US2700641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for contacting vapors with fluidized solids
Assignee: Shell Development Co
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Filing: 1952-02-12
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Granted: 1955-01-25
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Expires: 1972-02-12
Abstract
No abstract record available.
Inventors
- 👤 Charles A Rehbein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:18
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081; B; B01; B01J; B01J8/00; B01J8/005; B01J8/18; B01J8/1845; B01J8/1863; B01J8/24; B01J8/26; C10; C10G; C10G11/00; C10G11/14; C10G11/18; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN THE CATALYTIC CRACKING OF A HYDROCARBON OIL WITH A FINELY DIVIDED SOLID CATALYST WHICH IS CONTINUOUSLY RECIRCULATED THROUGH A REACTION VESSEL AND A SEPARATE REGENERATION VESSEL AND WHEREIN THE FINELY DIVIDED SOLID CATALYST WHICH IS CONTINUOUSLY SUPPLIED TO THE REGENERATION VESSEL IS WITHDRAWN FROM THE REACTION VESSEL BY GRAVITY FLOW FROM A FLUIDIZED BED OF THE CATALYST IN THE REACTION VESSEL, THE IMPROVED METHOD OF OPERATION WHICH COMPRISES MAINTAINING A HIGH LEVEL OF FLUIDIZED CATALYST BED IN THE REACTION ZONE, MAINTAINING A LOW LEVEL OF FLUIDIZED CATALYST IN A CONTIGUOUS STRIPPING ZONE BY AUTOMATIC CONTROL OF THE WITHDRAWAL OF POWER FROM SAID STRIPPING ZONE, SEPARATING SUSPENDED CATALYST PARTICLES FROM THE MIXED VAPOROUS EFFLUENT ABOVE SAID CONTIGUOUS STRIPPING AND REACTION ZONES, PASSING THE THUS SEPARATED CATALYST BY GRAVITY FLOW DIRECTLY
Claim 2
Dependent Claim
130 words
IN THE CATALYTIC CRACKING OF A HYDROCARBON OIL WITH A FINELY DIVIDED SOLID CATALYST WHICH IS CONTINUOUSLY RECIRCULATED THROUGH A REACTION VESSEL AND A SEPARATE REGENERATION VESSEL AND WHEREIN THE FINELY DIVIDED SOLID CATALYST WHICH IS CONTINUOUSLY SUPPLIED TO THE REGENERATION VESSEL IS WITHDRAWN FROM THE REACTION VESSEL BY GRAVITY FLOW FROM A FLUIDIZED BED OF THE CATALYST IN THE REACTION VESSEL, THE IMPROVED METHOD OF OPERATION WHICH COMPRISES MAINTAINING A HIGH LEVEL OF FLUIDIZED CATALYST BED IN THE REACTION ZONE, MAINTAINING A LOW LEVEL OF FLUIDIZED CATALYST IN A CONTIGUOUS STRIPPING ZONE BY AUTOMATIC CONTROL OF THE WITHDRAWAL OF POWER FROM SAID STRIPPING ZONE, SEPARATING SUSPENDED CATALYST PARTICLES FROM THE MIXED VAPOROUS EFFLUENT ABOVE SAID CONTIGUOUS STRIPPING AND REACTION ZONES, PASSING THE THUS SEPARATED CATALYST BY GRAVITY FLOW DIRECTLY
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) | 1958-01-24 | 1958-07-26 | 1959-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-24 | 1962-07-26 | 1963-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-24 | 1966-07-26 | 1967-01-25 | $7700.00 | Window Closed / Lapsed |