Appeal No. 1996-1158
Application No. 08/077,599
In accordance with a first
embodiment of this invention
therefore, a process for
producing carbon black of low
tint residue is provided. In
this process, a first flow of hot
combustion gases formed by the
combustion of a first fuel stream
and a first oxygen containing
stream is established in a first
carbon black forming zone. Into
this first carbon black forming
zone and into admixture with the
first hot combustion gases a
first stream of hydrocarbon
feedstock is introduced.
Thereby, a first carbon black
forming mixture is generated in
which at least a portion fo [sic,
of] the first stream of
hydrocarbon feedstock is
converted to carbon black. This
first carbon black forming
mixture is passed from the first
carbon black forming zone under
carbon black formation conditions
into a second carbon black
forming zone of the furnace used.
This second carbon black forming
zone is in an open connection and
fluid communication with the
first carbon black forming zone.
A second flow of hot combustion
gases formed by the combustion of
a second fuel stream and a second
oxygen containing stream is
established in the second carbon
black forming zone. A second
stream of hydrocarbon feedstock
is introduced into the second
carbon black forming zone of the
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