US4282199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black process
Assignee: Degussa Engineered Carbons LP
•
Filing: 1980-02-25
•
Granted: 1981-08-04
•
Expires: 2000-02-25
Abstract
Abstract The tail gas generated by the carbon black process can be used as a source of fuel for drying carbon black without adversely affecting the product properties of the end product if the dried carbon black is heat treated using a fuel free of sulfur and nitrogen compounds.
Inventors
- 👤 Trevor G. Lamond
- 👤 Peter Aboytes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:36
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C01; C01P; C01P2006/00; C01P2006/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
In a method of using the tail gas generated by the production of carbon black comprising: (a) producing carbon black and tail gas by the decomposition of a hydrocarbon feedstock; (b) filtering said tail gas from said carbon black; (c) dehumidifying said filtered tail gas; and (d) using said dehumidified tail gas as a fuel in a drying means to dry said carbon black; the improvement comprising heat treating said carbon black in a heat treatment means, wherein said heat treatment means uses as a fuel, a fuel free of sulfur and nitrogen compounds; and wherein said heat treatment means operates at a higher temperature than the drying means.
Claim 2
Dependent Claim
109 words
In a method of using the tail gas generated by the production of carbon black comprising: (a) producing carbon black and tail gas by the decomposition of a hydrocarbon feedstock; (b) filtering said tail gas from said carbon black; (c) dehumidifying said filtered tail gas; and (d) using said dehumidified tail gas as a fuel in a drying means to dry said carbon black; the improvement comprising heat treating said carbon black in a heat treatment means, wherein said heat treatment means uses as a fuel, a fuel free of sulfur and nitrogen compounds; and wherein said heat treatment means operates at a higher temperature than the drying means.
Claim 3
Dependent Claim
22 words
A method according to claim 1 wherein said heat treatment means operates at a temperature of between 175 and 350 degrees Celsius.
Claim 4
Dependent Claim
20 words
A method according to claim 2 wherein said heat treatment means operates at a temperature of about 260 degrees Celsius.
Claim 5
Dependent Claim
15 words
A method according to claim 1 wherein said heat treatment means is a fluidized bed.
Claim 6
Dependent Claim
19 words
A method according to claim 1 wherein natural gas is used as the fuel for the heat treatment means.
Claim 7
Independent Claim
217 words
A method of using the tail gas generated by the production of carbon black comprising: (a) producing carbon black and tail gas by the decomposition of a hydrocarbon feedstock; (b) passing said carbon black and said tail gas into a filter; (c) filtering said tail gas from said carbon black in said filter; (d) passing said tail gas from said filter to a dehumidifier; (e) cooling said tail gas in said dehumidifier to a temperature of below 60 degrees Celsius by spraying water onto said tail gas to reduce the moisture content of said tail gas to less than 1%; (f) passing said tail gas from said dehumidifier to a rotary dryer; (g) passing said carbon black from said filter to a pinmixer; (h) forming carbon black pellets in said pinmixer; (i) passing said carbon black pellets to said rotary dryer; (j) using said tail gas as a fuel in said rotary dryer to dry said carbon black pellets to a temperature of about 125 degrees Celsius; (k) passing said carbon black pellets from said rotary dryer to a natural gas fired fluidized bed; (l) heat treating said carbon black pellets in said fluidized bed at a temperature of about 260 degrees Celsius for about 20 minutes; and, (m) removing said carbon black from said fluidized bed.
Claim 8
Independent Claim
217 words
A method of using the tail gas generated by the production of carbon black comprising: (a) producing carbon black and tail gas by the decomposition of a hydrocarbon feedstock; (b) passing said carbon black and said tail gas into a filter; (c) filtering said tail gas from said carbon black in said filter; (d) passing said tail gas from said filter to a dehumidifier; (e) cooling said tail gas in said dehumidifier to a temperature of below 60 degrees Celsius by spraying water onto said tail gas to reduce the moisture content of said tail gas to less than 1%; (f) passing said tail gas from said dehumidifier to a rotary dryer; (g) passing said carbon black from said filter to a pinmixer; (h) forming carbon black pellets in said pinmixer; (i) passing said carbon black pellets to said rotary dryer; (j) using said tail gas as a fuel in said rotary dryer to dry said carbon black pellets to a temperature of about 125 degrees Celsius; (k) passing said carbon black pellets from said rotary dryer to a natural gas fired fluidized bed; (l) heat treating said carbon black pellets in said fluidized bed at a temperature of about 260 degrees Celsius for about 20 minutes; and, (m) removing said carbon black from said fluidized bed.
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) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |