US2776930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fines recovery from fluid catalytic conversion system
Assignee: Standard Oil Co
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Filing: 1953-11-23
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Granted: 1957-01-08
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Expires: 1973-11-23
Abstract
No abstract record available.
Inventors
- 👤 Edward D Mckeague
- 👤 Charles B Kenyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:32
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/10; C10G35/14; B; B01; B01J; B01J8/00; B01J8/005; B01J8/0055; B01J8/18; B01J8/20; B01J8/22; B01J8/224; B01J8/228
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
THE METHOD OF RECOVERING EXCESSIVE FINES FROM A FLUIDIZED SOLIDS CONVERSION SYSTEM WHEREIN SUCH EXCESSIVE FINES ARE NOT VENTED WITH REGENERATOR FLUE GAS WHICH METHOD COMPRISES SCRUBBING THE EFFLUENT FROM A REACTION ZONE WITH A LIQUID TO PRODUCE A SLURRY CONTAINING CATALYST PART-CLES BOTH LARGER AND SMALLER THAN THE MINIMUM DESIRED PARTICLE SIZE, SEPARATING FROM SAID SLURRY RELATIVELY COARSE CATALYST PARTICLES LARGER THAN SAID MINIMUM DESIRED PARTICLE SIZE IN A FIRST SEPARATION ZONE, SUBSEQUENTLY SEPARATING FROM SAID SLURRY IN A SECOND SEPARATION ZONE FINE PARTICLES, HAVING A PARTICLE SIZE BELOW ABOUT 20 MICRONS, RETURNING AT LEAST A PART OF SAID SUBSTANTIALLY SOLIDS-FREE LIQUID FROM THE SECOND SEPARATION ZONE TO THE SCRUBBING ZONE REWORKING SAID SEPARATED FINE PARTICLES INTO COAST PARTICLES, RECOMBINING A PORTION OF SAID REWORKED FINE PARTICLES WITH SAID COARSE SOLIDS, AND RETURNING THE RECOMBINED SOLIDS TO THE REACTION ZONE.
Claim 2
Independent Claim
141 words
THE METHOD OF RECOVERING EXCESSIVE FINES FROM A FLUIDIZED SOLIDS CONVERSION SYSTEM WHEREIN SUCH EXCESSIVE FINES ARE NOT VENTED WITH REGENERATOR FLUE GAS WHICH METHOD COMPRISES SCRUBBING THE EFFLUENT FROM A REACTION ZONE WITH A LIQUID TO PRODUCE A SLURRY CONTAINING CATALYST PART-CLES BOTH LARGER AND SMALLER THAN THE MINIMUM DESIRED PARTICLE SIZE, SEPARATING FROM SAID SLURRY RELATIVELY COARSE CATALYST PARTICLES LARGER THAN SAID MINIMUM DESIRED PARTICLE SIZE IN A FIRST SEPARATION ZONE, SUBSEQUENTLY SEPARATING FROM SAID SLURRY IN A SECOND SEPARATION ZONE FINE PARTICLES, HAVING A PARTICLE SIZE BELOW ABOUT 20 MICRONS, RETURNING AT LEAST A PART OF SAID SUBSTANTIALLY SOLIDS-FREE LIQUID FROM THE SECOND SEPARATION ZONE TO THE SCRUBBING ZONE REWORKING SAID SEPARATED FINE PARTICLES INTO COAST PARTICLES, RECOMBINING A PORTION OF SAID REWORKED FINE PARTICLES WITH SAID COARSE SOLIDS, AND RETURNING THE RECOMBINED SOLIDS TO THE REACTION ZONE.
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) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |