US2774800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for hydrolyzing sulfonic acids
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-08-23
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Granted: 1956-12-18
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Expires: 1974-08-23
Abstract
No abstract record available.
Inventors
- 👤 Albert J Shmidl
- 👤 James L Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:37
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/90; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
IN A CONTINUOUS METHOD FOR HYDROLYZING AROMATIC HYDROCARBON SULFORNIC ACIDS WHEREIN SAID SULFONIC ACIDS, WATER AND STREAM OF CONCENTRATED SULFURIC ACID ARE CONTINUOUSLY CHARGED TO A HYDROLYSIS ZONE HAVING A TEMPERATURE WITHIN THE RANGE FROM ABOUT 280* TO 310* F. IN AMOUNTS SUFFICIENT TO CAUSE HYDROLYSIS OF SAID SULFONIC ACIDS TO FORM AN AROMATIC HYDROCARBON FRACTION AND A DILUTE SULFURIC ACID FRACTION AND WHEREIN THE SAID HYDROCARBON FRACTION AND THE SAID DILUTE SULFURIC ACID FRACTION ARE CONTINUOUSLY WITHDRAWN FROM SAID HYDROLYSIS ZONE, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF PASSING SAID DILUTE SULFURIC ACID FRACTION INTO AN ACID CONCENTRATION ZONE AND THERE DISCHARGING A HIGH TEMPERATURE INERT GAS THROUGH SAID SULFURIC ACID FRACTION TO CONCENTRATE THE SULFURIC ACID AND TO HEAT THE SAME TO A TEMPERATURE ABOVE THE TEMPERATURE OF SAID HYDROLYSIS ZONE AND CONTINUOUSLY RECYCLING AT LEAST A PORTION OF THE SAID HEATED CONCENTRATED SULFURIC ACID TO SAID HYDROLYSIS ZONE AS THE CONCENTRATED SULFURIC ACID CHARGE STREAM, SAID RECYCLED PORTION OF SAID HEATED CONCENTRATED SULFURIC ACID BEING INTRODUCED INTO SAID HYDROLYSIS ZONE AT A TEMPERATURE ABOVE THE TEMPERATURE OF SAID HYROLYSIS ZONE IN AN AMOUNT SUFFICIENT TO MAINTAIN THE TEMPERATURE OF SAID HYDROLYSIS ZONE WITHIN SAID RANGE OF ABOUT 280* TO 210* F.
Claim 2
Dependent Claim
204 words
IN A CONTINUOUS METHOD FOR HYDROLYZING AROMATIC HYDROCARBON SULFORNIC ACIDS WHEREIN SAID SULFONIC ACIDS, WATER AND STREAM OF CONCENTRATED SULFURIC ACID ARE CONTINUOUSLY CHARGED TO A HYDROLYSIS ZONE HAVING A TEMPERATURE WITHIN THE RANGE FROM ABOUT 280* TO 310* F. IN AMOUNTS SUFFICIENT TO CAUSE HYDROLYSIS OF SAID SULFONIC ACIDS TO FORM AN AROMATIC HYDROCARBON FRACTION AND A DILUTE SULFURIC ACID FRACTION AND WHEREIN THE SAID HYDROCARBON FRACTION AND THE SAID DILUTE SULFURIC ACID FRACTION ARE CONTINUOUSLY WITHDRAWN FROM SAID HYDROLYSIS ZONE, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF PASSING SAID DILUTE SULFURIC ACID FRACTION INTO AN ACID CONCENTRATION ZONE AND THERE DISCHARGING A HIGH TEMPERATURE INERT GAS THROUGH SAID SULFURIC ACID FRACTION TO CONCENTRATE THE SULFURIC ACID AND TO HEAT THE SAME TO A TEMPERATURE ABOVE THE TEMPERATURE OF SAID HYDROLYSIS ZONE AND CONTINUOUSLY RECYCLING AT LEAST A PORTION OF THE SAID HEATED CONCENTRATED SULFURIC ACID TO SAID HYDROLYSIS ZONE AS THE CONCENTRATED SULFURIC ACID CHARGE STREAM, SAID RECYCLED PORTION OF SAID HEATED CONCENTRATED SULFURIC ACID BEING INTRODUCED INTO SAID HYDROLYSIS ZONE AT A TEMPERATURE ABOVE THE TEMPERATURE OF SAID HYROLYSIS ZONE IN AN AMOUNT SUFFICIENT TO MAINTAIN THE TEMPERATURE OF SAID HYDROLYSIS ZONE WITHIN SAID RANGE OF ABOUT 280* TO 210* F.
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) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |