US3716619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering carbon monoxide from fuel gas
Assignee: Bethlehem Steel Corp
•
Filing: 1971-03-19
•
Granted: 1973-02-13
•
Expires: 1991-03-19
Abstract
Abstract Carbon monoxide is recovered from a fuel gas by compressing a fuel gas containing carbon monoxide and by reacting the carbon monoxide with a lower alkyl alcohol to form alkyl formate. The formate is separated from the fuel gas, and the carbon monoxide is regenerated by decomposition of the formate.
Inventors
- 👤 J Lynn
- 👤 A Singleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:52
CPC Classifications
C; C10; C10K; C10K3/00; C01; C01B; C01B32/00; C01B32/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A process for recovering carbon monoxide from a fuel gas comprising the steps of: a. compressing a fuel gas containing carbon monoxide at a pressure of about 2500 psig. to about 5000 psig., b. reacting the compressed fuel gas with a lower alkyl alcohol in the presence of an alkali metal alkoxide to form an alkyl formate at from about 60* C. to about 100* C., c. separating the alkyl formate from the compressed fuel gas, and d. decomposing the alkyl formate in the presence of the alkali metal alkoxide at a temperature of about 35* C. to about 200* C. while maintaining the pressure below about 2500 psig. to form lower alkyl alcohol and liberate carbon monoxide therefrom.
Claim 2
Dependent Claim
119 words
A process for recovering carbon monoxide from a fuel gas comprising the steps of: a. compressing a fuel gas containing carbon monoxide at a pressure of about 2500 psig. to about 5000 psig., b. reacting the compressed fuel gas with a lower alkyl alcohol in the presence of an alkali metal alkoxide to form an alkyl formate at from about 60* C. to about 100* C., c. separating the alkyl formate from the compressed fuel gas, and d. decomposing the alkyl formate in the presence of the alkali metal alkoxide at a temperature of about 35* C. to about 200* C. while maintaining the pressure below about 2500 psig. to form lower alkyl alcohol and liberate carbon monoxide therefrom.
Claim 3
Dependent Claim
15 words
A process according to claim 1 in which the fuel gas is blast furnace gas.
Claim 4
Dependent Claim
28 words
A process according to claim 1 in which the lower alkyl alcohol of step (b) is methanol and the alkali metal alkoxide of step (b) is sodium methoxide.
Claim 5
Dependent Claim
34 words
A process according to claim 3 in which the separating step (c) includes cooling the alkyl formate to a temperature of about 15* C. to about 20* C. and venting the compressed fuel gas.
Claim 6
Dependent Claim
60 words
The process according to claim 1 further comprising the steps of: e. recovering the lower alkyl alcohol formed in step (d) and recycling the lower alkyl alcohol to step (b), and f. condensing the lower alkyl alcohol and alkyl formate vapors from step (d) and recycling the lower alkyl alcohol to step (b) and the alkyl formate to step (d).
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 |