Procedure for obtaining chlorine.

Process for preparing chlorine from hydrogen chloride, with the following steps: a) Introduction of a a1 stream containing hydrogen chloride and a2 stream containing oxygen in an oxidation zone and catalytic oxidation of hydrogen chloride to chlorine, obtaining a gas flow a3 comprising chlorine, water, oxygen, carbon dioxide and inert gases; b) contacting, in an apparatus for contacting stages, the gas stream a3 with aqueous I hydrochloric acid and partial separation of water and hydrogen a3 flow chloride, obtaining a gas flow b that containing hydrogen chloride, chlorine, water, oxygen, carbon dioxide and possibly inert gases also at least 5% of the hydrogen chloride content in the stream a3 remaining in the gas stream b; c) drying the gas stream b to obtain a gas stream c essentially free of water, containing hydrogen, chlorine, oxygen, carbon dioxide and chloride possibly inert gases; d) partial liquefaction of the gas stream c by compression and cooling, obtaining a flow d at least partially liquid; e) Separation of gas and liquid flow d in flow e1 gas containing chlorine, oxygen, carbon dioxide, hydrogen chloride and possibly inert gases and a liquid stream e2 comprising hydrogen chloride, chlorine, oxygen and carbon dioxide and, eventually, a return of at least a portion of the gas stream e1 to step a); f) separation of the liquid stream e2 by distillation in a column, into a chlorine stream f1 and f2 flow consisting essentially of hydrogen, oxygen and carbon dioxide chloride, also a part of the hydrogen chloride is condensed in the top of the column and is fed back to the column, so a stream f2 with a chlorine content <1% by weight is obtained.