Patent US3922335A successfully refreshed from Google Patents.
US3922335A
Expired / Lapsed
US
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Process for producing carbon black
Assignee: Cabot Corp
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Filing: 1974-02-25
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Granted: 1975-11-25
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Expires: 1994-02-25
Abstract
Abstract There is disclosed herein a process for the production of oil furnace carbon blacks, which process is characterized by exceptionally high throughput, efficient use of heat, facile scale-up, high yields and the ability to produce high quality novel and desirable carbon blacks. The process involves the use of a staged reaction system whereby there is provided, seriatim, a combustion zone, a feedstock injection zone and a carbon forming zone.
Inventors
- 👤 Merrill E Jordan
- 👤 Allan C Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:11
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/24; C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; F23D17/00; C01; C01P; C01P2006/00; C01P2006/19
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
A PROCESS FOR PRODUCING CARBON BLACK WHICH COMPRISES: ESTABLISHING AN ENCLOSED STREAM OF HOT COMBUSTION GASES HAVING A LINEAR VELOCITY SUFFICIENT TO ATOMIZE AND TO DISPERSE LIQUID CARBON FROMING FEEDSTOCK; INJECTING LIQUID FEEDSTOCK IN THE FORM OF A PLURALITY OF INDIVIDUAL COHERENT STREAM FROM THE EXTERI TRANSVERSELY INTO THE COMBUSTION GAS STREAM FROM THE EXTERIOR PERIPHERY THEREOF; INJECTING LIQUID FEEDSTOCK IN THE FORM OF A PLURALITY OF INDIVIDUAL COHERENT STREAMS OUTWARDLY AND SUBSTANTIALLY TRANSVERSELY INTO THE COMBUSTION GAS STREAM FROM AT LEST ONE LOCATION IN THE INTERIOR THEREOF; EACH OF THE COHERENT STREAM OF FEEDSTOCK BEING CAUSED TO PENETRATE THE COMBUSTION GAS STREAM TO A DEPTH SUFFICIENT TO AVOID SIGNIFICANT CONTACT OF THE FEEDSTOCK WITH APARATUS PRIOR TO MIXING THEREOF WITH THE HOT COMBUSTION GAS STREAM AND FORMING SOLID CARBON PARTICLES; QUENCHING THE REACTION MIXTURE AND COLLECTING CARBON BLACK PRODUCT.
Claim 2
Dependent Claim
140 words
A PROCESS FOR PRODUCING CARBON BLACK WHICH COMPRISES: ESTABLISHING AN ENCLOSED STREAM OF HOT COMBUSTION GASES HAVING A LINEAR VELOCITY SUFFICIENT TO ATOMIZE AND TO DISPERSE LIQUID CARBON FROMING FEEDSTOCK; INJECTING LIQUID FEEDSTOCK IN THE FORM OF A PLURALITY OF INDIVIDUAL COHERENT STREAM FROM THE EXTERI TRANSVERSELY INTO THE COMBUSTION GAS STREAM FROM THE EXTERIOR PERIPHERY THEREOF; INJECTING LIQUID FEEDSTOCK IN THE FORM OF A PLURALITY OF INDIVIDUAL COHERENT STREAMS OUTWARDLY AND SUBSTANTIALLY TRANSVERSELY INTO THE COMBUSTION GAS STREAM FROM AT LEST ONE LOCATION IN THE INTERIOR THEREOF; EACH OF THE COHERENT STREAM OF FEEDSTOCK BEING CAUSED TO PENETRATE THE COMBUSTION GAS STREAM TO A DEPTH SUFFICIENT TO AVOID SIGNIFICANT CONTACT OF THE FEEDSTOCK WITH APARATUS PRIOR TO MIXING THEREOF WITH THE HOT COMBUSTION GAS STREAM AND FORMING SOLID CARBON PARTICLES; QUENCHING THE REACTION MIXTURE AND COLLECTING CARBON BLACK PRODUCT.
Claim 3
Dependent Claim
35 words
The process of claim 1 wherein each of the coherent streams of feedstock is caused to penetrate into the combustion gas stream to a depth of between 15 and 50% of the cross-sectional dimension thereof.
Claim 4
Dependent Claim
29 words
The process of claim 1 wherein the velocity of the combustion gas stream at the loci of the injections of the liquid feedstock thereinto is at least Mach 0.35.
Claim 5
Dependent Claim
31 words
The process of claim 1 wherein the velocity of the combustion gas stream at the loci of the injections of the liquid feedstock thereinto is between Mach 0.4 and Mach 0.8.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein the injections of the liquid feedstock are substantially coplanar.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein the combustion gas stream has an essentially circular cross-section.
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein the combustion gas stream has an essentially rectangular cross-section.
Claim 9
Dependent Claim
29 words
The process of claim 1 wherein the injection of liquid feedstock outwardly and substantially transversely occurs from a plurality of locations across the cross-section of the combustion gas stream.
Claim 10
Dependent Claim
33 words
The process of claim 1 wherein each coherent stream of the substantially transverse outward injection is projected towards a point intermediate adjacent feedstock streams injected from the exterior periphery of the gas stream.
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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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |