US3846536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration process for flue gas sorbent
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1972-09-07
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Granted: 1974-11-05
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Expires: 1992-09-07
Abstract
Abstract A dry solid sorbent used in cyclic regenerative processes for removing sulfur dioxide from waste gas streams is regenerated with a lower aliphatic alcohol such as methanol. Copper oxide supported on a high surface area alumina is a preferred sorbent which can be regenerated in this manner. Preferred regeneration temperatures are about 600*-900*F.
Inventors
- 👤 N Cull
- 👤 D Vohsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:05
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/508; C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/60
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
81 words
IN A PROCESS FOR REMOVING SO2 FROM A GAS MIXTURE IN WHICH SAID GAS MIXTURE IS CONTACTED UNDER OXIDIZING CONDITIONS WITH A SOLID SORBENT WHICH IS SELECTIVE FOR THE REMOVAL OF SO2 AND IN WHICH SAID SORBENT IS REGENERATED WITH A REDUCING GAS, THE IMPROVEMENT WHEREIN SAID REDUCING GAS COMPRISES AN ALCOHOL HAVING FROM 1 TO ABOUT 6 CARBON ATOMS AND WHEREIN SAID SORBENT IS CONTACTED WITH SAID ALCOHOL AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 600* TO ABOUT 1,000*F.
Claim 2
Dependent Claim
81 words
IN A PROCESS FOR REMOVING SO2 FROM A GAS MIXTURE IN WHICH SAID GAS MIXTURE IS CONTACTED UNDER OXIDIZING CONDITIONS WITH A SOLID SORBENT WHICH IS SELECTIVE FOR THE REMOVAL OF SO2 AND IN WHICH SAID SORBENT IS REGENERATED WITH A REDUCING GAS, THE IMPROVEMENT WHEREIN SAID REDUCING GAS COMPRISES AN ALCOHOL HAVING FROM 1 TO ABOUT 6 CARBON ATOMS AND WHEREIN SAID SORBENT IS CONTACTED WITH SAID ALCOHOL AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 600* TO ABOUT 1,000*F.
Claim 3
Dependent Claim
14 words
The improvement of claim 1 wherein said solid sorbent comprises copper oxide on alumina.
Claim 4
Dependent Claim
12 words
The improvement of claim 1 wherein said reducing gas also comprises steam.
Claim 5
Dependent Claim
11 words
The improvement of claim 1 wherein said reducing gas is methanol.
Claim 6
Dependent Claim
16 words
The improvement of claim 1 wherein said reducing gas is a mixture of methanol and steam.
Claim 7
Dependent Claim
73 words
A process for removing SO2 from a gas mixture containing the same which comprises: a. contacting said gas mixture under oxidizing conditions and at a gas inlet temperature of about 600*-1,000*F. with a solid sorbent which is selective for the removal of SO2; and b. regenerating said sorbent with a reducing gas comprising one or more alcohols having from 1 to six carbon atoms at a temperature of about 600*F. to about 1,000*F.
Claim 8
Dependent Claim
73 words
A process for removing SO2 from a gas mixture containing the same which comprises: a. contacting said gas mixture under oxidizing conditions and at a gas inlet temperature of about 600*-1,000*F. with a solid sorbent which is selective for the removal of SO2; and b. regenerating said sorbent with a reducing gas comprising one or more alcohols having from 1 to six carbon atoms at a temperature of about 600*F. to about 1,000*F.
Claim 9
Dependent Claim
16 words
A process according to claim 6 in which said solid sorbent comprises copper oxide on alumina.
Claim 10
Dependent Claim
13 words
A process according to claim 6 in which said reducing gas is methanol.
Claim 11
Dependent Claim
16 words
The process of claim 6 wherein said reducing gas is a mixture of methanol and steam.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |