US3248252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing acidic carbon black
Assignee: Phillips Petroleum Co
•
Filing: 1962-05-18
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Granted: 1966-04-26
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Expires: 1982-05-18
Abstract
No abstract record available.
Inventors
- 👤 Robert M Schirmer
- 👤 Marvin M Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:25
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/565; C09C1/50; C01; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A PROCESS FOR PRODUCING ACIDIC CARBON BLACK WHICH COMPRISES: CONTINUOUSLY SUPPLYING A HYDROCARBON REACTANT OF KNOWN SULFUR CONTENT TO A REACTION ZONE; CONTINUOUSLY INTRODUCING AT A CONTROLLED RATE INTO SAID REACTION ZONE A TOTAL AMOUNT OF SULFUR, INCLUDING THAT PREVIOUSLY PRESENT AND THAT ADDED TO SAID FEEDSTOCK, BETWEEN ABOUT 0.1 AND 3.0 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID HYDROCARBON SUPPLIED; HEATING SAID HYDROCARBON IN SAID REACTION ZONE TO PRODUCE CARBON BLACK; PARTIALLY QUENCHING THE REACTION PRODUCTS FROM SAID REACTION ZONE TO DISCONTINUE THE PRODUCTION OF SAID CARBON BLACK; PASSING SAID PARTIALLY QUENCHED REACTION PRODUCT INTO AN OXIDIZING ZONE; IN SAID OXIDIZING ZONE, CONTACTING SAID PARTIALLY QUENCHED REACTION PRODUCTS WITH AN OXYGEN-CONTAINING FLUID OXIDIZING AGENT WHEREBY THE PH OF THE PRODUCED CARBON BLACK IS REDUCED; AND FURTHER QUENCHING SAID REACTION PRODUCTS TO DISCONTINUE THE REACTION.
Claim 2
Dependent Claim
138 words
A PROCESS FOR PRODUCING ACIDIC CARBON BLACK WHICH COMPRISES: CONTINUOUSLY SUPPLYING A HYDROCARBON REACTANT OF KNOWN SULFUR CONTENT TO A REACTION ZONE; CONTINUOUSLY INTRODUCING AT A CONTROLLED RATE INTO SAID REACTION ZONE A TOTAL AMOUNT OF SULFUR, INCLUDING THAT PREVIOUSLY PRESENT AND THAT ADDED TO SAID FEEDSTOCK, BETWEEN ABOUT 0.1 AND 3.0 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID HYDROCARBON SUPPLIED; HEATING SAID HYDROCARBON IN SAID REACTION ZONE TO PRODUCE CARBON BLACK; PARTIALLY QUENCHING THE REACTION PRODUCTS FROM SAID REACTION ZONE TO DISCONTINUE THE PRODUCTION OF SAID CARBON BLACK; PASSING SAID PARTIALLY QUENCHED REACTION PRODUCT INTO AN OXIDIZING ZONE; IN SAID OXIDIZING ZONE, CONTACTING SAID PARTIALLY QUENCHED REACTION PRODUCTS WITH AN OXYGEN-CONTAINING FLUID OXIDIZING AGENT WHEREBY THE PH OF THE PRODUCED CARBON BLACK IS REDUCED; AND FURTHER QUENCHING SAID REACTION PRODUCTS TO DISCONTINUE THE REACTION.
References Cited (Backward Citations)
CA455047A
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US2682448A
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US2657117A
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US2631107A
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US2851337A
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GB848419A
Cited
US3009784A
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US2976128A
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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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |