Millisecond furnace
Encyclopedia
A Millisecond furnace is a device used for cracking
Cracking
Cracking may refer to:* Cracking, the formation of a fracture or partial fracture in a solid material* Fluid catalytic cracking, a catalytic process widely used in oil refineries for cracking large hydrocarbon molecules into smaller molecules...

 naphtha into ethylene, by extremely short (50 to 100 millisecond) exposure to temperatures of about 900 degrees Celsius, followed by a rapid quenching below 750 degrees Celsius.

They were developed by M W Kellogg in the 1970s.
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