oxygen in an amount sufficient to stoichiometrically convert all of the hydrogen sulfide to elemental sulfur.
Claim 3
Dependent Claim
32 words
A process as in claim 1 wherein the bicarbonate ions result from the dissolution of a soluble alkali metal bicarbonate and the transition metal ions result from the dissolution of nickel chloride.
Claim 4
Dependent Claim
82 words
A process as in claim 1 wherein the bicarbonate ions result from the dissolution of from about 1 to about 20 gram moles per liter of a soluble alkali metal bicarbonate and the transition metal ions result from the dissolution of from about one part by weight of a soluble transition metal salt per 50 parts by weight of hydrogen sulfide to about 1 part by weight of a soluble transition metal salt to about 200 parts by weight of hydrogen sulfide.
Claim 5
Dependent Claim
24 words
A process as in claim 3 wherein the soluble alkali metal bicarbonate is sodium bicarbonate and the soluble transition metal salt is nickel chloride.
Claim 6
Dependent Claim
24 words
A process as in claim 1 wherein the bicarbonate ions result from the reaction of carbonate ions and carbon dioxide in an aqueous medium.
Claim 7
Dependent Claim
81 words
A process for converting hydrogen sulfide to elemental sulfur wherein the hydrogen sulfide is originally present in a gas mixture consisting of hydrogen sulfide and carbon dioxide said process comprising treating the gas mixture comprising hydrogen sulfide and carbon dioxide at atmospheric pressure with an aqueous solution consisting of inert salts, dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide, a catalytic quantity of ions of a transition metal and dissolved oxygen.
Claim 8
Dependent Claim
81 words
A process for converting hydrogen sulfide to elemental sulfur wherein the hydrogen sulfide is originally present in a gas mixture consisting of hydrogen sulfide and carbon dioxide said process comprising treating the gas mixture comprising hydrogen sulfide and carbon dioxide at atmospheric pressure with an aqueous solution consisting of inert salts, dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide, a catalytic quantity of ions of a transition metal and dissolved oxygen.
Claim 9
Dependent Claim
91 words
A process for preferentially removing hydrogen sulfide from a gas mixture comprising hydrogen sulfide and carbon dioxide and converting the hydrogen sulfide to elemental sulfur comprising treating the gas mixture at atmospheric pressure with an aqueous solution consisting of inert salts, dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide and treating the said aqueous solution containing hydrogen sulfide with oxygen and a catalytic quantity of transition metal ions dissolved in an aqueous medium to convert the hydrogen sulfide to elemental sulfur.
Claim 10
Dependent Claim
91 words
A process for preferentially removing hydrogen sulfide from a gas mixture comprising hydrogen sulfide and carbon dioxide and converting the hydrogen sulfide to elemental sulfur comprising treating the gas mixture at atmospheric pressure with an aqueous solution consisting of inert salts, dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide and treating the said aqueous solution containing hydrogen sulfide with oxygen and a catalytic quantity of transition metal ions dissolved in an aqueous medium to convert the hydrogen sulfide to elemental sulfur.
Claim 11
Dependent Claim
72 words
A process for preferentially removing hydrogen sulfide from a gas mixture consisting of hydrogen sulfide and carbon dioxide and converting the hydrogen sulfide to elemental sulfur comprising treating said gas mixture at atmospheric pressure with an aqueous solution consisting of inert salts, dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide, a catalytic quantity of ions of a transition metal and dissolved oxygen.
Claim 12
Dependent Claim
72 words
A process for preferentially removing hydrogen sulfide from a gas mixture consisting of hydrogen sulfide and carbon dioxide and converting the hydrogen sulfide to elemental sulfur comprising treating said gas mixture at atmospheric pressure with an aqueous solution consisting of inert salts, dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide, a catalytic quantity of ions of a transition metal and dissolved oxygen.
Claim 13
Dependent Claim
84 words
A process for preferentially removing hydrogen sulfide from a gas mixture comprising hydrogen sulfide and carbon dioxide and converting the hydrogen sulfide to elemental sulfur comprising treating said gas mixture at atmospheric pressure with an aqueous solution consisting of dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide, a catalytic quantity of ions of a transition metal and dissolved oxygen in an amount sufficient to stoichiometrically convert all of the hydrogen sulfide to elemental sulfur.
