Process for producing carbon black and apparatus therefor

Claim 1

A cylindrical reactor for producing carbon black, comprising: a) a combustion chamber for forming a combustion gas stream, the combustion chamber having a diameter and an axis and including a combustion burner disposed on the axis of the combustion chamber for burning fuel oil and a duct disposed tangential to the combustion chamber for introducing combustion air into the combustion chamber; b) a reaction chamber downstream from, and connected to the combustion chamber and having an axis coaxial with the axis of the combustion chamber, whereby the combustion gas stream flows into the reaction chamber to form a reaction gas stream, the reaction chamber comprising a throat having a larger diameter tapering to a smaller diameter at a downstream end, the larger diameter of the throat being smaller that the diameter of the combustion chamber, and an extension coaxial with and connected to the downstream end of the throat, the extension having an inner surface and a diameter the same as the smaller diameter of the throat; c) a plurality of ribs arranged on the inner surface of the extension to form a plurality of slits defined between adjacent ribs; d) a means for introducing feedstock perpendicular to the axis of the reaction chamber into the combustion gas stream; and e) a cooling chamber downstream from, coaxial with, and connected to the extension, the cooling chamber including a means for quenching the reaction gas stream and an outlet.