METHOD OF PRODUCING CARBON BLACK Russian patent published in 1998 - IPC

FIELD: carbon products. SUBSTANCE: narrowed oxidant-fuel mixture stream (ratio on the stream axis before inflammation is 0.75-0,95 its stoichiometric magnitude at average magnitude of coefficient of oxidant excess 1.2-1.8) is introduced into combustion zone while simultaneously being expanded and inflamed. Into combustion product stream, hydrocarbon raw material is introduced radially 10^-35•10^-3 s after mixture inflammation. The stream is expanded once more or narrowed and then expanded, while simultaneously undergoing thermal decomposition to form carbon black and gas products, after which, product is quenched by injecting water and directed into recovery system to isolate final product. Yield of medium-size carbon black is 77-82%, iodine number 43-71 ml/100 g, and specific surface 44-72 sq.m/g. Yield of fine carbon black is 50.5-60.3%, specific surface 113 sq.m/g, and iodine number 118 ml/100 g. EFFECT: Improved characteristics of product. 2 dwg , 2 tbl