Appeal No. 1996-1158
Application No. 08/077,599
furnace and into admixture with
the second flow of hot combustion
gases established therein as well
as with the first carbon black
forming mixture coming from the
first carbon black forming zone
of the furnace. The operating
parameters in the first and
second carbon black forming zones
are such that in one of the
carbon black forming zones which
is a high structure zone there is
formed a high structure carbon
black, whereas in the other of
the carbon black forming zones
which is a low structure zone
there is formed a low structure
carbon black. In the second
carbon black forming zone of the
furnace a second carbon black
forming mixture is generated
which is passed from this second
carbon black forming zone under
carbon black forming conditions
into a quench zone. In this
quench zone the second carbon
black forming mixture (which
contains the mass from the first
carbon black forming zone) is
contacted with a quench fluid to
produce a carbon black containing
smoke at a temperature of below
carbon black formation
conditions. Finally, the carbon
black of low tint residue is
separated from the smoke as the
product of the process. Emphasis
added.
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