The operational problems brought by deterioration of ethylene material on plant operation applicability were analyzed,including regress of economic indexes as integrated energy consumption of ethylene,yield of diene,corrosion and breakout of welding line in cracking furnace tube,layer phenomenon in quenching oil,operation fluctuation of alkaline tower,and so on.

In this study, the effect of base oils characteristics on ATF performance is investigated, mainly regarding differences in frictional characteristics with deterioration.