1. A process for the dehalogenation of a halogen-containing brine in an apparatus comprising

(1) a nozzle (1) for converting pressure energy of a liquid into. kinetic energy,
(2) at least one desorption tube (4) extending from the nozzle (1) and having a gas-tight connection thereto and having an inlet end of the same or of larger cross-sectional area than that of the outlet of the nozzle (1), and
(3) a vessel (9) connected to the outlet and of the desorption tube (4) and having a gas-tight connection thereto, the vessel (9) being equipped with

means for removing halogen and brine therefrom, the process comprising causing pressurised halogen-containing brine to issue from the nozzle in the form of a jet which diverges downstream of the nozzle (1) and which comes into contact with the entire inner periphery of a part of the desorption tube (4) to seal a totally enclosed space between the jet and the desorption tube (4). and then to pass to the vessel (9), and removing from the vessel (9) halogen and dehalogenated brine.