Two-stage method for recovering halogenated hydrocarbons

Process for recovering halogenated hydrocarbons,

• wherein in a desorption step an adsorbent comprising adsorbed halogenated hydrocarbons is streamed through by water vapor, resulting in a secondary volume flow comprising halogenated hydrocarbons,
• and wherein the secondary volume flow is converted by cooling into a condensate containing halogenated hydrocarbons and water, from which the halogenated hydrocarbons are separated,
• characterized in that
• in a sterilization step preceding the desorption step, the adsorbent comprising adsorbed halogenated hydrocarbons is
• for at least 10 min, in particular for 10 to 60 min,
• at a temperature of more than 120° C., in particular from 121 to 150° C., and
• at a pressure of from 0.15 MPa to 0.4 MPa, in particular from 0.15 to 0.3 MPa brought into contact with water vapor.