PROCESS AND APPARATUS FOR THE MANUFACTURE OF CARBON BLACKS HAVING IMPROVED DISPERSION AND PLATEWEAR CHARACTERISTICS

摘要

A reaction mixture is formed of a feedstock hydrocarbon and hot combustion gases, the mixture having a composition and sufficient heat content for formation of a carbon black of specific particle size and structure characteristics upon decomposition of the hydrocarbon within the mixture. Before the carbon black is completely formed, the mixture is diluted with a gas which is substantially nonreactive with the carbon black and cooler than the mixture. Agglomeration of the particles of carbon black within the mixture is reduced, and the resultant dispersion and platewear characteristics of the carbon black in printing inks are greatly improved.