Measurement and prediction of phase equilibria in the extraction of aromatics from naphtha reformate by tetraethylene glycol

The extraction of aromatics from naphtha reformate was carried out by the solvent tetraethylene glycol at six temperatures and three solvent to feed ratios. The concentrations of paraffins, naphthenes and aromatics in the extract and raffinate phase were measured and compared to values predicted by the UNIFAC group contribution model. It was shown that the UNIFAC model is capable of predicting the concentrations in this multicomponent system with an overall RMSD of 1.27 mol.%.