Appeal No. 95-2741
Application 08/008,120
the skill of one of ordinary skill in the art.[9]
Representative claims 1 and 2 are and reproduced below:
Claim 1. A process for the producing carbon blacks comprising:
passing a stream of hot combustion gases through a reactor; injecting
feedstock into the stream of hot combustion gases at one or more
points to form an effluent and start pyrolysis of the feedstock in the
effluent; cooling the effluent after the formation of carbon blacks by
passing the effluent through a lined wall heat exchanger in order to stop
pyrolysis and obtain a resultant process stream of combustion gases
and carbon black; further cooling the process stream in a secondary
cooler without adding any cooling liquid to a temperature that prevents
damage to the means utilized for separating and collecting the carbon
black product; and separating and collecting carbon black product.
Claim 2. The process of claim 1 further comprising injecting a
quenching fluid into the effluent prior to its passing into the lined wall
heat exchanger wherein the quenching fluid is injected into the effluent at
a rate wherein all of the fluid is atomized to minimize the duration of the
presence of the quenching fluid in the liquid phase in the effluent stream.
B. The Austin patent
Austin describes a process for the production of carbon black. Carbon black is produced in a
reactor by contacting hydrocarbon with hot combustion gases to produce combustion products
containing particulate carbon black. The combustion products are cooled by injecting quench fluid10
into the combustion products to form effluent. The hydrocarbon combustion products temperature is11
9 Specification, page 5.
10 Austin, column 1, lines 7-11.
11 Austin, column 1, lines 17-19.
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