PhMe/thiophene and n-heptane/thiophene org. mixts. were Sepd. by vacuum pervaporation by using a com. hydrophobic poly(dimethylsiloxane)-based membrane. Both, hydrocarbon and thiophene fluxes increased with the increasing temp. and thiophene concn. and were higher for the PhMe/thiophene mixts. while the enrichment coeff. was lower.