Patent US2770576A successfully refreshed from Google Patents.
US2770576A
Expired / Lapsed
US
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Preparation of catalytic cracking feed
Assignee: MW Kellogg Co
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Filing: 1954-06-03
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Granted: 1956-11-13
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Expires: 1974-06-03
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:43
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/10; C10G67/00; C10G67/02; C10G67/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A METHOD FOR PREPARING A CHARGE OIL FOR CATALYTIC CARCKING, WHICH INCLUDES THE STEPS OF: HEATING AN ATMOSPHERIC REDUCED CRUDE AND INTRODUCING IT INTO A VACUUM FLASHING TOWER AT A TEMPERATURE SUFFICIENTLY HIGH TO MAINTAIN WITH SAID LOWER A FLASHING TEMPERATURE WITHIN THE RANGE OF ABOUT 100* F. BELOW THAT AT WHICH SUBSTANTIAL THERMAL DECOMPOSITION BEGINS TO TAKE PLACE; WITHDRAWING FROM SAID TOWER A VACUUM BOTTOMS CONTAINING AT LEAST 25% OF THE OIL SUITABLE FOR CATALYTIC CRACKING; COOLING SAID VACUUM BOTTOMS AND INTORDUCING IT INTO A VERTICALLY EXTENDED FRACTIONATION ZONE AND COUNTER-CURRENTLY CONTACTING IT THEREIN WITH AN UPFLOWING STREAM OF NORMALLY GASEOUS HYDROCARBON SOLVENT AT TEMPERATURES WITHIN 100* F. BELOW THE CRITICAL TEMPERATURE OF SAID SOLVENT TO FRACTIONATE SAID VACUUM BOTTOMS INTO AN ASPHALT RAFFINATE AND A DECARBONIZED OIL EXTRACT; AND WITHDRAWING HOT VAPORS FROM SAID FLASHING TOWER AND EXTRACT PHASE FROM SAID FRACTIONATION ZONE AND PASSING THEM IN INDIRECT HEAT EXCHANGE WITH EACH OTHER TO CONDENSE MOST OF SAID VAPORS AND TO AT LEAST PARTIALLY EVAPORATE SOLVENT FROM SAID EXTRACT PHASE.
Claim 2
Independent Claim
172 words
A METHOD FOR PREPARING A CHARGE OIL FOR CATALYTIC CARCKING, WHICH INCLUDES THE STEPS OF: HEATING AN ATMOSPHERIC REDUCED CRUDE AND INTRODUCING IT INTO A VACUUM FLASHING TOWER AT A TEMPERATURE SUFFICIENTLY HIGH TO MAINTAIN WITH SAID LOWER A FLASHING TEMPERATURE WITHIN THE RANGE OF ABOUT 100* F. BELOW THAT AT WHICH SUBSTANTIAL THERMAL DECOMPOSITION BEGINS TO TAKE PLACE; WITHDRAWING FROM SAID TOWER A VACUUM BOTTOMS CONTAINING AT LEAST 25% OF THE OIL SUITABLE FOR CATALYTIC CRACKING; COOLING SAID VACUUM BOTTOMS AND INTORDUCING IT INTO A VERTICALLY EXTENDED FRACTIONATION ZONE AND COUNTER-CURRENTLY CONTACTING IT THEREIN WITH AN UPFLOWING STREAM OF NORMALLY GASEOUS HYDROCARBON SOLVENT AT TEMPERATURES WITHIN 100* F. BELOW THE CRITICAL TEMPERATURE OF SAID SOLVENT TO FRACTIONATE SAID VACUUM BOTTOMS INTO AN ASPHALT RAFFINATE AND A DECARBONIZED OIL EXTRACT; AND WITHDRAWING HOT VAPORS FROM SAID FLASHING TOWER AND EXTRACT PHASE FROM SAID FRACTIONATION ZONE AND PASSING THEM IN INDIRECT HEAT EXCHANGE WITH EACH OTHER TO CONDENSE MOST OF SAID VAPORS AND TO AT LEAST PARTIALLY EVAPORATE SOLVENT FROM SAID EXTRACT PHASE.
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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |