Technology Unit

FCC Gasoline is fed to the Extractive Distillation Column (EDC).  In a Vapor-Liquid Operation, the Solvent extracts the Sulfur Compounds into the Bottoms of the Column along with the Aromatic Components while rejecting the Olefins and Non-Aromatics into the Overhead as Raffinate.  Nearly all of the Non-Aromatics, including Olefins, are effectively separated into the Raffinate Stream. The Raffinate Stream can be optionally Caustic washed before routing to the Gasoline Pool or to an Aromatization Unit to further increase Benzene, Toluene and Xylene (BTX) Production.