Sulfolane process was developed by the research staff of the Shell organization in order to extract aromatics of high purity from the stocks such as pyrolysis gasoline and catalytic reformate.
Based on various articles, solvent properties and process features were described.
The following were concluded;
(1) As sulfolane has high solvency, solvent ratio at an extractor can be reduced, resulting in lower construction and operation cost.
(2) As Sulfolane has higher selectivity to aromatics, both recovery rate and purity of aromatic products are very high.
(3) By use of Rotating Disc. Contactors, extraction and raffinate water wash can be made effectivety.
(4) Due to the above advantages, Sulfolane process has been applied world-wide.
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