Patent US2358119A successfully refreshed from Google Patents.
US3275407A
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Method of recovery of ammonia and sulfur dioxide
Assignee: Davy McKee AG
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Filing: 1962-08-28
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Granted: 1966-09-27
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Expires: 1982-08-28
Abstract
No abstract record available.
Inventors
- 👤 Furkert Herbert
- 👤 Schertz Rosina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:02
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/12; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/501; C01B17/504; C01B17/58; C01C1/026; C01C1/028
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
A PROCESS FOR RECOVERING OF AMMONIA AND SULFUR IN THE FORM OF SULFUR DIOXIDE FROM AQUEUOS SUFLRIC ACID SOLUTIONS CONTAINING AMMONIUM HYDROGEN SULFATE AND AMMONIUM SULFATE, COMPRISING THE STEPS OF BURNING A GAS SELECTED FROM THE GROUP CONSISTING OF COKE OVEN GAS, GENERATOR GAS AND NAUTRAL GAS WITH AIR. TREATING SAID GAS EMERGING FROM SAID BURNING STEP BY PASSAGE THROUGH RED HOT COKE, FEEDING SAID GAS EMERGING FROM SAID BURNING STEP IN AN AIRTIGHT REACTION CHAMBER, CONTAINING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF COKE AND CHARCOAL, FEEDING SAID AQUEOUS SULFURIC ACID SOLUTION INTO SAID REACTION CHAMBER, MAINTAINING SAID REACTION CHAMBER AT A TEMPERATURE RANGE OF BETWEEN 370*C. AND 400*C., AND WITHDRAWING FROM SAID REACTION CHAMBER AMMONIA SULFUR DIOXIDE CARBON DIOXIDE AND WATER VAPOR.
References Cited (Backward Citations)
US2926070A
Cited
US2927001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |