US3922335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing carbon black
Assignee: Cabot Corp
•
Filing: 1974-02-25
•
Granted: 1975-11-25
•
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 17:33
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.
References Cited (Backward Citations)
US2781247A
Cited
US3046096A
Cited
US3565586A
Cited
US3619140A
Cited
US3595618A
Cited
US3567395A
Cited
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 |