Ethylene by Steam Cracking of Naphtha

Ethylene, the most-made organic chemical, comes from cracking hydrocarbons with steam. Naphtha mixed with steam passes through furnace tubes at around 850 °C for milliseconds and is quenched at once. The cracked gas is compressed in three stages and separated by cryogenic distillation into ethylene, propylene and the rest. The picture: our diagram of furnace, quench, compressor and cold column.