Process for the manufacture of solutions of halogens

Process for the manufacture of highly concentrated solutions of at least one halogen in water, comprising continuously recirculating said solution by pressure applied thereto along a closed loop trajectory in a constant circular direction, continuously injecting into said recirculated solution at a first point of said trajectory in the direction of circulation, a weaker solution, the halogen concentration of which may have a nil value, continuously injecting halogen into said circuit, at a second point of said trajectory, different from said first point, in the direction of circulation, continuously drawing off at a third point of said trajectory, distinct from said first and second points a controllably variable liquid volume which is a fraction only of said highly concentrated solution, which fraction may have a nil value, while continuously to recirculate under said pressure the remaining solution in the circuit, and automatically feeding at said first point a volume of said weaker solution equal to the volume of said drawn off fraction, said pressure applied to the solution being independent of the pressure of the weaker solution and halogen injected at said first and second points.