Patent ID: 6348181
Filing Date: 2002-02-19
Classification: C01P,C09C

Abstract:
A process for producing carbon black comprising:(a) forming a combustion gas stream by reacting a fuel with a first oxidant; (b) reacting a first carbon black yielding feedstock with the combustion gas stream to form a reaction stream containing a first carbon black; (c) reacting the reaction stream of step (b), downstream, with a second oxidant and a second carbon black yielding feedstock to produce additional carbon black; (d) carrying out the process of steps (a), (b), and (c) so that the amount of fuel utilized per pound of carbon black produced by the process of steps (a), (b), and (c) is less than the fuel utilized per pound of carbon black to form the first carbon black produced by the process of steps (a) and (b); (e) cooling, separating and recovering the carbon black formed by the process of steps (a) through (d), and further comprising introducing additional oxidant and additional carbon black yielding feedstock to produce additional carbon black prior to cooling, separating and recovering the carbon black.