Catalytic converter for hydrochloric acid-containing exhaust gases

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The present invention relates to a process for reactivating a catalyst which comprises a zeolite doped with an iron species, which comprises the step of treating the catalyst with hydrogen chloride-containing gas. The invention further relates to a reactivated catalyst which is obtained with the aid of the process according to the invention and to the use thereof for treatment of off-gases from incineration processes, especially for the treatment of off-gases from refuse incineration plants, very particularly for the reduction of nitrogen oxides.