The conductivity of polyaniline can be controlled depending on the doping mechanism. Porosity of polyaniline seems to be one of the important factors of solid state doping, and depends on several synthesis process parameters as well as subsequent refining steps. Results of studies on polyaniline refinement with common solvents: methanol, chloroform, DMF and THF are presented. The effect of solvent type used for extraction on the polyaniline porosity is discussed.