Abstract: Packing blockage in the upper part of gasoline fractionator (DA101) in ethylene plant led to higher final boiling point of pyrolysis gasoline, and heavy components were entrained to the separation system, resulting in a series of process and quality problems including the over high light components in propylene product, the over high C3 in C4 product, the over high C4 in C5 product and the darker color of C9 and C10 products. A series of measures were taken to ensure the safe and stable operation of the plant until the scheduled overhaul.

Key words: gasoline fractionator}blockage, product quality