A method for producing carbon black using an extender fluid

The invention is directed to methods for the production of carbon black using an extender fluid(s), as well as to methods to control one or more particle properties of carbon black utilizing extender fluids and other techniques. In particular, the invention provides a method for producing carbon black comprising: introducing a heated gas stream into a carbon black reactor; supplying at least one carbon black feedstock to at least one feedstock introduction point to the carbon black reactor; supplying at least one extender fluid to at least one introduction point to the carbon black reactor wherein the at least one introduction point for the extender fluid is located such that the at least one extender fluid increases the momentum of the at least one carbon black feedstock as the carbon black feedstock impacts the heated gas stream; combining said at least one carbon black feedstock and said at least one extender fluid, with the heated gas stream to form a reaction stream in which carbon black is formed in said carbon black reactor; and recovering the carbon black in the reaction stream.