Hydrochloric acid was found the most effective extracting liquid for the process of the chromium-copper catalyst washout from the surface of activated carbon impregnated with ammonium solutions of salts of those metals. The most effective extracting liquid was found hydrochloric acid but in that case the degree of Cr-Cu catalyst washing out from the adsorbent was much lower than the rate of pure catalyst solubility. Probable reason in the catalyst deposition in pores of carbon, so the exposure of the catalyst on the action of washing liquid well as the transportation of dissolved substances to liquid phase were strongly hindered. It has been stated that the catalyst dissolution is a long lasting process.