Claim 14
Dependent Claim
84 words
A process for preferentially removing hydrogen sulfide from a gas mixture comprising hydrogen sulfide and carbon dioxide and converting the hydrogen sulfide to elemental sulfur comprising treating said gas mixture at atmospheric pressure with an aqueous solution consisting of dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide, a catalytic quantity of ions of a transition metal and dissolved oxygen in an amount sufficient to stoichiometrically convert all of the hydrogen sulfide to elemental sulfur.
Claim 15
Dependent Claim
32 words
A process as in claim 9 wherein the bicarbonate ions result from the dissolution of a soluble alkali metal bicarbonate and the transition metal ions result from the dissolution of nickel chloride.
Claim 16
Dependent Claim
81 words
A process as in claim 9 wherein the bicarbonate ions result from the dissolution of about 1 to about 20 gram moles per liter of a soluble alkali metal bicarbonate and the transition metal ions result from the dissolution of from about 1 part by wieght of a soluble transition metal salt per 50 parts by weight of hydrogen sulfide to about 1 part by weight of a soluble transition metal salt to about 200 parts by weight of hydrogen sulfide.
Claim 17
Dependent Claim
24 words
A process as in claim 11 wherein the soluble alkali metal bicarbonate is sodium bicarbonate and the soluble transition metal salt is nickel chloride.
Claim 18
Dependent Claim
24 words
A process as in claim 9 wherein the bicarbonate ions result from the reaction of carbonate ions and carbon dioxide in an aqueous medium.
Claim 19
Dependent Claim
79 words
A process for converting hydrogen sulfide to elemental sulfur wherein the hydrogen sulfide is originally present in a gas mixture consisting of hydrogen sulfide and carbon dioxide said process comprising treating the gas mixture comprising hydrogen sulfide and carbon dioxide at atmospheric pressure with an aqueous solution consisting of dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide, a catalytic quantity of ions of a transition metal and dissolved oxygen.
Claim 20
Dependent Claim
79 words
A process for converting hydrogen sulfide to elemental sulfur wherein the hydrogen sulfide is originally present in a gas mixture consisting of hydrogen sulfide and carbon dioxide said process comprising treating the gas mixture comprising hydrogen sulfide and carbon dioxide at atmospheric pressure with an aqueous solution consisting of dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide, a catalytic quantity of ions of a transition metal and dissolved oxygen.
Claim 21
Dependent Claim
95 words
A process for preferentially removing hydrogen sulfide from a gas mixture comprising hydrogen sulfide and carbon dioxide and converting the hydrogen sulfide to elemental sulfur comprising treating the gas mixture at atmospheric pressure with an aqueous solution consisting of dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide to preferentially dissolve the hydrogen sulfide and treating the said aqueous solution containing hydrogen sulfide with oxygen in a catalytic quantity of transition metal ions dissolved in an aqueous medium to convert the hydrogen sulfide to elemental sulfur.
Claim 22
Dependent Claim
95 words
A process for preferentially removing hydrogen sulfide from a gas mixture comprising hydrogen sulfide and carbon dioxide and converting the hydrogen sulfide to elemental sulfur comprising treating the gas mixture at atmospheric pressure with an aqueous solution consisting of dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide to preferentially dissolve the hydrogen sulfide and treating the said aqueous solution containing hydrogen sulfide with oxygen in a catalytic quantity of transition metal ions dissolved in an aqueous medium to convert the hydrogen sulfide to elemental sulfur.
Claim 23
Dependent Claim
70 words
A process for preferentially removing hydrogen sulfide from a gas mixture consisting of hydrogen sulfide and carbon dioxide and converting the hydrogen sulfide to elemental sulfur comprising treating said gas mixture at atmospheric pressure with an aqueous solution consisting of dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide, a catalytic quantity of ions of a transition metal and dissolved oxygen.
Claim 24
Dependent Claim
70 words
A process for preferentially removing hydrogen sulfide from a gas mixture consisting of hydrogen sulfide and carbon dioxide and converting the hydrogen sulfide to elemental sulfur comprising treating said gas mixture at atmospheric pressure with an aqueous solution consisting of dissolved bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide, a catalytic quantity of ions of a transition metal and dissolved oxygen.
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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |