Patent US2777802A successfully refreshed from Google Patents.
US2777802A
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Extractive distillation operation for preparation of catalytic cracking feed stocks
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-12-10
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Granted: 1957-01-15
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Expires: 1974-12-10
Abstract
No abstract record available.
Inventors
- 👤 Nick P Peet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:39
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN A DISTILLATION PROCESS WHEREIN A METALS CONTAMINATED PETROLIEUM HYDROCARBON FEED STOCK CONTAINING A SUBSTANTIAL PORTION OF HYDROCARBON CONSTITUENTS BOILING ABOVE 900*F. IS CHARGED TO A DISTILLATION TOWER AND FRACTIONATED THEREIN TO SEGREGATE AT LEAST A HEAVY GAS OIL DISTILLATE FRACTION INCLUDING SAID CONSTITUENTS BOILING ABOVE 900*F., THE IMPROVEMENT WHICH COMPRISES COUNTERCURRENTLY CONTACTING SAID CONSTITUENTS BOILING ABOVE 900* F. IN VAPOR PHASE IN SAID TOWER PRIOR TO WITHDRAWAL OF THE SAME UNDER EXTRACTIVE DISTILLATION CONDITIONS WITH A REFLUXING AGENT INTRODUCED INTO SAID TOWER BELOW THE POINT OF WITHDRAWAL OF THE HEAVIEST DISTILLATE FRACTION, SAID REFLUXING AGENT COMPRISING AN EXTRANEOUSLY DERIVED HIGH MOLECULAR WEIGHT ASPHALTIC MATERIAL SUBSTANTIALLY FREE FROM METAL CONTAMINMANTS, WHEREBY A HEAVY GAS OIL FRACTION HAVING A SIGNIFICANTLY REDUCED CONTENT OF METAL CONTAMINANTS IS OBTAINED.
Claim 2
Dependent Claim
126 words
IN A DISTILLATION PROCESS WHEREIN A METALS CONTAMINATED PETROLIEUM HYDROCARBON FEED STOCK CONTAINING A SUBSTANTIAL PORTION OF HYDROCARBON CONSTITUENTS BOILING ABOVE 900*F. IS CHARGED TO A DISTILLATION TOWER AND FRACTIONATED THEREIN TO SEGREGATE AT LEAST A HEAVY GAS OIL DISTILLATE FRACTION INCLUDING SAID CONSTITUENTS BOILING ABOVE 900*F., THE IMPROVEMENT WHICH COMPRISES COUNTERCURRENTLY CONTACTING SAID CONSTITUENTS BOILING ABOVE 900* F. IN VAPOR PHASE IN SAID TOWER PRIOR TO WITHDRAWAL OF THE SAME UNDER EXTRACTIVE DISTILLATION CONDITIONS WITH A REFLUXING AGENT INTRODUCED INTO SAID TOWER BELOW THE POINT OF WITHDRAWAL OF THE HEAVIEST DISTILLATE FRACTION, SAID REFLUXING AGENT COMPRISING AN EXTRANEOUSLY DERIVED HIGH MOLECULAR WEIGHT ASPHALTIC MATERIAL SUBSTANTIALLY FREE FROM METAL CONTAMINMANTS, WHEREBY A HEAVY GAS OIL FRACTION HAVING A SIGNIFICANTLY REDUCED CONTENT OF METAL CONTAMINANTS IS OBTAINED.
References Cited (Backward Citations)
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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) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |