PROCESS FOR THE TREATMENT OF ACTIVATED CHARCOAL-BASED ADSORBENT IMPAIRED BY HYDROGEN CHLORIDE, ELEMENTAL MERCURY AND ITS COMPOUNDS

摘要

The process is based on that on the active carbon of the mercury-contaminated adsorbent the desorption of the salt acid from the active carbon of the adsorbent runs under the temperature 100 to 150 °C under the atmospheric pressure in the inert atmosphere of nitrogen. Relevant is, that the dry distillation runs under the temperature 250 to 300 °C and pressure of 0.02 to 0.035 Mpa in the inert atmosphere of the nitrogen with consequential condensation by de-mercurization of the occurred mercury vapours and mercuric chloride. At the beginning of the treatment it is possible to neutralise the contaminated active carbon by adding the calcium oxide with 5 % excess of the calculated molar ratio to the contents of the hydrogen chloride.