Patent US3222293A successfully refreshed from Google Patents.
US3222293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst demetallization
Assignee: Sinclair Research Inc
•
Filing: 1961-01-19
•
Granted: 1965-12-07
•
Expires: 1981-01-19
Abstract
No abstract record available.
Inventors
- 👤 Erickson Henry
- 👤 James P Gallagher
- 👤 Howard G Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:07
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/516
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
IN THE METHOD FOR TREATING A SILICA-BASED CATALYST WHICH HAS BEEN CONTAMINATED WITH METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL AND VANADIUM BY USE IN THE CATALYST CONVERSION OF HYDROCARBONS CONTAINING SAID METAL IN AN AMOUNT SUFFICIENT TO CAUSE DETERIORATION IN SAID CATALYST, THE STEPS WHICH COMPRISE SULFIDING THE CONTAMINATING METAL COMPONENT OF THE CATALYST BY CONTACT WITH SULFIDING VAPORS AT AN ELEVATED TEMPERATURE OF ABOUT 500 TO 1500*F., CONTACTING THE CATALYST WITH DILUTE AQUEOUS NITRIC ACID, FEEDING THE RESULTING AQUEOUS SLURRY TO A ROTATING PAN FILTER, PASING THE PAN THROUGH A SERIES OF ZONES WHERE, IN THE FIRST ZONE OXYGEN-CONTAINING AERATION GAS IS PASSED INTO THE SLURRY IN THE PAN, IN A SUCCEEDING ZONE LIQUID IS DRAINED FROM THE PAN, IN A FURTHER SUCCEEDING ZONE WATER IS PASSED TO THE PAN TO WASH THE CATALYST AND THE WASH WATER IS DRAINED, IN A FURTHER SUCCEEDING ZONE DILUTE AQUEOUS AMMONIA SOLUTION IS PASSED TO THE PAN AND REMOVING CATALYST FILTER CAKE FROM THE PAN AND RETURNING SAID CATALYST TO THE HYDROCARBON CONVERSION SYSTEM.
Claim 2
Dependent Claim
174 words
IN THE METHOD FOR TREATING A SILICA-BASED CATALYST WHICH HAS BEEN CONTAMINATED WITH METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL AND VANADIUM BY USE IN THE CATALYST CONVERSION OF HYDROCARBONS CONTAINING SAID METAL IN AN AMOUNT SUFFICIENT TO CAUSE DETERIORATION IN SAID CATALYST, THE STEPS WHICH COMPRISE SULFIDING THE CONTAMINATING METAL COMPONENT OF THE CATALYST BY CONTACT WITH SULFIDING VAPORS AT AN ELEVATED TEMPERATURE OF ABOUT 500 TO 1500*F., CONTACTING THE CATALYST WITH DILUTE AQUEOUS NITRIC ACID, FEEDING THE RESULTING AQUEOUS SLURRY TO A ROTATING PAN FILTER, PASING THE PAN THROUGH A SERIES OF ZONES WHERE, IN THE FIRST ZONE OXYGEN-CONTAINING AERATION GAS IS PASSED INTO THE SLURRY IN THE PAN, IN A SUCCEEDING ZONE LIQUID IS DRAINED FROM THE PAN, IN A FURTHER SUCCEEDING ZONE WATER IS PASSED TO THE PAN TO WASH THE CATALYST AND THE WASH WATER IS DRAINED, IN A FURTHER SUCCEEDING ZONE DILUTE AQUEOUS AMMONIA SOLUTION IS PASSED TO THE PAN AND REMOVING CATALYST FILTER CAKE FROM THE PAN AND RETURNING SAID CATALYST TO THE HYDROCARBON CONVERSION SYSTEM.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |