As a new separation technology, supercritical extraction is becoming more and more important. Much attention has been paid to supercritical vapor-liquid equilibrium which is closely related to the technology. A proper equation of state is usually used to correlate the supercritical vaporliquid equilibrium. In this paper, the R-K equation of state was modified with a parameter Ω of the subcritical component 2 to correlate the supercritical vapor-liquid equilibrium containing carbon dioxide. And the results a...