US3674427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for decomposing ammonium sulfate into ammonium bisulfate and ammonia
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1970-01-30
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Granted: 1972-07-04
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Expires: 1990-01-30
Abstract
Abstract AMMONIUM BISULLFATE AND AMMONIA ARE PRODUCED BY THERMAL DECOMPOSITION OF AMMONIUM SULFATE. AN AQUEOUS SLURRY OF AMMONIUM SULFATE IS INTRODUCED INTO A FLOWING STREAM OF HOT COMBUSTION GASES IN A DECOMPOSITION ZONE. THE WATER IS EVAPORATED AND THE AMMONIUM SULFATE IS DECOMPOSED INTO GASEOUS AMMONIA AND MILTEN AMMONIUM BISULFATE, WHICH IS IN THE FORM OF DROPLETS SUSPENDED IN THE FAS STREAM. THE AMMONIUM BISULFATE IS SEPARATED FROM THE GAS STREAM, AND A GAS MIXTURE COMPRISING AMONIA AND HOT COMBUSTION GASES IS WITHDRAWN FROM THE DEXOMPOSITION ZONE.
Inventors
- 👤 Albert B Welty Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:33
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/026; C01C1/028; C01C1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |