Tandem quench
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United States of America Patent
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Mar 9, 1999
Issued Date -
N/A
app pub date -
Mar 25, 1996
filing date -
Apr 6, 1989
priority date (Note) -
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Abstract
A method for increasing the aggregate size and structure of carbon blacks produced by a furnace carbon black reactor by lowering the temperature of, but not stopping pyrolysis in, the effluent (the mixture of combustion gases and feedstock in which pyrolysis is occurring), preferably up to about 800 degrees F., at a residence time between about 0.0 second and about 0.002 second downstream from the furthest downstream point of injection of feedstock.
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