Patent US1967060A successfully refreshed from Google Patents.
Patent US3934012A successfully refreshed from Google Patents.
US3934012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating hydrogen sulfide from carbon dioxide
Assignee: Texaco Inc
•
Filing: 1974-04-22
•
Granted: 1976-01-20
•
Expires: 1994-04-22
Abstract
Abstract Hydrogen sulfide gas may be separated from a mixture of hydrogen sulfide and carbon dioxide by passing the gaseous mixture through an aqueous solution of bicarbonate ions.
Inventors
- 👤 Vernon Hugo Schievelbein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:53
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: 30
Claim 1
Independent Claim
52 words
A method for preferentially removing hydrogen sulfide from a gas mixture comprising hydrogen sulfide and carbon dioxide which comprises treating the gas mixture at atmospheric pressure with an aqueous solution consisting of inert salts and bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide.
Claim 2
Independent Claim
52 words
A method for preferentially removing hydrogen sulfide from a gas mixture comprising hydrogen sulfide and carbon dioxide which comprises treating the gas mixture at atmospheric pressure with an aqueous solution consisting of inert salts and bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide.
Claim 3
Dependent Claim
18 words
A method as in claim 1 wherein the bicarbonate ions arise from the dissolution of a bicarbonate salt.
Claim 4
Dependent Claim
15 words
A method as in claim 2 wherein the bicarbonate salt has an alkali metal cation.
Claim 5
Dependent Claim
28 words
A method as in claim 2 wherein the bicarbonate salt is present in an amount from about 0.01 gram moles per liter to about 0.25 gram-moles per liter.
Claim 6
Dependent Claim
21 words
A method as in claim 1 wherein the bicarbonate arises from the reaction between a carbonate ion solution and carbon dioxide.
Claim 7
Dependent Claim
20 words
A method as in claim 5 wherein the cation in solution with the carbonate anion is an alkali metal cation.
Claim 8
Dependent Claim
27 words
A method as in claim 5 wherein the carbonate salt is present in an amount from about 0.01 gram-moles per liter to about 0.25 gram-moles per liter.
Claim 9
Dependent Claim
23 words
A method as in claim 1 wherein the bicarbonate ions arise from the reaction between an acid phosphate ion solution and carbon dioxide.
Claim 10
Dependent Claim
21 words
A method as in claim 8 wherein the cation in solution with the acid phosphate anion is an alkali metal cation.
Claim 11
Dependent Claim
28 words
A method as in claim 8 wherein the acid phosphate salt is present in an amount from about 0.01 gram-moles per liter to about 0.25 gram-moles per liter.
Claim 12
Independent Claim
53 words
A method for preferentially removing hydrogen sulfide from a gas mixture consisting of hydrogen sulfide and carbon dioxide which comprises treating the gas mixture at atmospheric pressure with an aqueous solution consisting of inert salts and bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide.
Claim 13
Independent Claim
53 words
A method for preferentially removing hydrogen sulfide from a gas mixture consisting of hydrogen sulfide and carbon dioxide which comprises treating the gas mixture at atmospheric pressure with an aqueous solution consisting of inert salts and bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide.
Claim 14
Dependent Claim
18 words
A method as in claim 11 wherein the bicarbonate ions arise from the dissolution of a bicarbonate salt.
Claim 15
Dependent Claim
29 words
A method as in claim 12 wherein the bicarbonate salt is present in an amount from about 0.01 gram moles per liter to about 0.25 gram moles per liter.
Claim 16
Independent Claim
49 words
A method for preferentially removing hydrogen sulfide from a gas mixture comprising hydrogen sulfide and carbon dioxide which comprises treating the gas mixture at atmospheric pressure with an aqueous solution consisting of bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide.
Claim 17
Independent Claim
49 words
A method for preferentially removing hydrogen sulfide from a gas mixture comprising hydrogen sulfide and carbon dioxide which comprises treating the gas mixture at atmospheric pressure with an aqueous solution consisting of bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide.
Claim 18
Dependent Claim
18 words
A method as in claim 14 wherein the bicarbonate ions arise from the dissolution of a bicarbonate salt.
Claim 19
Dependent Claim
15 words
A method as in claim 15 wherein the bicarbonate salt has an alkali metal cation.
Claim 20
Dependent Claim
27 words
A method as in claim 15 wherein the bicarbonate salt is present in an amount from about 0.01 gram/moles per liter to about 0.25 gram/moles per liter.
Claim 21
Dependent Claim
21 words
A method as in claim 14 wherein the bicarbonate arises from the reaction between a carbonate ion solution and carbon dioxide.
Claim 22
Dependent Claim
20 words
A method as in claim 18 wherein the cation in solution with the bicarbonate anion is an alkali metal cation.
Claim 23
Dependent Claim
27 words
A method as in claim 19 wherein the carbonate salt is present in an amount from about 0.01 gram/moles per liter to about 0.25 gram/moles per liter.
Claim 24
Dependent Claim
23 words
A method as in claim 14 wherein the bicarbonate ions arise from the reaction between an acid phosphate ion solution and carbon dioxide.
Claim 25
Dependent Claim
21 words
A method as in claim 21 wherein the cation in solution with the acid phosphate anion is an alkali metal cation.
Claim 26
Dependent Claim
28 words
A method as in claim 21 wherein the acid phosphate salts is present in an amount from about 0.01 gram/moles per liter to about 0.25 gram/moles per liter.
Claim 27
Independent Claim
50 words
A method for preferentially removing hydrogen sulfide from a gas mixture consisting of hydrogen sulfide and carbon dioxide which comprises treating the gas mixture at atmospheric pressure with an aqueous solution consisting of bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide.
Claim 28
Independent Claim
50 words
A method for preferentially removing hydrogen sulfide from a gas mixture consisting of hydrogen sulfide and carbon dioxide which comprises treating the gas mixture at atmospheric pressure with an aqueous solution consisting of bicarbonate ions in sufficient concentration to establish an equilibrium imbalance to prevent substantial dissolution of carbon dioxide.
Claim 29
Dependent Claim
18 words
A method as in claim 24 wherein the bicarbonate ions arise from the dissolution of a bicarbonate salt.
Claim 30
Dependent Claim
27 words
A method as in claim 25 wherein the bicarbonate salt is present in an amount from about 0.01 gram/moles per liter to about 0.25 gram/moles per liter.
References Cited (Backward Citations)
US1918153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |