Sulfolane aromatics extraction (SAE) is a typical physical process to recover high purity BTX simultaneously from C6-C8 cut of reformate or hydrogenated pyrolysis gasoline. In this process, sulfolane is used as selective solvent. Using the solvent with different solubility and selectivity to the aromatics and non-aromatics, high purity BTX can be obtained through the combination of liquid-liquid extraction and stripping distillation. After further fractionation, high purity benzene, toluene and C8 aromatics are produced.