Claims
- 1. A method for producing carbon black having a tint residual of about -6 or less, said method comprising:
- (a) axially passing feedstock into a cylindrical precombustion section of a carbon black reactor while generating a vortex of hot combustion gas in said precombustion section to produce a first mixture of feedstock and combustion gas;
- (b) passing said first mixture axially from said precombustion section through an abruptly restricted passage;
- (c) abruptly expanding said first mixture;
- (d) converging the axially flowing mixture;
- (e) mixing said converging first mixture with radial, opposite flow of combustion gas to form a second mixture; and
- (f) in a confined reaction section producing carbon black from said second mixture.
- 2. A method of claim 1 wherein radial, opposite flow of combustion gas is substantially equal in volume.
- 3. A method of claim 1 wherein said mixing of converging first mixture with radial, opposite flow of combustion gas occurs as the converging mixture is near the inlet of the confined reaction zone.
Parent Case Info
This application is a division of copending application Ser. No. 718,301, filed Aug. 27, 1976, now allowed, U.S. Pat. No. 4,127,387.
US Referenced Citations (3)
Divisions (1)
|
Number |
Date |
Country |
Parent |
718301 |
Aug 1976 |
|