US3112181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of graphite from petroleum
Assignee: Shell USA Inc
•
Filing: 1959-05-07
•
Granted: 1963-11-26
•
Expires: 1979-05-07
Abstract
No abstract record available.
Inventors
- 👤 Gunnar G Petersen
- 👤 Jacobus J Verstappen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:55
CPC Classifications
C; C10; C10B; C10B55/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A METHOD FOR PRODUCING GRAPHITE SUITABLE FOR USE AS A MODERATOR IN A NUCLEAR REACTOR WHICH COMPRISES ISOLATING A PETROLEUM DISTILLATE OF THE GROUP CONSISTING OF STRAIGHT-RUN DISTILLATES BOILING BETWEEN 200 AND 600*C. AND CATALYTICALLY CRACKED RECYCLE OILS BOILING BETWEEN 200 AND 500*C., HEATING SAID DISTILLATE WITH AN OXYGEN-CONTAINING GAS UNTIL OXYGENATED PRODUCT SO OBTAINED HAS A POUR POINT ABOVE ABOUT 50*C., COKING THE OXYGENATED PRODUCT IN A COKING ZONE UNDER THERMAL CRACKING AND COKING CONDITIONS WHEREBY COKE YIELDS MORE THAN ABOUT THREE TIMES AS GREAT ARE OBTAINED THAN IF WHEN THE OXYGEN TREATMENT IS OMITTED, SAID COKE BEING SUBSTANTIALLY FREE FROM METALS, CALCINING SAID COKE AT TEMPERATURES BETWEEN 1100 AND 1400*C., COMBINING THE CALCINED COKE WITH A BINDER HAVING A CARBON-TO-HYDROGEN ATOMIC RATIO BETWEEN ABOUT 1.5 AND ABOUT 1.8, AND GRAPHITIZING THE MIXTURE OF COKE AND BINDER AT 2500-3000*C., FOR 2-5 DAYS, WHEREBY GRAPHITE PRODUCT SUITABLE FOR USE AS A MODERATOR IN A NUCLEAR REACTOR IS OBTAINED.
Claim 2
Independent Claim
158 words
A METHOD FOR PRODUCING GRAPHITE SUITABLE FOR USE AS A MODERATOR IN A NUCLEAR REACTOR WHICH COMPRISES ISOLATING A PETROLEUM DISTILLATE OF THE GROUP CONSISTING OF STRAIGHT-RUN DISTILLATES BOILING BETWEEN 200 AND 600*C. AND CATALYTICALLY CRACKED RECYCLE OILS BOILING BETWEEN 200 AND 500*C., HEATING SAID DISTILLATE WITH AN OXYGEN-CONTAINING GAS UNTIL OXYGENATED PRODUCT SO OBTAINED HAS A POUR POINT ABOVE ABOUT 50*C., COKING THE OXYGENATED PRODUCT IN A COKING ZONE UNDER THERMAL CRACKING AND COKING CONDITIONS WHEREBY COKE YIELDS MORE THAN ABOUT THREE TIMES AS GREAT ARE OBTAINED THAN IF WHEN THE OXYGEN TREATMENT IS OMITTED, SAID COKE BEING SUBSTANTIALLY FREE FROM METALS, CALCINING SAID COKE AT TEMPERATURES BETWEEN 1100 AND 1400*C., COMBINING THE CALCINED COKE WITH A BINDER HAVING A CARBON-TO-HYDROGEN ATOMIC RATIO BETWEEN ABOUT 1.5 AND ABOUT 1.8, AND GRAPHITIZING THE MIXTURE OF COKE AND BINDER AT 2500-3000*C., FOR 2-5 DAYS, WHEREBY GRAPHITE PRODUCT SUITABLE FOR USE AS A MODERATOR IN A NUCLEAR REACTOR IS OBTAINED.
References Cited (Backward Citations)
US2244636A
Cited
US2347805A
Cited
US2587703A
Cited
US2775549A
Cited
US2913395A
Cited
US2905615A
Cited
US2922755A
Cited
US2959535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |