Thank you everyone for your responses.
Here I try to collect the maximum information concerning the changes of the parameters which can be the cause of this loss in recovery of LPG, I find that the reflux temperature of the absorbing has been increased by approximately 1,5°C (from -61.41°C to 60°C) ... this problem must come from the deethanizer head condenser.
I have consulted the documents published by Ortloff LTD, and I have found that the rate of recovery of propane is directly related to the rate of compression as indicated on the diagram that I will attach as an attachment.
I would like someone to explain to me what the ratio of propane recovery to the compression ratio means and what compression ratio do they talk about in their publication?
I would like to ask you kindly to explain to me how this process works which is OHR, from which party we will recover the maximum of propane?
DCS image : https://drive.google...iew?usp=sharing
(propane recovery ratio %) / (HP/MMSCF) : https://drive.google...iew?usp=sharing