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US 6,485,693 B1Granted
Apparatus for producing carbon blacks
AssigneeCabot Corporation
InventorAllan C. Morgan
Life of this patent
Estimating the term…
Abstract
A process for producing carbon black comprising reacting a reaction stream formed by a prior carbon black forming process with an oxidant and a carbon black yielding feedstock to produce carbon black and cooling, separating and recovering the carbon black. The process advantageously reduces the amount of fuel needed to produce carbon black. Also disclosed is an apparatus for practicing the process.
Claims13
An apparatus for producing carbon black in a carbon black furnace reactor comprising:
- means for reacting a fuel and an oxidant in a first zone of the reactor to form a first combustion gas stream;
- means for introducing a carbon black-yielding feedstock into the first combustion gas stream in a second zone of the reactor, downstream of the first zone, to form a reaction stream;
- means for allowing formation of carbon black in the reaction stream to continue in a third zone of the reactor, downstream from the second zone;
- means for reacting oxidant with the reaction stream, in a fourth zone of the reactor, downstream of the third zone, to generate a second combustion gas stream which reacts with an additional carbon black-yielding feedstock;
- means for reacting carbon black-yielding feedstock with the second combustion gas stream in a fifth zone of the reactor, downstream of the fourth zone, under conditions wherein amount of fuel utilized, per pound of carbon black, is less than amount of fuel per pound of carbon black utilized to produce a carbon black of not less than substantially the same CTAB surface area by the means which formed the reaction stream;
- and
- means for cooling the carbon black in a sixth zone of the reactor, downstream of the fifth zone, and separating and recovering the carbon black in a seventh zone, downstream of the sixth zone;
- wherein, the second zone of the reactor has a diameter smaller than the first and third zones of the reactor, and the fifth zone of the reactor has a diameter smaller than the fourth and sixth zones of the reactor.
5 more elements
An apparatus for producing carbon black comprising:
- a combustion zone having an upstream and downstream end;
- means for reacting a fuel and an oxidant in the combustion zone to form a combustion gas stream;
- a first feedstock introduction zone having upstream and downstream ends, the upstream end of the first feedstock introduction zone being connected to the downstream end of the combustion zone;
- means for introducing carbon black-yielding feedstock into the first feedstock introduction zone;
- a first reaction zone having upstream and downstream ends, the upstream end of the first reaction zone being connected to the downstream end of the first feedstock introduction zone;
- an oxidant introduction zone having upstream and downstream ends, the upstream end of the oxidant introduction zone being connected to the downstream end of the first reaction zone;
- means for introducing an oxidant into the oxidant introduction zone;
- a second feedstock introduction zone having upstream and downstream ends, the upstream end of the second feedstock introduction zone being connected to the downstream end of the oxidant introduction zone;
- means for introducing a carbon black-yielding feedstock into the second feedstock introduction zone;
- a second reaction zone having upstream and downstream ends, the upstream end of the second reaction zone being connected to the downstream end of the second feedstock introduction zone;
- a quench zone having upstream and downstream ends, the upstream end of the quench zone being connected to the downstream end of the second reaction zone;
- means for introducing a quench fluid into the quench zone;
- means for separating and collecting carbon black connected to the downstream end of the quench zone, wherein
- the oxidant introduction zone has a diameter smaller than diameter of the first reaction zone.
11 more elements
Dependencies are inferred from the claim text.