سولفولان

Also known as tetramethylene sulfone, (CH2)4SO2, tetrahydrothiophene 1-dioxide, sulfolan, 1,1-dioxidetetrahydrothiophene, 2,3,4,5-tetrahydrothiophene-1,1-dioxide, thiophane dioxide, thiacyclopentane dioxide

Sulfolane (also tetramethylene sulfone, systematic name: 1-thiolane-1,1-dione) is an organosulfur compound, formally a cyclic sulfone, with the formula . It is a colorless liquid commonly used in the chemical industry as a solvent for extractive distillation and chemical reactions. Sulfolane was originally developed by the Shell Oil Company in the 1960s as a solvent to purify butadiene. Sulfolane is a polar aprotic solvent, and it is miscible with water.