Abstract: In the actual operation of the Megaton ethylene plant in Dushanzi, the cracking feedstock is diversified, the impurities are complicated and the switchover of feedstock is frequent. In order to improve the yields of ethylene and propylene, a series of operational change and technological transformation are put forward through the comparative analysis of feedstock to adapt to the processing of different feedstock, so as to maximize the benefit.

Key words: cracking feedstock, diversity, operational change