The chlorine generated leaves the cells with the depleted brine. If high-purity chlorine is required (e.g. for a downstream VCM plant), hydrochloric acid can be added to the feed brine to reduce the oxygen content in the chlorine produced.
Once the wet chlorine gas has been cooled and filtered, it is either fed directly to the consumer plant (e.g. in the case of a hydrochloric acid plant) or it is dried and compressed before either being fed to the consumer plant (e.g. in the case of a VCM plant) or liquefied for storage in tanks.