It is a polar solvent with strong solubility and good selectivity. Most organic compounds and polymers can be dissolved in sulfolane or miscible with it. Mainly used as extractant for aromatic extraction, solvent for polymer spinning or film casting, purification of natural chemical gas and syngas, refinery gas, purification and desulfurization of syngas, and solvent for rubber and plastics. In addition, it can also be used in textile printing and dyeing industry as printing and dyeing auxiliaries, which can make the color bright and bright.