The use of supercritical CO2 (SCCO2) as an alternative solvent in reactional systems has received increased attention nowadays because of its favorable transport properties that can accelerate mass-transfer limited reactions and also because of imposed environmental restrictions. The comprehension of the phase behavior of the reaction mixture is of relevance to determine selectivity and yield of such reactions at high pressures. In this context, the main objective of this work was to investigate the high-pressure phase equilibrium behavior of binary systems formed by CO2 with the reactant (limonene), the most common solvents (acetonitrile and dichloromethane), and catalysts and the main products (carvone and 1,2-limoneneoxide) of the limonene catalytic oxidation reactions. The experimental data were measured using the static synthetic method with a variable-volume view cell in the temperature range from (313 to 343) K. Experimental data obtained were corrected modeled with the Peng-Robinson equation of state with the classical quadratic mixing rules.