Low structure carbon black and method of making same
AssigneeCabot Corporation
InventorsJames A. Belmont, Geoffrey D. Moeser, Andriy Korchev, Agathagelos Kyrlidis, Jeremy K. Huffman
Life of this patent
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Abstract
A carbon black having an I2 number from 30 mg/g to 200 mg/g and a DBP from 20 cc/100 g to 40 cc/100 g.
Claims20
A carbon black having an I2 number from 30 to 200 mg/g, a DBP from 20 cc/100 g to 40 cc/100 g, an M-ratio of from 1 to 1.23 and a total concentration of Group IA and IIA elements, in μg/g, of at most y+(15*I2 number), wherein y is 250.
A carbon black having an I2 number from 30 to 200 mg/g, a DBP from 20 cc/100 g to 40 cc/100 g, and an M-ratio from 1.00 to less than 1.23.
A carbon black having an I2 number from 30 to 200 mg/g, a DBP from 20 cc/100 g to 40 cc/100 g, a water spreading pressure of at most 6 mJ/m2, and an M-ratio from 1.00 to less than 1.23.
A carbon black having an I2 number from 70 to 200 mg/g, a DBP from 20 cc/100 g to 39 cc/100 g, and a water spreading pressure of at most 6 mJ/m2.
A process for producing a carbon black product having an M-ratio of from 1 to 1.23 and having an iodine number from 30 mg/g to 200 mg/g and a DBP from 20 cc/100 g to 40 cc/100 g, comprising:
- forming a stream of combustion gases by reacting a preheated air stream with a fuel;
- introducing feedstock into the stream of combustion gases at a predetermined number of points in an axial plane to form an effluent and start pyrolysis of the feedstock in the effluent;
- introducing an auxiliary hydrocarbon into the stream of combustion gases at the predetermined number of points in an axial plane, wherein the points of injection of the feedstock and the auxiliary hydrocarbon alternate in the axial plane;
- additionally introducing into the stream of combustion gases at least one substance containing at least one Group IA or Group IIA element or a combination thereof;
- and
- quenching the pyrolysis using water that has been subjected to reverse osmosis treatment,
- wherein the total of Group IA and IIA elements, in μg/g, in the carbon black product is at most y+15*I2 number, wherein y is 250.
Dependencies are inferred from the claim text.