Cyclobutylene inkstone also known as tetrahydrothiophen-1, 1 oxide, colorless transparent liquid, is an excellent aprotic polar solvent, can be mixed with water, acetone, toluene.It is also an ideal solvent for aromatics extraction process in petrochemical industry.It is easy to decompose under high temperature.Under 220 ℃, the decomposition speed is slow, but more than 220 ℃, with the increase of temperature, the decomposition rate has risen sharply, high temperature will make polymer and sulfur dioxide generated black ring Ding Yan decomposition, the presence of air, due to air oxidation, solvent system, the amount of the release of sulfur dioxide in more than exist without air.
Name: Tetramethylene sulfone
Other name: Sulfolane; 2,3,4,5-Tetrahydrothiophene-1,1-dioxide; Thioxyclopentane-1,1-dioxide; (Cyclo) Tetramethylene Sulfone; Tetrahydrothiophene S,S-dioxide; Tetramethylene sulphone; Sulpholane
Molecular formula: C4H8O2S
Molecular weight: 120.17
Properties：colorless transparent liquid。
Boiling point（ºC,101.3kPa）：287.3
Melting point（ºC）：28.45
Relative density （g/mL,30/4ºC）：1.2614
Relative vapor density（g/mL,air=1）：4.2
Refractive index（30ºC）：1.4820
Viscosity（mPa·s,30ºC）：10.286
Flash point（ºC）：166
Heat of evaporation （KJ/mol,100ºC）：62.8
Heat of melting（KJ/mol）：1.42
Heat of combustion（KJ/kg）：11.42
Heat capacity（KJ/(kg·K),30ºC,Constant pressure）：1.50
Electricity conductivity（S/m,30ºC）：<2×10-8
Vapor pressure（kPa,150ºC）：1.93
Steam pressure（kPa,118ºC）：0.67
Solubility: it is miscible with almost all organic solvents.It can dissolve most organic compounds except aliphatic hydrocarbons.It also dissolves inorganic salts and polymers.