Reactor and method for the production of carbon black with high surface activity

摘要

An axial flow carbon black reactor produces carbon black with a high surface activity. The exit chamber has a diameter which gradually increases towards the exit opening of the reactor so that the flow of hot gas and pyrolyzing feedstock hydrocarbon is a substantially plug flow through the exit chamber. This provides for a substantially uniform residence time and a reduced average residence time of the pyrolyzing feedstock hydrocarbon in the reactor. Accordingly, the feedstock hydrocarbon is not overpyrolyzed and the surface activity of the forming carbon black particles is preserved.