US2808125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the separation of carbon dioxide and ammonia
Assignee: Inventa AG fuer Forschung und Patentverwertung
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Filing: 1955-11-17
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Granted: 1957-10-01
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Expires: 1975-11-17
Abstract
No abstract record available.
Inventors
- 👤 Buck Alfred
- 👤 Cramer Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:35
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/12; C01B; C01B32/00; C01B32/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A PROCESS FOR THE SEPARATION OF GAS MIXTURES CONTAINING AMMONIA AND CARBON DIOXIDE BY APPLYING AN AQUEOUS AMMONIUM NITRATE SOLUTION UNDER SUPERPRESSURE AND RAISED TEMPERATURE, AS SELECTIVE ABSORBENT OF SAID GASES, WHICH COMPRISES PASSING THROUGH AN ABSORPTION SYSTEM IN COUNTER-CURRENT TO SAID GAS MIXTURE, UNDER A SUPERPRESSURE RANGING FROM ABOUT 9 TO 11 ATMOSPHERES, OF AN AQUEOUS AMMONIUM NITRATE SOLUTION CONTAINING ABOUT 45-60% BY WEIGHT OF AMMONIUM NITRATE, SAID SOLUTION BEING OF A TEMPERATURE RANGING FROM 137* TO 152* C., RECOVERING CARBON DIOXIDE WHICH ESCAPES FROM SAID ABSORBENT SOLUTION BY FREE PASSAGE THERETHROUGH, PASSING THE ABSORPTION SOLUTION CHARGED WITH AMMONIA, AFTER REDUCING THE PRESSURE THEREOF, INTO A DESORPTION SYSTEM, RELEASING THE ESCAPING AMMONIA AND RECYCLING THE ABSORPTION SOLUTION FREE OF AMMONIA INTO THE ABSORPTION SYSTEM, SAID PROCESS BEING CARRIED OUT BY SUPPLYING SUBSTANTIALLY THE ENTIRE ENERGY NECESSARY FOR THE WHOLE ABSORPTIONDESORPTION IN THE ABSORPTION SYSTEM.
Claim 2
Dependent Claim
145 words
A PROCESS FOR THE SEPARATION OF GAS MIXTURES CONTAINING AMMONIA AND CARBON DIOXIDE BY APPLYING AN AQUEOUS AMMONIUM NITRATE SOLUTION UNDER SUPERPRESSURE AND RAISED TEMPERATURE, AS SELECTIVE ABSORBENT OF SAID GASES, WHICH COMPRISES PASSING THROUGH AN ABSORPTION SYSTEM IN COUNTER-CURRENT TO SAID GAS MIXTURE, UNDER A SUPERPRESSURE RANGING FROM ABOUT 9 TO 11 ATMOSPHERES, OF AN AQUEOUS AMMONIUM NITRATE SOLUTION CONTAINING ABOUT 45-60% BY WEIGHT OF AMMONIUM NITRATE, SAID SOLUTION BEING OF A TEMPERATURE RANGING FROM 137* TO 152* C., RECOVERING CARBON DIOXIDE WHICH ESCAPES FROM SAID ABSORBENT SOLUTION BY FREE PASSAGE THERETHROUGH, PASSING THE ABSORPTION SOLUTION CHARGED WITH AMMONIA, AFTER REDUCING THE PRESSURE THEREOF, INTO A DESORPTION SYSTEM, RELEASING THE ESCAPING AMMONIA AND RECYCLING THE ABSORPTION SOLUTION FREE OF AMMONIA INTO THE ABSORPTION SYSTEM, SAID PROCESS BEING CARRIED OUT BY SUPPLYING SUBSTANTIALLY THE ENTIRE ENERGY NECESSARY FOR THE WHOLE ABSORPTIONDESORPTION IN THE ABSORPTION SYSTEM.
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) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |