US3915653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of carbon black
Assignee: Phillips Petroleum Co
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Filing: 1974-07-08
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Granted: 1975-10-28
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Expires: 1994-07-08
Abstract
Abstract Carbon black is produced in a reactor which comprises a generally cylindrical combustion section followed by a reaction section. Hydrocarbon feed is introduced axially into the combustion section, and combustion gases are introduced into the combustion section in a direction generally tangential to the outer wall. One or both of the end walls of the combustion section slope inwardly.
Inventors
- 👤 Paul J Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:02
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2006/00; C01P2006/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
142 words
A FURNACE ADAPTED TO BE USED IN THE PRODUCTION OF CARBON BLACK COMPRISING: A REACTION SECTION OF GENERALLY CIRCULAR CROSS SECTION, A COMBUSTION SECTION POSITIONED UPSTREAM OF AND COAXIAL WITH SAID REACTION SECTION, SAID COMBUSTION SECTION BEING PROVIDED WITH AN OUTER GENERALLY CYLINDRICAL WALL OF DIAMETER GREATER THEN THE DIAMETER OF THE INLET OF SAID REACTION SECTION, AN UPSTREAM WALL AND A DOWNSTREAM WALL, SAID DOWNSTREAM WALL SLOPING INWARDLY FROM SAID OUTER WALL AT AN ANGLE IN THE RANGE OF ABOUT 45* TO ABOUT 85* WITH RESPECT TO SAID OUTER WALL AND TOWARD SAID UPSTREAM WALL, MEANS TO INTRODUCE A FEED OIL INTO SAID COMBUSTION SECTION GENERALLY ALONG THE AXIS THEREOF AND IN A DIRECTION TOWARD SAID REACTION SECTION, AND MEANS TO INTRODUCE COMBUSTION GASES INTO SAID COMBUSTION SECTION IN A DIRECTION GENERALLY TANGENTIAL TO THE OUTER WALL OF SAID COMBUSTION SECTION.
Claim 2
Dependent Claim
142 words
A FURNACE ADAPTED TO BE USED IN THE PRODUCTION OF CARBON BLACK COMPRISING: A REACTION SECTION OF GENERALLY CIRCULAR CROSS SECTION, A COMBUSTION SECTION POSITIONED UPSTREAM OF AND COAXIAL WITH SAID REACTION SECTION, SAID COMBUSTION SECTION BEING PROVIDED WITH AN OUTER GENERALLY CYLINDRICAL WALL OF DIAMETER GREATER THEN THE DIAMETER OF THE INLET OF SAID REACTION SECTION, AN UPSTREAM WALL AND A DOWNSTREAM WALL, SAID DOWNSTREAM WALL SLOPING INWARDLY FROM SAID OUTER WALL AT AN ANGLE IN THE RANGE OF ABOUT 45* TO ABOUT 85* WITH RESPECT TO SAID OUTER WALL AND TOWARD SAID UPSTREAM WALL, MEANS TO INTRODUCE A FEED OIL INTO SAID COMBUSTION SECTION GENERALLY ALONG THE AXIS THEREOF AND IN A DIRECTION TOWARD SAID REACTION SECTION, AND MEANS TO INTRODUCE COMBUSTION GASES INTO SAID COMBUSTION SECTION IN A DIRECTION GENERALLY TANGENTIAL TO THE OUTER WALL OF SAID COMBUSTION SECTION.
Claim 3
Dependent Claim
20 words
The furnace of claim 1 wherein the upstream wall of said combustion section is substantially perpendicular to said outer wall.
Claim 4
Dependent Claim
17 words
The furnace of claim 2 wherein said downstream wall slopes inwardly at an angle of about 63.5*.
Claim 5
Dependent Claim
18 words
The furnace of claim 3 wherein said reaction section is provided with a venturi adjacent said combustion section.
Claim 6
Dependent Claim
23 words
The furnace of claim 1 wherein said upstream wall slopes inwardly from said outer wall at an angle of up to about 45*.
Claim 7
Dependent Claim
30 words
The furnace of claim 1 wherein said means to introduce said oil is positioned to introduce the feed oil at a location adjacent the upstream wall of said combustion section.
Claim 8
Dependent Claim
29 words
The furnace of claim 1 wherein said means to introduce a feed oil is positioned to introduce the feed oil within said combustion section downstream from said upstream wall.
Claim 9
Dependent Claim
18 words
The furnace of claim 1 wherein said reaction section is provided with a venturi adjacent said combustion section.
Claim 10
Dependent Claim
18 words
The furnace of claim 8 wherein said venturi is provided with a cylindrical section at the throat thereof.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |