US2648594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of ammonium sulfate from refinery wastes
Assignee: ExxonMobil Oil Corp
•
Filing: 1951-05-10
•
Granted: 1953-08-11
•
Expires: 1971-05-10
Abstract
No abstract record available.
Inventors
- 👤 Dan A H Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:23
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/24; C01C1/242
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD OF MANUFACTURING AMMONIUM SULFATE WHICH INCLUDES: CONTINUOUSLY INTRODUCING TO A REACTION ZONE AMMONIA, STEAM, AND A MATERIAL CONTAINING SULFURIC ACID, OIL AN OILSOLUBLE CONTAMINANTS; WITHDRAWING FROM SAID REACTION ZONE A SUSPENSION OF AQUEOUS AMMONIUMSULFATE SOLUTION AND LIQUID OIL, SAID LIQUID OIL INCLUDING THE LESS VOLATILE PORTION OF SAID CONTAMINANTS; WITHDRAWING FROM SAID REACTION ZONE STEAM WITH VAPORS OF VOLATILE CONTAMINANTS, SAID WITHDRAWAL OF STEAM BEING SUFFICIENT IN AMOUNT TO YIELD CONCENTRATION OF AT LEAST 5% AMMONIUM SULFATE BY WEIGHT IN SAID WITHDRAWN AQUEOUS SOLUTION; MAINTAINING SUFFICIENT LIQUID WATER IN SAID REACTION ZONE TO PREVENT CRYSTALLIZATION OF
Claim 2
Independent Claim
98 words
A METHOD OF MANUFACTURING AMMONIUM SULFATE WHICH INCLUDES: CONTINUOUSLY INTRODUCING TO A REACTION ZONE AMMONIA, STEAM, AND A MATERIAL CONTAINING SULFURIC ACID, OIL AN OILSOLUBLE CONTAMINANTS; WITHDRAWING FROM SAID REACTION ZONE A SUSPENSION OF AQUEOUS AMMONIUMSULFATE SOLUTION AND LIQUID OIL, SAID LIQUID OIL INCLUDING THE LESS VOLATILE PORTION OF SAID CONTAMINANTS; WITHDRAWING FROM SAID REACTION ZONE STEAM WITH VAPORS OF VOLATILE CONTAMINANTS, SAID WITHDRAWAL OF STEAM BEING SUFFICIENT IN AMOUNT TO YIELD CONCENTRATION OF AT LEAST 5% AMMONIUM SULFATE BY WEIGHT IN SAID WITHDRAWN AQUEOUS SOLUTION; MAINTAINING SUFFICIENT LIQUID WATER IN SAID REACTION ZONE TO PREVENT CRYSTALLIZATION OF
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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |