US2850437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for controlling catalytic cracking process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-12-10
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Granted: 1958-09-02
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Expires: 1974-12-10
Abstract
No abstract record available.
Inventors
- 👤 Edward A Kelso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:00
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; B; B01; B01J; B01J21/00; B01J21/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR OVERCOMING THE DELETERIOUS EFFECT OF NICKEL CATALYST CONTAMINATION IN THE FLUIDIZED CATALYTIC CRACKING OF A NICKEL-CONTAMINATED HYDROCARBON FEED STOCK CONTAINING A SUBSTANTIAL PORTION OF COMPONENTS BOILING ABOVE 900*F. WHICH COMPRISES CONDUCTING SAID FLUIDIZED CATALYTIC CRACKING DURING A FIRST PERIOD OF OPERATION WHILE MAINTAINING A SUBSTANTIALLY CONSTANT AMOUNT, WITHIN THE RANGE OF ABOUT 0.3 TO 1 WEIGHT PERCENT, OF CARBON ON THE CATALYST TO THEREBY PROVIDE FOR THE PRODUCTION OF NOT MORE THAN A PREDETERMINED MAXIMUM AMOUNT OF HYDROGEN AND THEREAFTER REDUCING THE AMOUNT OF CARBON ON THE CATALYST TO SUCCESSIVELY LOWER LEVELS AS THE AMOUNT OF NICKEL DEPOSITED ON THE CATALYST BY THE FEED STOCK IS INCREASED, TO
Claim 2
Dependent Claim
111 words
A PROCESS FOR OVERCOMING THE DELETERIOUS EFFECT OF NICKEL CATALYST CONTAMINATION IN THE FLUIDIZED CATALYTIC CRACKING OF A NICKEL-CONTAMINATED HYDROCARBON FEED STOCK CONTAINING A SUBSTANTIAL PORTION OF COMPONENTS BOILING ABOVE 900*F. WHICH COMPRISES CONDUCTING SAID FLUIDIZED CATALYTIC CRACKING DURING A FIRST PERIOD OF OPERATION WHILE MAINTAINING A SUBSTANTIALLY CONSTANT AMOUNT, WITHIN THE RANGE OF ABOUT 0.3 TO 1 WEIGHT PERCENT, OF CARBON ON THE CATALYST TO THEREBY PROVIDE FOR THE PRODUCTION OF NOT MORE THAN A PREDETERMINED MAXIMUM AMOUNT OF HYDROGEN AND THEREAFTER REDUCING THE AMOUNT OF CARBON ON THE CATALYST TO SUCCESSIVELY LOWER LEVELS AS THE AMOUNT OF NICKEL DEPOSITED ON THE CATALYST BY THE FEED STOCK IS INCREASED, TO
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) | 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 |