This research provides solubility data required for environmental applications involving the extraction of heavy hydrocarbons with compressed gases. Dibenzothiophene (DBT), 2-nitrophenyl disulfide (NPDS), and tetramethylthiuram disulfide (TTDS) have been selected as model compounds for this type of pollutants and isobutane as compressed gas. The solubilities obtained at 367-413 K and 3.9-7.5 MPa, expressed as solute mole fractions, were in the ranges 0.0250.106 for DBT, 1.2 x 10(-4) -6.3 x 10(-4) for NPDS, and between 2.7 x 10(-4) and 1.8 x 10(-3) for TTDS. They were compared to other pollutants solubilities (anthracene and carbazole). From the comparison, the following solubility order was established: DBT> anthracene> carbazole> TTDS> NPDS. Furthermore, when comparing these isobutane solubilities to those in propane and CO2, they were found to be about one and two magnitude orders larger, respectively. Results obtained were explained considering solvent density, solute vapor pressure, and interactions between solutes and solvent. Peng-Robinson equation was used to correlate the data and a good fitting attained. VC 2016 American Institute of Chemical Engineers