Process for producing carbon black

Details Process for producing carbon black Process for producing carbon black

C - Chemistry, Metallurgy

09

C

23/307

C09C 1/50 (2006.01)

Patent

CA 1336475

The invention relates to an improved process for producing furnace carbon blacks wherein a fuel and an oxidant are reacted so as to provide a stream of hot primary combustion gases possessing sufficient energy to convert a carbon black yielding liquid hydrocarbon feedstock to carbon black, and wherein liquid hydrocarbon feedstock is peripherally injected, in the form of a plurality of non- preatomized coherent streams or preatomized streams, into the stream of gaseous combustion products at a point where the combustion gas stream has reached maximum velocity in a direction substantially transverse to the direction of flow of the stream of combustion gases and under sufficient pressure to achieve a degree of penetration required for proper shearing and mixing of the feedstock. The feedstock is decomposed and converted into carbon black prior to termination of the carbon forming reaction by quenching, and then cooling, separating and recovering the resultant carbon black. According to the invention, a sufficient portion of the total amount of liquid hydrocarbon feedstock is introduced into the combustion gas stream prior to the point at which the stream of combustion gases reaches maximum velocity and at a point upstream of which no further increase of the CDBP of the resultant carbon black caused by injecting feedstock into the hot combustion gas stream prior to the point at which the combustion gas stream has reached maximum velocity is observed to thereby produce carbon blacks having wider aggregate size distribution. The process of the invention enables one to produce carbon blacks having wider aggregate size distribution.

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