Technology Unit

Separating all C₂ and lighter components from propylene and heavier components.
C₃ absorber  is operated at full cracked gas pressure above 35 bar.
The de-ethanizer column operates at reduced pressure with a lower bottom temperature around 80 °C.

Source: Y.A. Sastry & Uday Krishna Dy, DUAL FEED CRACKER UNIT & ASSOCIATED UNIT, ONGC Petro additions Limited (OPaL), Uploaded on 28^th Jan 2018 on SCRIBD.