Pyrolysis Processes in the Presence of Oxygen

2 Pyrolysis Processes in the Presence of Oxygen Furnace Black Process 

Furnace black processes currently account for more than 95% of the carbon black manufactured. A great advantage of such processes is their flexibility in producing different carbon black types, types with primary particle sizes between 10 and 80 nm being producible. 

The first process of this type utilized gases as raw materials and produced carbon blacks for rubber with only moderate reinforcement properties at a maximum yield of 30%. The changeover to liquid and melting raw materials increased the yield of carbon black for rubber to 40 to 70% and enabled a much broader range of raw of products to be produced, so that this type of raw material is now almost exclusively used e.g. aromatic compound-rich viscous residues from oil refineries, coking plants, catalytic crackers and steam crackers for the production of ethene and from the catalytic synthesis of petrol. 

Furnace black proce.sse.s now the mo.st flexible and important processes, 95% of carbon black manufactured using these processes 

High pyrolysis temperatures and short residence times in very finely divided carbon black with large specific surface areas 

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