US2850462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivation of metal-poisoned catalysts
Assignee: ExxonMobil Oil Corp
•
Filing: 1954-10-20
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Granted: 1958-09-02
•
Expires: 1974-10-20
Abstract
No abstract record available.
Inventors
- 👤 Charles J Piank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:50
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/516
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
A METHOD FOR TREATING A NICKEL-POISONED SILICEOUS ALUMINA CONTAINING HYDROCARBON CONVERSION CATALYST, WHICH COMPRISES IMPREGNATING THE POISONED CATALYST WITH AN AMOUNT OF ALUMINA NOT EXCEEDING ABOUT 5 PERCENT BY WEIGHT, BY BRINGING SAID POISONED CATALYST INTO CONTACT WITH AN ALUMINUM COMPOUND DECOMPOSABLE UPON CALCINATION TO ALUMINA, CALCINING AND THEREAFTER SUBJECTING THE ALUMINA-IMPREGNATED CATALYST TO STREAM-TREATMENT AT A TEMPERATURE IN THE RANGE OF ABOUT 800 TO ABOUT 1500* G. FOR AT LEAST ABOUT 2 HOURS.
Claim 2
Independent Claim
74 words
A METHOD FOR TREATING A NICKEL-POISONED SILICEOUS ALUMINA CONTAINING HYDROCARBON CONVERSION CATALYST, WHICH COMPRISES IMPREGNATING THE POISONED CATALYST WITH AN AMOUNT OF ALUMINA NOT EXCEEDING ABOUT 5 PERCENT BY WEIGHT, BY BRINGING SAID POISONED CATALYST INTO CONTACT WITH AN ALUMINUM COMPOUND DECOMPOSABLE UPON CALCINATION TO ALUMINA, CALCINING AND THEREAFTER SUBJECTING THE ALUMINA-IMPREGNATED CATALYST TO STREAM-TREATMENT AT A TEMPERATURE IN THE RANGE OF ABOUT 800 TO ABOUT 1500* G. FOR AT LEAST ABOUT 2 HOURS.
Claim 3
Independent Claim
78 words
A METHOD FOR TREATING A NICKEL-POISONED SILICEOUS ALUMINA CONTAINING CRACKING CATALYST, WHICH COMPRISES IMPREGNATING SAID CATALYST WITH ALUMINA BY CONTACTING WITH A SOLUTION OF AN ALUMINUM COMPOUND, WHICH CONPOUND DECOMPOSES TO LEAVE A RESIDUE OF ALUMINA UPON SUBSEQUENT CALCINATION OF THE CATALYST, REMOVING THE CATALYST FROM CONTACT WITH SAID SOLUTION, CALCINATING THE SAME, AND SUBJECTING THE CALCINED CATALYST TO STEAM-TREATMENT AT A TEMPERATURE IN THE RANGE OF ABOUT 800 TO ABOUT 1500*F. FOR AT LEAST ABOUT 2 HOURS.
Claim 4
Independent Claim
78 words
A METHOD FOR TREATING A NICKEL-POISONED SILICEOUS ALUMINA CONTAINING CRACKING CATALYST, WHICH COMPRISES IMPREGNATING SAID CATALYST WITH ALUMINA BY CONTACTING WITH A SOLUTION OF AN ALUMINUM COMPOUND, WHICH CONPOUND DECOMPOSES TO LEAVE A RESIDUE OF ALUMINA UPON SUBSEQUENT CALCINATION OF THE CATALYST, REMOVING THE CATALYST FROM CONTACT WITH SAID SOLUTION, CALCINATING THE SAME, AND SUBJECTING THE CALCINED CATALYST TO STEAM-TREATMENT AT A TEMPERATURE IN THE RANGE OF ABOUT 800 TO ABOUT 1500*F. FOR AT LEAST ABOUT 2 HOURS.
References Cited (Backward Citations)
US2440756A
Cited
US2480627A
Cited
US2579123A
Cited
US2651617A
Cited
US2668798A
Cited
US2764557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |