Patent US2580004A successfully refreshed from Google Patents.
US2580004A
Expired / Lapsed
US
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Removal of iron from regenerated cracking catalyst fines
Assignee: Standard Oil Development Co
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Filing: 1950-02-06
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Granted: 1951-12-25
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Expires: 1970-02-06
Abstract
No abstract record available.
Inventors
- 👤 Hampton G Corneil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:01
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A CATALYST REGENERATION PROCESS IN WHICH A FINELY DIVIDED CATALYST HAVING PARTICLE DIAMETERS IN THE RANGE BETWEEN 0 AND 200 MICRONS IS CIRCULATED FROM A REGENERATION ZONE TO A CRACKING ZONE AND FROM THE CRACKING ZONE TO THE REGENERATION ZONE AND WHEREIN CATALYST IS SUBJECTED TO A HOT COMBUSTION SUPPORTING GAS AT A TEMPERATURE NO GREATER THAN 1200* F. IN SAID REGENERATION ZONE AND CATALYST FINES HAVING A MAJOR PORTION COMPRISING PARTICLE DIAMETERS IN THE RANGE FROM 0 TO 40 MICRONS ARE DISCARDED FROM SAID REGENERATION ZONE, THE STEPS OF RECOVERING SAID CATALYST FINES, CONTACTING SAID RECOVERED CATALYST FINES AT A TEMPERATURE IN THE RANGE BETWEEN 400* TO 700* F. WITH HYDROGEN FLUORIDE AND
Claim 2
Dependent Claim
115 words
IN A CATALYST REGENERATION PROCESS IN WHICH A FINELY DIVIDED CATALYST HAVING PARTICLE DIAMETERS IN THE RANGE BETWEEN 0 AND 200 MICRONS IS CIRCULATED FROM A REGENERATION ZONE TO A CRACKING ZONE AND FROM THE CRACKING ZONE TO THE REGENERATION ZONE AND WHEREIN CATALYST IS SUBJECTED TO A HOT COMBUSTION SUPPORTING GAS AT A TEMPERATURE NO GREATER THAN 1200* F. IN SAID REGENERATION ZONE AND CATALYST FINES HAVING A MAJOR PORTION COMPRISING PARTICLE DIAMETERS IN THE RANGE FROM 0 TO 40 MICRONS ARE DISCARDED FROM SAID REGENERATION ZONE, THE STEPS OF RECOVERING SAID CATALYST FINES, CONTACTING SAID RECOVERED CATALYST FINES AT A TEMPERATURE IN THE RANGE BETWEEN 400* TO 700* F. WITH HYDROGEN FLUORIDE AND
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) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |