If you read @Photon_noir’s thesis, that is not the claim.
If you think the claim is the amines are newly in use (e.g. have not been used in the crude refining industry prior) , I recommend you reread the entire “It’s not Isobutane” thread.
I’d also recommend reading @SafeLeaf.ca 's detailed explanation of how crude fractionation → butane happens, along with a few handy flow maps that show how sour gas is treated.
Let’s summarize
Fun flow diagram:
Amine Carryover aka Issues in the Stripper
In the Stripper, the equilibrium value for Ammonia from source feed into the Condenser is considerably < 1, causing Ammonia vaporized in the Stripper to be returned into the Reflux. The equilibrium value for Ammonia within the Stripper is a bit > 1, resulting in a mild tendency to exit the Stripper overhead rather than the bottom. So the Ammonia concentrations tend to build up in the Stripper as more Ammonia tries to exit the top, which causes it to be collected and returned into the Reflux again.
