Back to results
US 6,548,036 B2Granted
Method for producing carbon black
AssigneeCabot Corporation
InventorsKatsu Iida, Mitsuyuki Sasaki, Makoto Takahashi, Ryoichi Adachi
Life of this patent
Estimating the term…
Abstract
A process for producing carbon blacks having lower surface area and structure wherein steam is introduced into the combustion gas stream at a point located a distance “L” from the point of introduction of feedstock into the combustion gas stream such that the ratio L/D ranges from 0 to less than 1.0, where “D” is the diameter of the zone of the reactor at the point of introduction of feedstock.
Claims16
A process for producing carbon black in a carbon black furnace reactor comprising:
- generating a combustion gas steam by reacting a fuel and an oxidant;
- introducing a carbon black-yielding feedstock into the combustion gas stream at a point located in a zone of the reactor having a diameter, D;
- introducing steam into the combustion gas stream in a first zone of the reactor having a first diameter and at a point located a distance, L, from the point of feedstock introduction such that the ratio of L/D ranges from 0 to less than 1.0, and in an amount such that, after allowing reaction of the feedstock, steam and combustion gas stream, carbon black is produced having a lower nitrogen specific surface area than carbon black made under the same conditions but in the absence of steam;
- reacting the feedstock, steam and combustion gas stream to form carbon black in a second lone of the reactor having a diameter that is greater than said first diameter;
- and
- cooling, separating and recovering the carbon black.
3 more elements
A process for producing carbon black in a carbon black furnace reactor comprising:
- generating a combustion gas stream by reacting a fuel and an oxidant;
- introducing a carbon black-yielding feedstock into the combustion gas stream at a point located in a transition zone of the reactor, said transition zone having a constant diameter, D;
- introducing steam into the combustion gas stream in the transition zone at a point located a distance, L, from the point of feedstock introduction such that the ratio of L/D ranges from 0 to less than 1.0, and in an amount such that, after allowing reaction of the feedstock, steam and combustion gas stream, carbon black is produced having a lower nitrogen specific surface area than carbon black made under the same conditions but in the absence of steam;
- reacting the feedstock, steam and combustion gas stream in a zone of the reactor having a diameter that is greater than the diameter of the transition zone;
- and
- cooling, separating and recovering the carbon black.
3 more elements
A process for producing carbon black in a carbon black furnace reactor comprising:
- generating a combustion gas stream by reacting a fuel and an oxidant;
- introducing a carbon black-yielding feedstock into the combustion gas stream at a point located in a zone of the reactor having a diameter, D;
- introducing steam into the combustion gas stream in a first zone of the reactor having a first diameter and at a point located a distance, L~ from the point of feedstock introduction such that the ratio of L/D is 0, and in an amount such that, after allowing reaction of the feedstock, steam and combustion gas stream, carbon black is produced having a lower nitrogen specific surface area than a carbon black made under the same conditions but in the absence of said steam;
- reacting the feedstock, steam and combustion gas stream to form carbon black in a second lone of the reactor having a diameter that is greater than said first diameter;
- and
- cooling, separating and recovering the carbon black.
3 more elements
A process for restraining an increase in the specific surface area of carbon black formed in a carbon black furnace reactor comprising:
- generating a combustion gas stream by reacting a fuel and an oxidant;
- introducing a carbon black-yielding feedstock into the combustion gas stream at a point located in a zone of the reactor having a diameter, D;
- introducing steam into the combustion gas stream in a first lone of the reactor having a first diameter and at a point located a distance, L, from the point of feedstock introduction such that the ratio of L/D ranges from 0 to less than 1.0, and in an amount such that, after allowing reaction of the feedstock, steam and combustion gas stream, carbon black is produced having a lower nitrogen specific surface area than a carbon black made under the same conditions but in the absence of steam;
- reacting the feedstock, steam and combustion gas stream to form carbon black in a second lone of the reactor having a diameter that is greater than said first diameter;
- and
- cooling, separating and recovering the carbon black.
3 more elements
A process for producing carbon black in a carbon black furnace reactor comprising:
- generating a combustion gas stream by reacting a fuel and an oxidant;
- introducing a carbon black-yielding feedstock into the combustion gas stream at a point located in a zone of the reactor having a diameter, D;
- introducing steam into the combustion gas stream at a point upstream of the point of feed stock introduction at a distance, L from the point of feedstock introduction such that the ratio of L/D ranges from 0 to less than 1.0;
- allowing reaction of the feedstock, steam and combustion gas stream to form carbon black;
- and
- cooling, separating and recovering the carbon black.
3 more elements
A process for producing carbon black in a carbon black furnace reactor comprising:
- generating a combustion gas stream by reacting a fuel and an oxidant;
- introducing a carbon black-yielding feedstock into the combustion gas stream at a point located in a transition zone of the reactor, said transition zone having a constant diameter, D;
- introducing steam into the combustion gas stream in the transition zone at a point located a distance, L, from the point of feedstock introduction such that the ratio of L/D is 0, and in an amount such that, after allowing reaction of the feedstock, steam and combustion gas stream, carbon black is produced having a lower nitrogen specific surface area than a carbon black made under the same conditions but in the absence of said steam;
- reacting the feedstock, steam and combustion gas stream to form carbon black in a second zone of the reactor having a diameter that is greater than the diameter of the transition zone;
- and
- cooling, separating and recovering the carbon black.
3 more elements
Dependencies are inferred from the claim text.