US4490346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing carbon black
Assignee: Phillips Petroleum Co
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Filing: 1982-07-12
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Granted: 1984-12-25
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Expires: 2002-07-12
Abstract
Abstract In the production of carbon black, low BTU content gases are combusted in a compact combustion zone with near stoichiometric amounts of oxidant gases, tempered to the desired temperature and volume with a diluent gas stream which can be selected from air and filter off-gases, and introduced into a reactor for the pyrolysis of a carbonceous feedstock to form carbon black.
Inventors
- 👤 Paul J. Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:37
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; B; B01; B01J; B01J19/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
133 words
A process for producing carbon black comprising: (a) combusting a fuel gas stream comprising at least 5 percent by volume of at least one of molecular hydrogen and carbon monoxide with an oxidant stream of molecular oxygen-containing gas to provide a combustion product stream then; (b) combining each standard part by volume of the combustion product stream with at least 0.1 standard parts by volume of a cooler diluent gas stream selected from air and reactor off-gas to provide a tempered combustion product stream having a temperature lower than the temperature of the combustion product stream and sufficiently high to decompose a carbonaceous feedstock and form carbon black; and then (c) injecting a carbonaceous feedstock into the tempered combustion product stream to form carbon black; and (d) collecting the carbon black thus produced.
Claim 2
Dependent Claim
133 words
A process for producing carbon black comprising: (a) combusting a fuel gas stream comprising at least 5 percent by volume of at least one of molecular hydrogen and carbon monoxide with an oxidant stream of molecular oxygen-containing gas to provide a combustion product stream then; (b) combining each standard part by volume of the combustion product stream with at least 0.1 standard parts by volume of a cooler diluent gas stream selected from air and reactor off-gas to provide a tempered combustion product stream having a temperature lower than the temperature of the combustion product stream and sufficiently high to decompose a carbonaceous feedstock and form carbon black; and then (c) injecting a carbonaceous feedstock into the tempered combustion product stream to form carbon black; and (d) collecting the carbon black thus produced.
Claim 3
Dependent Claim
26 words
A process as in claim 1 wherein the fuel gas stream has a heating value in the range of from about 40 to about 120 BTU/SCF.
Claim 4
Dependent Claim
22 words
A process as in claim 2 wherein the fuel gas stream is recovered from the gaseous effluent of a carbon black reactor.
Claim 5
Dependent Claim
33 words
A process as in claim 3 wherein the oxidant stream is combined with the fuel gas stream in an amount within 20 percent of the stoichiometric amount to combust the fuel gas stream.
Claim 6
Dependent Claim
66 words
A process as in claim 1 wherein the fuel gas stream is introduced generally axially into a first generally cylindrical zone and the oxidant stream is introduced generally tangentially into the first generally cylindrical zone, wherein the combustion product stream is introduced generally tangentially into a second generally cylindrical zone, and wherein the diluent gas stream is introduced generally tangentially into the second generally cylindrical zone.
Claim 7
Dependent Claim
72 words
A process as in claim 5 wherein the fuel gas stream is at a temperature within the range of 400°-1200° F., the oxidant gas stream is at a temperature within the range of 400°-1200° F., the combustion gas stream is at a temperature within the range of 2500°-3400° F., and the tempered combustion product stream is at a temperature lower than the combustion product stream and within the range of 2300°-3100° F.
Claim 8
Dependent Claim
32 words
A process as in claim 6 wherein each standard part by volume of the combustion product stream is combined with from about 0.2-0.8 standard parts by volume of the diluent gas stream.
Claim 9
Dependent Claim
30 words
A process as in claim 7 wherein each standard part by volume of the combustion product stream is combined with 0.3-0.7 standard parts by volume of the diluent 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) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |