US2662843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shale oil refining
Assignee: Shell Development Co
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Filing: 1951-05-25
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Granted: 1953-12-15
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Expires: 1971-05-25
Abstract
No abstract record available.
Inventors
- 👤 Robert C Castner
- 👤 Raymond C Archibald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:43
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
THE METHOD FOR THE PRODUCTION OF A SHALE OIL PRODUCT HAVING IMPROVED CATALYTIC CRACKING PROPERTIES FROM SHALE OIL, WHICH METHOD COMPRISES: (1) INTIMATELY CONTACTING THE SHALE OIL WITH FROM ABOUT TWO TO ABOUT TEN STOICHIOMETRICAL PROPORTIONS OF FORMIC ACID FOR EACH ATOMIC PROPORTION OF NITROGEN PRESENT IN SAID SHALE OIL TO REDUCE THE NITROGEN CONTENT OF RESULTING RAFFINATE OIL PHASE TO A VALUE OF FROM ABOUT 0.4% TO ABOUT 0.9% BY WEIGHT; (2) SEPARATING RESULTING EXTRACT AND RAFFINATE PHASES; (3) RECOVERING DISSOLVED FORMIC ACID FROM THE SEPARATED RAFFINATE PHASE AND RETURNING IT FOR FURTHER EXTRACTION USE; AND (4) RECOVERING FORMIC ACID FROM THE SEPARATED EXTRACT PHASE BY DISTILLATION IN THE PRESENCE OF A LIGHT ESSENTIALLY NON-AROMATIC HYDROCARBON UNDER CONDITIONS TO MAINTAIN FORMIC ACID AND FORMATES IN THE DISTILLING ZONE A TEMPERATURE BELOW ABOUT 165% C. AND RETURNING THE RECOVERED FORMIC ACID FOR FURTHER EXTRACTION USE.
Claim 2
Independent Claim
145 words
THE METHOD FOR THE PRODUCTION OF A SHALE OIL PRODUCT HAVING IMPROVED CATALYTIC CRACKING PROPERTIES FROM SHALE OIL, WHICH METHOD COMPRISES: (1) INTIMATELY CONTACTING THE SHALE OIL WITH FROM ABOUT TWO TO ABOUT TEN STOICHIOMETRICAL PROPORTIONS OF FORMIC ACID FOR EACH ATOMIC PROPORTION OF NITROGEN PRESENT IN SAID SHALE OIL TO REDUCE THE NITROGEN CONTENT OF RESULTING RAFFINATE OIL PHASE TO A VALUE OF FROM ABOUT 0.4% TO ABOUT 0.9% BY WEIGHT; (2) SEPARATING RESULTING EXTRACT AND RAFFINATE PHASES; (3) RECOVERING DISSOLVED FORMIC ACID FROM THE SEPARATED RAFFINATE PHASE AND RETURNING IT FOR FURTHER EXTRACTION USE; AND (4) RECOVERING FORMIC ACID FROM THE SEPARATED EXTRACT PHASE BY DISTILLATION IN THE PRESENCE OF A LIGHT ESSENTIALLY NON-AROMATIC HYDROCARBON UNDER CONDITIONS TO MAINTAIN FORMIC ACID AND FORMATES IN THE DISTILLING ZONE A TEMPERATURE BELOW ABOUT 165% C. AND RETURNING THE RECOVERED FORMIC ACID FOR FURTHER EXTRACTION USE.
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) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |