To estimate the amount of dissolved propene gas in various industrial solvents especially in the early time of polymerization in slurry-phase propene polymerization and consequently achieve real polymer productivity, the precise experimental solubility data are needed. The solubility of propene in methylbenzene and heptane was measured at pressures from (0.13 to 1.27) MPa and temperatures ranging from (313 to 359) K. A static apparatus is used to measure the experimental data. The experimental data are modeled using the Peng-Robinson cubic equation of state (PR CEOS) with the van der Waals (vdW) mixing rule with two adjustable parameters. The modeling results show that the PR CEOS experimental data well. is capable to represent the