Some of the chlorinated organic compounds are widely used commercially because of their advantageous chemical/physical properties or having toxicity for pestiferous living substances. Platinum and palladium supported on different carriers play very important role in catalytic hydrodechlorination of these compounds. We have prepared and applied Pt- and Pd-containing zeolite catalysts for hydrotreating of 2-chlorophenol using IR spectroscopic self-supporting wafer technique.