Separation processes
Treatment of aromatic essences for the petrochemical industry.

Various separation techniques are used within the aromatic complex. These techniques are used :

• or to isolate certain cuts; for example the separation of the C ₈ -aromatic cut from heavier compounds by distillation or the separation between aromatic compounds and other compounds on the ${\text{C}}_{7^{-}}$ cut by extractive distillation;

• or to produce high-purity aromatic compounds, such as toluene by distillation or paraxylene by molecular sieve adsorption....