Fluid catalytic cracking process
Abstract
Abstract A FLUIDIZED CATALYTIC CRACKING PROCESS EMPLOYING MULTIPLE ELONGATED RISER REACTION ZONES WHEREIN A CHARGE STOCK, COMPRISING A LIGHT FRACTION BOILING IN THE 400-650* F. RANGE AND HAVING A POUR POINT OF +10* F. OR HIGHER AND A HEAVY FRACTION BOILING ABOVE 650* F., IS CONVERTED TO PRODUCE SUBSTANTIAL YIELDS OF HIGH OCTANE DEBUTANIZED NAPHTHA AND LIGHT CYCLE GAS OIL BOILING IN 400-650* F. RANGE AND HAVING A POUR POINT OF 0* F. OR LESS. THE LIGHT FRACTION IS SEPARATELY CRACKED IN A SECOND RISER REACTION ZONE ZONE AT HIGH TEMPERATURE AND HIGH CONVERSION FOR CONTROL OF LIGHT CYCLE GAS OIL PRODUCT POUR POINT. THE HEAVY FRACTION IS SEPARATELY CRACKED IN A SECOND RISER REACTION ZONE AT MODERATE TEMPERATURE AND MODERATE CONVERSION FOR CONTROL OF NAPHTHA TO LIGHT CYCLE GAS OIL PRODUCT RATIO.
Inventors
- 👤 D Bunn
- 👤 R Pratt
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |